Dual-channel optical module and dual-plane switch

Abstract

The invention discloses a dual-channel optical module and a dual-plane switch. The dual-channel optical module comprises a photoelectric conversion module used for receiving a first sending electric signal and converting the first sending electric signal into a first emission optical signal, and receiving a second sending electric signal and converting the second sending electric signal into a second emission optical signal; the receiving module is also used for receiving the first receiving optical signal and converting the first receiving optical signal into a first receiving electric signal, and receiving the second receiving optical signal and converting the second receiving optical signal into a second receiving electric signal; the wavelength of the first receiving optical signal is different from that of the second receiving optical signal; the first transmitting optical signal and the first receiving optical signal have the same wavelength, and the second transmitting optical signal and the second receiving optical signal have the same wavelength. According to the dual-channel optical module and the dual-plane switch provided by the embodiment of the invention, dual services can be effectively isolated, a function of effectively preventing wrong connection of an optical fiber interface can be realized, and the system stability is improved.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and particularly to a dual-channel optical module and a dual-plane switch. Background Art

[0002] In some special fields, such as power distribution networks, for safety and ease of operation and maintenance considerations, it is necessary to isolate the services in Zone I / II and Zone III and separately transmit and control them. Among them, the services in Zone I / II generally refer to power grid control and dispatching, and acquisition services; the services in Zone III generally refer to informatization services. The traditional solution is to separately network the services in Zone I / II and Zone III. For example, the services in Zone I / II use Ethernet, while the services in Zone III use 4G / 5G wireless networks. The disadvantage of this method is that the types of equipment invested are relatively many, the complexity is high, and the operation and maintenance difficulty is great.

[0003] To facilitate operation and maintenance and save the cost of renting wireless networks, a dual-plane switch can be used to achieve hard service isolation of two types of services that need to be isolated on one switch. A dual-channel optical module is required for the dual-plane switch in dual-service isolation applications. Traditional dual-channel optical modules need to be used in pairs, that is, two types of optical modules, namely -A and -B, are required to achieve interconnection. When interconnecting the dual-channel optical modules -A and -B, great care is needed, and the optical fibers are easily connected wrongly, resulting in cross-over of the service signals of the first channel and the second channel. Summary of the Invention

[0004] The present invention discloses a dual-channel optical module and a dual-plane switch, which achieve hard service isolation of two types of services that need to be isolated on one switch through interconnection of the same type of optical modules.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] In a first aspect, the present invention provides a dual-channel optical module, including: an optoelectronic conversion module; the optoelectronic conversion module is configured to receive a first transmitted electrical signal sent by a first communication device and convert the first transmitted electrical signal into a first transmitted optical signal, and receive the second transmitted electrical signal and convert the second transmitted electrical signal into a second transmitted optical signal, and send the first transmitted optical signal and the second transmitted optical signal to a second communication device, wherein the wavelength of the first transmitted optical signal is different from the wavelength of the second transmitted optical signal;

[0007] The optoelectronic conversion module is further configured to receive a first received optical signal sent by a second communication device and convert the first received optical signal into a first received electrical signal, and receive a second received optical signal sent by the second communication device and convert the second received optical signal into a second received electrical signal, and send the first received electrical signal and the second received electrical signal to a first communication device; the wavelengths of the first received optical signal and the second received optical signal are different; the wavelength of the first transmitted optical signal is the same as that of the first received optical signal, and the wavelength of the second transmitted optical signal is the same as that of the second received optical signal.

[0008] When two such dual-channel optical modules are used for interconnection of dual-plane switches to achieve hard isolation of two types of services, the first dual-plane switch is connected to one end of the first dual-channel optical module. The other end of the first dual-channel optical module is connected to an optical fiber through the optoelectronic conversion module and is connected to the optoelectronic conversion module of the second dual-channel optical module. The other end of the second dual-channel optical module is connected to the second dual-plane switch. The first transmitted electrical signal of the first type of service of the first dual-plane switch is converted into a first transmitted optical signal by the optoelectronic conversion module in the first dual-channel optical module. The first transmitted optical signal is transmitted through the optical fiber to the second dual-channel optical module and is received as a first received optical signal by the optoelectronic conversion module in the second dual-channel optical module and is converted into a first received electrical signal and transmitted to the second dual-plane switch. The first transmitted electrical signal of the first type of service of the second dual-plane switch is converted into a first transmitted optical signal by the optoelectronic conversion module in the second dual-channel optical module. The first transmitted optical signal is transmitted through the optical fiber to the first dual-channel optical module and is received as a first received optical signal by the optoelectronic conversion module in the first dual-channel optical module and is converted into a first received electrical signal and transmitted to the first dual-plane switch. The second transmitted electrical signal of the second type of service of the first dual-plane switch is converted into a second transmitted optical signal by the optoelectronic conversion module in the first dual-channel optical module. The second transmitted optical signal is transmitted through the optical fiber to the second dual-channel optical module and is received as a second received optical signal by the optoelectronic conversion module in the second dual-channel optical module and is converted into a second received electrical signal and transmitted to the second dual-plane switch. The second transmitted electrical signal of the second type of service of the second dual-plane switch is converted into a second transmitted optical signal by the optoelectronic conversion module in the second dual-channel optical module. The second transmitted optical signal is transmitted through the optical fiber to the first dual-channel optical module and is received as a second received optical signal by the optoelectronic conversion module in the first dual-channel optical module and is converted into a second received electrical signal and transmitted to the first dual-plane switch. Thus, hard isolation of two types of services that need to be isolated is achieved on one switch.

[0009] In the above-mentioned dual-channel optical module, the wavelengths of the first transmitted optical signal and the second transmitted optical signal are different and can be transmitted in the same optical fiber; the wavelengths of the first received optical signal and the second received optical signal are different and can also be transmitted in the same optical fiber; since the wavelengths of the first transmitted optical signal and the first received optical signal are the same, the wavelength of the first transmitted optical signal and the wavelength of the second received optical signal are different and can also be transmitted in the same optical fiber; since the wavelength of the second transmitted optical signal is the same as that of the second received optical signal, the wavelength of the second transmitted optical signal and the wavelength of the first received optical signal are different and can also be transmitted in the same optical fiber. Therefore, when the first transmitted optical signal and the second received optical signal in the dual-channel optical module are transmitted in the same optical fiber, the second transmitted optical signal and the first received optical signal are transmitted in the same optical fiber; when the first transmitted optical signal and the second transmitted optical signal in the dual-channel optical module are transmitted in the same optical fiber, the first received optical signal and the second received optical signal are transmitted in the same optical fiber. In both cases when two dual-channel optical modules are interconnected, if the optical fiber interfaces are connected wrongly, the wavelengths of the transmitted optical signal and the received optical signal transmitted in the same optical fiber are the same. Due to the opposite transmission directions, the transmitted optical signal and the received optical signal with the same wavelength will interfere destructively, resulting in signal interruption, so that the problem can be detected in time, achieving the effect of effectively preventing the wrong connection of the optical fiber interfaces.

[0010] In some embodiments, the dual-channel optical module further includes an electrical interface and a laser driver module; the optoelectronic conversion module is connected to the electrical interface through the laser driver module;

[0011] The laser driver module is configured to receive a first transmitted electrical signal and a second transmitted electrical signal sent by a first communication device through the electrical interface, and transmit the first transmitted electrical signal and the second transmitted electrical signal to the optoelectronic conversion module;

[0012] The laser driver module is further configured to receive the first received electrical signal and the second received electrical signal, and send the first received electrical signal and the second received electrical signal to the first communication device through the electrical interface.

[0013] In some embodiments, the optoelectronic conversion module includes a first optical transceiver component and a second optical transceiver component;

[0014] The first optical transceiver component includes a first optical interface; the first optical interface is used for transmitting the first transmitted optical signal and also for receiving the second received optical signal;

[0015] The second optical transceiver component includes a second optical interface; the second optical interface is used for transmitting the second transmitted optical signal and also for receiving the first received optical signal.

[0016] In some embodiments, the electrical interface includes a first pair of transmit pins, a second pair of transmit pins, a first pair of receive pins, and a second pair of receive pins; the laser driver module includes a first laser driver chip and a second laser driver chip;

[0017] The first optical transceiver component further includes a first electrical signal interface and a second electrical signal interface; the second optical transceiver component further includes a third electrical signal interface and a fourth electrical signal interface;

[0018] The first pair of transmit pins is connected to the first electrical signal interface through the first laser driver chip to form a first electrical transmission channel; the fourth electrical signal interface is connected to the first pair of receive pins through the second laser driver chip to form a first electrical reception channel;

[0019] The second pair of transmit pins is connected to the third electrical signal interface through the second laser driver chip to form a second electrical transmission channel; the second electrical signal interface is connected to the second pair of receive pins through the first laser driver chip to form a second electrical reception channel.

[0020] In some embodiments, the dual-channel optical module further includes a circuit board. The first pair of transmit pins is connected to the first laser driver chip through a first trace of the circuit board; the first pair of receive pins is connected to the second laser driver chip through a second trace of the circuit board; the second pair of transmit pins is connected to the second laser driver chip through a third trace of the circuit board; the second pair of receive pins is connected to the first laser driver chip through a fourth trace of the circuit board; wherein the orthographic projection of the second trace on the circuit board and the orthographic projection of the fourth trace on the circuit board have an overlapping area.

[0021] In some embodiments, the optoelectronic conversion module includes an optical engine transmit component and an optical engine receive component; wherein:

[0022] The optical engine transmit component includes a third optical interface for transmitting the first transmitted optical signal and the second transmitted optical signal;

[0023] The optical engine receive component includes a fourth optical interface for receiving the first received optical signal and the second received optical signal.

[0024] In some embodiments, the electrical interface includes a first pair of transmit pins, a second pair of transmit pins, a first pair of receive pins, and a second pair of receive pins; the laser driver module includes a first laser driver chip and a second laser driver chip;

[0025] The optical engine transmitting component further includes a fifth electrical signal interface and a sixth electrical signal interface; the optical engine receiving component further includes a seventh electrical signal interface and an eighth electrical signal interface;

[0026] The first pair of transmitting pins is connected to the fifth electrical signal interface through the first laser driver chip to form a first electrical transmission channel; the seventh electrical signal interface is connected to the first pair of receiving pins through the first laser driver chip to form a first electrical reception channel;

[0027] The second pair of transmitting pins is connected to the sixth electrical signal interface through the second laser driver chip to form a second electrical transmission channel; the eighth electrical signal interface is connected to the second pair of receiving pins through the second laser driver chip to form a second electrical reception channel.

[0028] In some embodiments, the dual-channel optical module further includes a circuit board. The first pair of transmitting pins is connected to the first laser driver chip through the fifth trace of the circuit board; the first pair of receiving pins is connected to the first laser driver chip through the sixth trace of the circuit board; the second pair of transmitting pins is connected to the second laser driver chip through the seventh trace of the circuit board; the second pair of receiving pins is connected to the second laser driver chip through the eighth trace of the circuit board.

[0029] In some embodiments, the first laser driver chip is connected to the fifth electrical signal interface through the ninth trace of the circuit board; the seventh electrical signal interface is connected to the first laser driver chip through the tenth trace of the circuit board; the second laser driver chip is connected to the sixth electrical signal interface through the eleventh trace of the circuit board; the eighth electrical signal interface is connected to the second laser driver chip through the twelfth trace of the circuit board; wherein the orthographic projection of the tenth trace on the circuit board and the orthographic projection of the eleventh trace on the circuit board have an overlapping area.

[0030] In some embodiments, the dual-channel optical module further includes a controller, which is signal-connected to the electrical interface and the laser driver module for transmitting control signals.

[0031] In some embodiments, the dual-channel optical module further includes a housing. The laser driver module and the optoelectronic conversion module are accommodated in the housing; the electrical interface is disposed on a side of the housing away from the optoelectronic conversion module.

[0032] In a second aspect, the present invention further provides a dual-plane switch, including the dual-channel optical module according to any one of the first aspects. Description of the Drawings

[0033] Figure 1 Schematic diagram of the internal frame of a dual-plane switch

[0034] Figure 2 Functional block diagram of a dual-plane switch with a single dual-channel optical module slot

[0035] Figure 3 Internal functional block diagram of a traditional CSFP dual-channel optical module of type -A

[0036] Figure 4 Internal functional block diagram of a traditional CSFP dual-channel optical module of type -B

[0037] Figure 5 Schematic diagram of the incorrect connection of the interconnection optical fibers between type -A and type -B

[0038] Figure 6 Schematic diagram of the correct connection of the interconnection optical fibers between type -A and type -B

[0039] Figure 7 Internal functional block diagram of a dual-channel optical module provided by an embodiment of the present invention

[0040] Figure 8 Schematic diagram of the structure of two dual-plane switches interconnected by two dual-channel optical modules Figure 1 ;

[0041] Figure 9 Schematic diagram of the principle of the first optical transmitting and receiving component

[0042] Figure 10a and Figure 10b Schematic diagram of the gold finger pin structure

[0043] Figure 11 Another internal functional block diagram of a dual-channel optical module provided by an embodiment of the present invention

[0044] Figure 12 Schematic diagram of the structure of two dual-plane switches interconnected by two dual-channel optical modules Figure 2 ;

[0045] Figure 13 Functional block diagram of a dual-plane switch with multiple dual-channel optical module slots

[0046] Icons: 100 - Dual-channel optical module; 110 - Electrical interface; 120 - First laser driver chip; 130 - Second laser driver chip; 140 - First optical transceiver sub-assembly; 150 - Second optical transceiver sub-assembly; 160 - Optical engine transmitter assembly; 170 - Optical engine receiver assembly; 180 - Controller; 190 - Housing; 191 - Fiber optic interface; 191a - First single-fiber bi-directional optical interface; 191b - Second single-fiber bi-directional optical interface; 191c - Transmitting port; 191d - Receiving port; 200 - Dual-plane switch; 141 - Transmitting section; 142 - Receiving section; 143 - Filter; 144 - Pigtail; 161 - First optical transmitter; 162 - Second optical transmitter; 163 - Multiplexer; 171 - First optical receiver; 172 - Second optical receiver; 173 - Demultiplexer. Detailed implementation

[0047] First, introduce the application scenario of this application: Schematic diagram of the internal framework of a dual-plane switch, as Figure 1 shown, the dual-plane switch has 2 Media Access Control (MAC) chips, and each MAC chip is responsible for processing one type of information service. At the same time, the dual-plane switch needs to use a dual-channel optical module in the dual-service isolation application. The dual-plane switch can be designed in a style with a single dual-channel optical module slot or in a style with multiple dual-channel optical module slots. Figure 2 Functional block diagram of a dual-plane switch with a single dual-channel optical module slot.

[0048] For a traditional CSFP dual-channel optical module, the internal functional block diagram is as Figure 3 and Figure 4 shown. In Module -A, as Figure 3 shown, the transmitting optical signal wavelength of the first optical transceiver sub-assembly (Bi-Directional Optical Sub-Assembly, BOSA for short) is λ1, and the receiving optical signal wavelength is λ2. The transmitting optical signal wavelength of the second optical transceiver sub-assembly is λ1, and the receiving optical signal wavelength is λ2. Here, T represents transmission and R represents reception. It can be seen that in Module -A, the transmitting wavelengths of the first optical transceiver sub-assembly and the second optical transceiver sub-assembly are the same, and the receiving wavelengths of the first optical transceiver sub-assembly and the second optical transceiver sub-assembly are the same. In Module -B, as Figure 4As shown, the wavelength of the transmitted optical signal of the first optical transmitting and receiving component is λ2, and the wavelength of the received optical signal is λ1. The wavelength of the transmitted optical signal of the second optical transmitting and receiving component is λ2, and the wavelength of the received optical signal is λ1. Here, T represents transmission and R represents reception. It can be seen that: - In module -B, the wavelengths of the optical signals transmitted by the first and second optical transmitting and receiving components are the same, and the wavelengths of the optical signals received by the first and second optical transmitting and receiving components are the same. - Modules A and -B need to be used in pairs, that is, two types of optical modules, -A and -B, are required to achieve interconnection. For details, see Figure 5 and Figure 6 . However, when interconnecting traditional CSFP dual - channel optical modules -A and -B, great care is needed because the optical fibers are easily connected wrongly, otherwise it is very easy to cause the cross - connection of service signals in the first and second channels. As Figure 5 shown, due to the wrong connection of the optical fiber interface, the services in the first and second channels are crossed. And because the wavelength matching relationship of the optical module is correct, the signal can still be transmitted in the optical channel and cannot be blocked in time.

[0049] Based on the above application scenarios, the embodiments of the present application provide a dual - channel optical module and a dual - plane switch, which can effectively isolate dual services and have the function of effectively preventing the wrong connection of optical fiber interfaces, improving the system stability.

[0050] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Among them, in the description of the embodiments of the present application, unless otherwise specified, " / " means "or". For example, A / B can mean A or B; "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality" means two or more than two.

[0051] Hereinafter, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as implying or suggesting relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "a plurality" is two or more than two.

[0052] In a first aspect, an embodiment of the present invention provides a dual - channel optical module 100, asFigure 7 As shown in the figure, it includes: an optoelectronic conversion module N; the optoelectronic conversion module N is used to receive the first transmitted electrical signal t1 sent by the first communication device and convert the first transmitted electrical signal t1 into the first transmitted optical signal T1, and receive the second transmitted electrical signal t2 and convert the second transmitted electrical signal t2 into the second transmitted optical signal T2, and send the first transmitted optical signal T1 and the second transmitted optical signal T2 to the second communication device, where the wavelength of the first transmitted optical signal T1 is different from the wavelength of the second transmitted optical signal T2; the optoelectronic conversion module N is also used to receive the first received optical signal R1 sent by the second communication device and convert the first received optical signal R1 into the first received electrical signal r1, and receive the second received optical signal R2 sent by the second communication device and convert the second received optical signal R2 into the second received electrical signal r2, and send the first received electrical signal r1 and the second received electrical signal r2 to the first communication device; the wavelength of the first received optical signal R1 is different from the wavelength of the second received optical signal R2; the wavelength of the first transmitted optical signal T1 is the same as the wavelength of the first received optical signal R1, and the wavelength of the second transmitted optical signal T2 is the same as the wavelength of the second received optical signal R2. Exemplarily, the wavelengths of both the first transmitted optical signal T1 and the first received optical signal R1 are λ1; the wavelengths of both the second transmitted optical signal T2 and the second received optical signal R2 are λ2, and the values of λ1 and λ2 are different.

[0053] As Figure 7 shown in the figure, both the first transmitted electrical signal t1 and the first received electrical signal r1 are represented by solid lines, and the arrow indicates the transmission direction of the optical signal. Both the second transmitted electrical signal t2 and the second received electrical signal r2 are represented by dashed lines, and the arrow indicates the transmission direction of the optical signal. Both the first transmitted optical signal T1 and the first received optical signal R1 are represented by solid lines, and the arrow indicates the transmission direction of the optical signal. Both the second transmitted optical signal T2 and the second received optical signal R2 are represented by dashed lines, and the arrow indicates the transmission direction of the optical signal. The optoelectronic conversion module N is connected to two single-fiber bidirectional optical fibers. One optical fiber transmits the first transmitted optical signal T1 and the second received optical signal R2, and the other optical fiber transmits the second transmitted optical signal T2 and the first received optical signal R1. It can be understood that the wavelength of the first transmitted optical signal T1 is different from the wavelength of the second received optical signal R2 and can be transmitted in the same optical fiber; the wavelength of the second transmitted optical signal T2 is different from the wavelength of the first received optical signal R1 and can be transmitted in the same optical fiber.

[0054] As Figure 8 shown in the figure, when two such dual-channel optical modules 100 are interconnected by the dual-plane switch 200 to achieve hard isolation of two types of services, it is defined that Figure 8 the dual-plane switch 200 on the left in the figure is the first dual-plane switch 200, and the dual-channel optical module 100 inserted into the first dual-plane switch 200 is the first dual-channel optical module 100; it is defined that Figure 8The dual-plane switch 200 on the right side of the middle is the second dual-plane switch 200, and the dual-channel optical module 100 inserted into the second dual-plane switch 200 is the second dual-channel optical module 100. One end of the first dual-plane switch 200 is connected to one end of the first dual-channel optical module 100. The other end of the first dual-channel optical module 100 is connected to an optical fiber through an optoelectronic conversion module and is connected to the optoelectronic conversion module of the second dual-channel optical module 100. The other end of the second dual-channel optical module 100 is connected to the second dual-plane switch 200. The first transmission electrical signal t1 of the first type of service of the first dual-plane switch 200 is converted into a first transmitted optical signal T1 through the optoelectronic conversion module in the first dual-channel optical module 100. The first transmitted optical signal T1 is transmitted through the optical fiber to the second dual-channel optical module 100 and is converted into a first received electrical signal r1 by the optoelectronic conversion module in the second dual-channel optical module 100 and then transmitted to the second dual-plane switch 200. The first transmission electrical signal t1 of the first type of service of the second dual-plane switch 200 is converted into a first transmitted optical signal T1 through the optoelectronic conversion module in the second dual-channel optical module 100. The first transmitted optical signal T1 is transmitted through the optical fiber to the first dual-channel optical module 100 and is converted into a first received electrical signal r1 by the optoelectronic conversion module in the first dual-channel optical module 100 and then transmitted to the first dual-plane switch 200. The second transmission electrical signal t2 of the second type of service of the first dual-plane switch 200 is converted into a second transmitted optical signal T2 through the optoelectronic conversion module in the first dual-channel optical module 100. The second transmitted optical signal T2 is transmitted through the optical fiber to the second dual-channel optical module 100 and is converted into a second received electrical signal r2 by the optoelectronic conversion module in the second dual-channel optical module 100 and then transmitted to the second dual-plane switch 200. The second transmission electrical signal t2 of the second type of service of the second dual-plane switch 200 is converted into a second transmitted optical signal T2 through the optoelectronic conversion module in the second dual-channel optical module 100. The second transmitted optical signal T2 is transmitted through the optical fiber to the first dual-channel optical module 100 and is converted into a second received electrical signal r2 by the optoelectronic conversion module in the first dual-channel optical module 100 and then transmitted to the first dual-plane switch 200. Thus, hard service isolation of two types of services that need to be isolated is achieved on one switch.

[0055] It can be understood that optical signals with different wavelengths can be transmitted in one optical fiber. For example: Figure 7As shown, the wavelength λ1 of the first transmitted optical signal T1 is different from the wavelength λ2 of the second received optical signal R2, and they can be transmitted in the same optical fiber; the wavelength λ2 of the second transmitted optical signal T2 is different from the wavelength λ1 of the first received optical signal R1, and they can also be transmitted in the same optical fiber. Therefore, when the first transmitted optical signal T1 and the second received optical signal R2 in the dual-channel optical module 100 are transmitted in the same optical fiber, the second transmitted optical signal T2 and the first received optical signal R1 are transmitted in the same optical fiber, as Figure 7 shown. In this case, when two dual-channel optical modules 100 are interconnected, if the optical fiber interface 191 is connected wrongly, the wavelengths of the transmitted optical signal and the received optical signal transmitted in the same optical fiber are the same. Since the transmitted optical signal and the received optical signal with the same wavelength in the opposite transmission directions will interfere and cancel each other, resulting in signal interruption, the problem can be detected in time, achieving the effect of effectively preventing the optical fiber interface 191 from being connected wrongly.

[0056] In some embodiments, as Figure 7 and Figure 8 shown, the dual-channel optical module further includes an electrical interface 110 and a laser driver module M; the dual-channel optical module is connected to a communication device such as a dual-plane switch through the electrical interface 110, and the optoelectronic conversion module N is connected to the electrical interface 110 through the laser driver module M; the laser driver module M is configured to receive the first transmitted electrical signal t1 and the second transmitted electrical signal t2 sent by the first communication device through the electrical interface 110, and transmit the first transmitted electrical signal t1 and the second transmitted electrical signal t2 to the optoelectronic conversion module N; the laser driver module M is further configured to receive the first received electrical signal r1 and the second received electrical signal r2, and send the first received electrical signal r1 and the second received electrical signal r2 to the first communication device through the electrical interface 110.

[0057] In some embodiments, the optoelectronic conversion module includes a first optical transceiver component 140 and a second optical transceiver component 150; the first optical transceiver component 140 includes a first optical interface; the first optical interface is used to transmit the first transmitted optical signal T1 and is also used to receive the second received optical signal R2; the second optical transceiver component 150 includes a second optical interface; the second optical interface is used to transmit the second transmitted optical signal T2 and is also used to receive the first received optical signal R1.

[0058] In some embodiments, as Figure 7As shown, the electrical interface 110 includes a first transmission pin pair (transport1, abbreviated as TX1), a second transmission pin pair (transport 2, abbreviated as TX2), a first reception pin pair (receive1, abbreviated as RX1), and a second reception pin pair (receive 2, abbreviated as RX2); the laser driver module M includes a first laser driver chip 120 and a second laser driver chip 130; the first optical transmission and reception component 140 further includes a first electrical signal interface and a second electrical signal interface; the second optical transmission and reception component 150 further includes a third electrical signal interface and a fourth electrical signal interface; the first transmission pin pair TX1 is connected to the first electrical signal interface through the first laser driver chip 120 to form a first electrical transmission channel; the fourth electrical signal interface is connected to the first reception pin pair RX1 through the second laser driver chip 130 to form a first electrical reception channel; the second transmission pin pair TX2 is connected to the third electrical signal interface through the second laser driver chip 130 to form a second electrical transmission channel; the second electrical signal interface is connected to the second reception pin pair RX2 through the first laser driver chip 120 to form a second electrical reception channel.

[0059] It should be noted that since the first transmitted electrical signal t1, the second transmitted electrical signal t2, the first received electrical signal r1, and the second received electrical signal r2 are all differential signals, differential traces are used to carry the differential signals. The pin pair here can be understood as a pair of pins for connecting differential traces.

[0060] Continue to refer to Figure 7, the optoelectronic conversion module N includes two bi - directional optical sub - assemblies (BOSA), namely the first bi - directional optical sub - assembly 140 and the second bi - directional optical sub - assembly 150. A bi - directional optical sub - assembly is a single - fiber bi - directional optical device that integrates a transmitting optical sub - assembly (TOSA) and a receiving optical sub - assembly (ROSA). Among them, TOSA is a component that uses a laser diode (LD) to convert an electrical signal into an optical signal and transmit it, and ROSA is a component that uses a photo - diode (PD) to convert the received optical signal into an electrical signal. It should be noted that the first bi - directional optical sub - assembly 140 and the second bi - directional optical sub - assembly 150 may also include a transimpedance amplifier (TIA), and the transimpedance amplifier is used in conjunction with the laser diode and the photo - diode. When it is necessary to convert an optical signal into an electrical signal, the photo - diode converts the optical signal into a current signal, and the TIA processes the current signal into a voltage signal with a certain amplitude. The processed electrical signal is transmitted to a laser driver chip such as the first laser driver chip 120 or the second laser driver chip 130. Both the first laser driver chip 120 and the second laser driver chip 130 contain a clock and data recovery chip (CDR), a laser diode driver chip (LDD), and a limiting amplifier (LA). The output amplitude of the TIA changes with the change of the received optical power. The function of the LA is to process the changing output amplitude into an equal - amplitude electrical signal and provide a stable voltage signal to the CDR. When it is necessary to convert an electrical signal into an optical signal, the first laser driver chip 120 or the second laser driver chip 130 processes the electrical signal and then transmits it to the TOSA. The TOSA modulates the electrical signal into an optical signal and then sends it out.

[0061] Exemplarily, as Figure 9 shown, the bi - directional optical sub - assembly includes a transmitting part 141, a receiving part 142, a filter 143, and a pigtail 144. Its main function is to convert electrical signals and optical signals into each other.

[0062] In some embodiments, the dual-channel optical module 100 further includes a housing 190, and the laser driver module M and the optoelectronic conversion module N are accommodated in the housing 190; the electrical interface 110 is disposed on a side of the housing 190 away from the optoelectronic conversion module, and the first optical interface and the second optical interface are disposed on the same side of the housing 190 and are both located at one end facing away from the electrical interface 110.

[0063] Continuing to refer to Figure 7 , for each optical transceiver component of the dual-channel optical module 100 provided in this embodiment, an optical fiber interface 191 is provided, and the optical fiber interface 191 can be a single-fiber bidirectional Lucent connector (LC) optical interface.

[0064] As Figure 7 shown, the first transmit pin pair TX1 is connected to the first electrical signal interface through the first laser driver chip 120 to form a first electrical transmission channel; the fourth electrical signal interface is connected to the first receive pin pair RX1 through the second laser driver chip 130 to form a first electrical reception channel; the first electrical transmission channel and the first electrical reception channel form an electrical signal channel of service one in the dual-channel optical module 100, as Figure 7 shown by the solid-line arrows in. The second transmit pin pair TX2 is connected to the third electrical signal interface through the second laser driver chip 130 to form a second electrical transmission channel; the second electrical signal interface is connected to the second receive pin pair RX2 through the first laser driver chip 120 to form a second electrical reception channel; the second electrical transmission channel and the second electrical reception channel form an electrical signal channel of service two in the dual-channel optical module 100, as Figure 7 shown by the dashed-line arrows in. The electrical signals of service one and the electrical signals of service two are transmitted through two independent channels respectively, realizing the hard isolation of services.

[0065] In some embodiments, the dual-channel optical module 100 further includes a circuit board. The first transmit pin pair is connected to the first laser driver chip 120 through the first trace of the circuit board; the first receive pin pair is connected to the second laser driver chip 130 through the second trace of the circuit board; the second transmit pin pair is connected to the second laser driver chip 130 through the third trace of the circuit board; the second receive pin pair is connected to the first laser driver chip 120 through the fourth trace of the circuit board; wherein the orthographic projection of the second trace on the circuit board and the orthographic projection of the fourth trace on the circuit board have an overlapping area.

[0066] In a possible implementation manner, the dual-channel optical module 100 further includes a circuit board, and the laser driver module and the optoelectronic conversion module are both integrated on the circuit board, and the circuit board is connected to the electrical interface 110 through traces. Specifically, as Figure 7As shown, the first transmit pin pair TX1 and the first laser driver chip 120 are connected through the first trace of the circuit board; the first receive pin pair RX1 and the second laser driver chip 130 are connected through the second trace of the circuit board; the second transmit pin pair TX2 and the second laser driver chip 130 are connected through the third trace of the circuit board; the second receive pin pair RX2 and the first laser driver chip 120 are connected through the fourth trace of the circuit board; wherein the orthographic projection of the second trace on the circuit board and the orthographic projection of the fourth trace on the circuit board have an overlapping area, that is, the RX1 and RX2 signal lines of the two channels are crossed. The purpose of such a setting will be described in detail below:

[0067] As Figure 8 shown, two same-type dual-plane switches 200 are interconnected through two same-type dual-channel optical modules 100. The dual-plane switch 200 includes two Media Access Controls (MACs), namely MAC1 and MAC2, which process two different services respectively. Exemplarily, MAC1 processes service one and MAC2 processes service two. That is to say, the data sent by MAC1 on the left must ultimately return to MAC1 on the right, and the data sent by MAC2 on the left must also ultimately return to MAC2 on the right, and vice versa. The MAC1 of the dual-plane switch 200 is electrically interconnected with the service one electrical signal channel of the dual-channel optical module 100, and the MAC2 is electrically interconnected with the service two electrical signal channel of the dual-channel optical module 100. After the dual-channel optical module 100 is inserted into the dual-plane switch 200, during normal use, the two dual-channel optical modules 100 are optically interconnected, and the first single-fiber bidirectional optical interface 191a must be connected to the second single-fiber bidirectional optical interface 191b of the opposite end; otherwise, the optical link is not working. The information sent by MAC1 of the left dual-plane switch 200 will reach the service two electrical signal channel of the dual-channel optical module 100 of the opposite end, and the service two electrical signal channel of the dual-channel optical module 100 of the opposite end is electrically interconnected with MAC2 of the dual-plane switch 200 of the opposite end. If the RX signal line of the dual-channel optical module 100 does not take a crossed trace, the information sent by MAC1 of the left dual-plane switch 200 will ultimately reach MAC2 of the dual-plane switch 200 of the opposite end, which is equivalent to MAC1 on the left sending and MAC2 on the right receiving, and the two types of services are cross-channeled, resulting in crossover between the two types of services and inability to achieve hard service isolation.

[0068] It should also be noted that since the up-and-down positions of the two MACs in the dual-plane switch 200 are fixed. For example, when the dual-plane switch 200 is located Figure 8 on the left side, MAC1 is on the top and MAC2 is on the bottom; if the left dual-plane switch 200 is moved to the right side, the positions of the MAC chips are as Figure 8As shown, MAC2 is on top and MAC1 is at the bottom. If the upper and lower MAC chips on the right are swapped, that is, MAC1 is on top and MAC2 is at the bottom, then the two dual-plane switches 200 on the left and right will be two different models, thus increasing the manufacturing cost of the switch. Therefore, when two dual-plane switches 200 of the same model are interconnected left and right through two dual-channel optical modules 100 of the same type, the signal lines of RX1 and RX2 need to be cross-set. In addition, the cross-setting here is not a cross-connection, but a spatial cross.

[0069] In some embodiments, the dual-channel optical module 100 further includes a controller 180. The controller 180 is signal-connected to the electrical interface 110 and the laser driver module, and is used to transmit control signals. For a communication device such as a chip of a dual-plane switch to access the dual-channel optical module, it is connected to the controller 180 of the dual-channel optical module through the electrical interface 110. At the same time, the controller 180 is connected to the laser driver module to realize the transmission of control signals and complete the signal interaction between the communication device and the dual-channel optical module.

[0070] Referring to Figure 7 , the controller 180 is a single-chip microcomputer. The single-chip microcomputer is connected to the electrical interface 110 and is used to transmit communication control signals. At the same time, the single-chip microcomputer is respectively connected to the first laser driver chip 120 and the second laser driver chip 130.

[0071] In a possible implementation manner, the electrical interface 110 of the dual-channel optical module 100 is a gold finger electrical interface 110, and partially follows the regulations of the Compact Small Form-Factor Pluggable Multi-Source Agreement (CSFP MSA) 2.0 (Option2). The CSFP MSA Option2 protocol stipulates the electrical definition of the gold finger of the dual-channel optical module 100, and the gold finger electrical definition of the dual-channel optical module 100 in this application partially follows this protocol, and some pin definitions are changed. As Figure 10a and Figure 10b shown, Figure 10a is a schematic diagram of the bottom layer pins of the gold finger, Figure 10bIt is a schematic diagram of the top layer pins of the gold finger. The electrical definitions of the gold finger of the dual-channel optical module 100 in this application are shown in Table 1. Among them, the first transmit pin pair TX1 corresponds to pins 18 and 19 of the gold finger, the second transmit pin pair TX2 corresponds to pins 7 and 6 of the gold finger, the first receive pin pair RX1 corresponds to pins 13 and 12 of the gold finger, and the second receive pin pair RX2 corresponds to pins 9 and 10 of the gold finger. Pin 4 is connected to the data pin on the microcontroller, and the data pins of the microcontroller are also respectively connected to the data pins on the first laser driver chip 120 and the second laser driver chip 130. Pin 5 is connected to the clock pin on the microcontroller, and the clock pins of the microcontroller are also respectively connected to the clock pins on the first laser driver chip 120 and the second laser driver chip 130.

[0072] Table 1 Gold Finger Pin Definition Table

[0073]

[0074]

[0075] Figure 8 Shows the interconnection relationship between two dual-plane switches 200 through two dual-channel optical modules 100. It is defined that the MAC1 of the dual-plane switch 200 is responsible for the encoding, packaging, and forwarding of Service 1, and the MAC2 is responsible for the encoding, packaging, and forwarding of Service 2. The sending and receiving of Service 1 are represented by solid-line arrows, and the sending and receiving of Service 2 are represented by dashed-line arrows.

[0076] The service flow is as follows:

[0077] Service One - Electrical Signal Transmission: A dual - channel optical module 100 is inserted into the gold - finger socket of the dual - plane switch 200. The electrical signal is sent from the MAC1 chip to the TX1 pin pair on the gold - finger socket. The TX1 pin pair of the gold - finger socket and the TX1 of the dual - channel optical module 100 are in an interconnected relationship. The electrical signal is sent to the TX1 pin pair of the gold - finger of the dual - channel optical module 100, and then reaches the first laser driver chip 120. Through the electrical channel between the first laser driver chip 120 and the first optical transceiver module 140, it reaches the first optical transceiver module 140. The laser chip inside the first optical transceiver module 140 converts the electrical signal into an optical signal, and through the optical fiber of the first optical interface, it reaches the second optical interface of the dual - channel optical module 100 at the opposite end. The photodetector chip inside the second optical transceiver module 150 of the dual - channel optical module 100 at the opposite end converts the optical signal into an electrical signal, reaches the second laser driver chip 130. The second laser driver chip 130 is connected to the RX1 pin pair of the dual - channel optical module 100. The electrical signal reaches the RX1 pin pair of the gold - finger socket of the dual - plane switch 200 at the opposite end. The RX1 of the gold - finger socket and the MAC1 are in an electrical interconnection relationship, and the electrical signal reaches the MAC1 of the dual - plane switch 200 at the opposite end.

[0078] Service Two - Electrical Signal Transmission: A dual - channel optical module 100 is inserted into the gold - finger socket of the dual - plane switch 200. The electrical signal is sent from the MAC2 chip to the TX2 pin pair on the gold - finger socket. The TX2 pin pair of the gold - finger socket and the TX2 of the dual - channel optical module 100 are in an interconnected relationship. The electrical signal is sent to the TX2 pin pair of the gold - finger of the dual - channel optical module 100, and then reaches the second laser driver chip 130. Through the electrical channel between the second laser driver chip 130 and the second optical transceiver module 150, it reaches the second optical transceiver module 150. The laser chip inside the second optical transceiver module 150 converts the electrical signal into an optical signal, and through the optical fiber of the second optical interface, it reaches the first optical interface of the dual - channel optical module 100 at the opposite end. The photodetector chip inside the first optical transceiver module 140 of the dual - channel optical module 100 at the opposite end converts the optical signal into an electrical signal, reaches the first laser driver chip 120. The first laser driver chip 120 is connected to the RX2 pin pair of the dual - channel optical module 100. The electrical signal reaches the RX2 pin pair of the gold - finger socket of the dual - plane switch 200 at the opposite end. The RX2 of the gold - finger socket and the MAC2 are in an electrical interconnection relationship, and the electrical signal reaches the MAC2 of the dual - plane switch 200 at the opposite end.

[0079] Therefore, the dual - channel optical module 100 provided by the embodiments of the present invention, when used in cooperation with the dual - plane switch 200, can effectively isolate the dual services, and has the function of effectively preventing the wrong connection of the optical fiber interface 191, improving the system stability.

[0080] Second aspect, an embodiment of the present invention provides a dual-channel optical module 100, as Figure 11 shown, including: an optoelectronic conversion module N; the optoelectronic conversion module N is configured to receive a first transmitted electrical signal t1 sent by a first communication device and convert the first transmitted electrical signal t1 into a first transmitted optical signal T1, and receive a second transmitted electrical signal t2 and convert the second transmitted electrical signal t2 into a second transmitted optical signal T2, and send the first transmitted optical signal T1 and the second transmitted optical signal T2 to a second communication device, where the wavelength of the first transmitted optical signal T1 is different from the wavelength of the second transmitted optical signal T2; the optoelectronic conversion module N is further configured to receive a first received optical signal R1 sent by the second communication device and convert the first received optical signal R1 into a first received electrical signal r1, and receive a second received optical signal R2 sent by the second communication device and convert the second received optical signal R2 into a second received electrical signal r2, and send the first received electrical signal r1 and the second received electrical signal r2 to the first communication device; the wavelength of the first received optical signal R1 is different from the wavelength of the second received optical signal R2; the wavelength of the first transmitted optical signal T1 is the same as the wavelength of the first received optical signal R1, and the wavelength of the second transmitted optical signal T2 is the same as the wavelength of the second received optical signal R2. Exemplarily, the wavelengths of the first transmitted optical signal T1 and the first received optical signal R1 are both λ1; the wavelengths of the second transmitted optical signal T2 and the second received optical signal R2 are both λ2, and the values of λ1 and λ2 are different.

[0081] As Figure 11 shown, the first transmitted electrical signal t1 and the first received electrical signal r1 are both represented by solid lines, and the arrow indicates the transmission direction of the optical signal. The second transmitted electrical signal t2 and the second received electrical signal r2 are both represented by dashed lines, and the arrow indicates the transmission direction of the optical signal. The first transmitted optical signal T1 and the first received optical signal R1 are both represented by solid lines, and the arrow indicates the transmission direction of the optical signal. The second transmitted optical signal T2 and the second received optical signal R2 are both represented by dashed lines, and the arrow indicates the transmission direction of the optical signal. The optoelectronic conversion module N is connected to two single-fiber unidirectional optical fibers, where one optical fiber transmits the first transmitted optical signal T1 and the second transmitted optical signal T2, and the other optical fiber transmits the first received optical signal R1 and the second received optical signal R2. It can be understood that the wavelength of the first transmitted optical signal T1 is different from the wavelength of the second transmitted optical signal T2 and can be transmitted in the same optical fiber; the wavelength of the second received optical signal R2 is different from the wavelength of the first received optical signal R1 and can be transmitted in the same optical fiber.

[0082] As Figure 12 shown, when the dual-plane switch 200 realizes hard isolation of two types of services through interconnection of two such dual-channel optical modules 100, it is defined that Figure 12The dual-plane switch 200 on the left in the [description] is the first dual-plane switch 200, and the dual-channel optical module 100 inserted into the first dual-plane switch 200 is the first dual-channel optical module 100; it is defined that Figure 12 The dual-plane switch 200 on the right in the [description] is the second dual-plane switch 200, and the dual-channel optical module 100 inserted into the second dual-plane switch 200 is the second dual-channel optical module 100. One end of the first dual-plane switch 200 is connected to one end of the first dual-channel optical module 100. The other end of the first dual-channel optical module 100 is connected to an optical fiber through an optoelectronic conversion module and is connected to the optoelectronic conversion module of the second dual-channel optical module 100. The other end of the second dual-channel optical module 100 is connected to the second dual-plane switch 200. The first transmitted electrical signal t1 of the first type of service of the first dual-plane switch 200 is converted into a first transmitted optical signal T1 by the optoelectronic conversion module in the first dual-channel optical module 100. The first transmitted optical signal T1 is transmitted through the optical fiber to the second dual-channel optical module 100 and is converted into a first received electrical signal r1 by the optoelectronic conversion module in the second dual-channel optical module 100 and then transmitted to the second dual-plane switch 200. The first transmitted electrical signal t1 of the first type of service of the second dual-plane switch 200 is converted into a first transmitted optical signal T1 by the optoelectronic conversion module in the second dual-channel optical module 100. The first transmitted optical signal T1 is transmitted through the optical fiber to the first dual-channel optical module 100 and is converted into a first received electrical signal r1 by the optoelectronic conversion module in the first dual-channel optical module 100 and then transmitted to the first dual-plane switch 200. The second transmitted electrical signal t2 of the second type of service of the first dual-plane switch 200 is converted into a second transmitted optical signal T2 by the optoelectronic conversion module in the first dual-channel optical module 100. The second transmitted optical signal T2 is transmitted through the optical fiber to the second dual-channel optical module 100 and is converted into a second received electrical signal r2 by the optoelectronic conversion module in the second dual-channel optical module 100 and then transmitted to the second dual-plane switch 200. The second transmitted electrical signal t2 of the second type of service of the second dual-plane switch 200 is converted into a second transmitted optical signal T2 by the optoelectronic conversion module in the second dual-channel optical module 100. The second transmitted optical signal T2 is transmitted through the optical fiber to the first dual-channel optical module 100 and is converted into a second received electrical signal r2 by the optoelectronic conversion module in the first dual-channel optical module 100 and then transmitted to the first dual-plane switch 200. Thus, hard isolation of two types of services that need to be isolated is achieved on one switch.

[0083] It can be understood that optical signals with different wavelengths can be transmitted in one optical fiber. For example: Figure 11As shown, in the dual-channel optical module 100, the wavelength λ1 of the first transmitted optical signal T1 is different from the wavelength λ2 of the second transmitted optical signal T2, and they can be transmitted in the same optical fiber; the wavelength λ1 of the first received optical signal R1 is different from the wavelength λ2 of the second received optical signal R2, and they can also be transmitted in the same optical fiber. Therefore, when the first transmitted optical signal T1 and the second transmitted optical signal T2 in the dual-channel optical module 100 are transmitted in the same optical fiber, the first received optical signal R1 and the second received optical signal R2 are transmitted in the same optical fiber, as Figure 11 shown. In this case, when two dual-channel optical modules 100 are interconnected, if the optical fiber interface 191 is connected wrongly, the wavelengths of the transmitted optical signal and the received optical signal transmitted in the same optical fiber are the same. Since the transmitted optical signal and the received optical signal with the same wavelength in the opposite transmission directions will interfere and cancel each other out, resulting in signal interruption, the problem can be detected in time, achieving the effect of effectively preventing the wrong connection of the optical fiber interface 191.

[0084] In some embodiments, as Figure 11 and Figure 12 shown, the dual-channel optical module further includes an electrical interface 110 and a laser driver module M; the dual-channel optical module is connected to a communication device such as a dual-plane switch through the electrical interface 110, and the optoelectronic conversion module N is connected to the electrical interface 110 through the laser driver module M; the laser driver module M is configured to receive the first transmitted electrical signal t1 and the second transmitted electrical signal t2 sent by the first communication device through the electrical interface 110, and transmit the first transmitted electrical signal t1 and the second transmitted electrical signal t2 to the optoelectronic conversion module N; the laser driver module M is further configured to receive the first received electrical signal r1 and the second received electrical signal r2, and send the first received electrical signal r1 and the second received electrical signal r2 to the first communication device through the electrical interface 110.

[0085] In some embodiments, the optoelectronic conversion module includes an optical engine transmitting component 160 and an optical engine receiving component 170; wherein: the optical engine transmitting component 160 includes a third optical interface, and the third optical interface is configured to transmit the first transmitted optical signal T1 and the second transmitted optical signal T2; the optical engine receiving component 170 includes a fourth optical interface, and the fourth optical interface is configured to receive the first received optical signal R1 and the second received optical signal R2.

[0086] In a possible implementation manner, as Figure 11As shown in the figure, the optoelectronic conversion module includes an optical engine transmitting component 160 and an optical engine receiving component 170. The optical engine transmitting component 160 includes a first optical transmitter 161, a second optical transmitter 162, and a multiplexer 163 (abbreviated as MUX); the optical engine receiving component 170 includes a first optical receiver 171, a second optical receiver 172, and a demultiplexer 173 (abbreviated as DeMUX). Of course, it can also be understood that the optical engine transmitting component 160 includes two transmitter optical subassemblies (TOSA) and a multiplexer 163. The transmitted optical signal wavelengths of the two transmitter optical subassemblies are different. Exemplarily, the wavelength of the optical signal transmitted by TOSA1 is λ1, and the wavelength of the optical signal transmitted by TOSA2 is λ2. The function of the MUX is to combine the optical signals with central wavelengths of λ1 and λ2 and transmit them in a single optical fiber. The optical engine receiving component 170 includes two receiver optical subassemblies (ROSA) and a demultiplexer 173. The received optical signal wavelengths of the two receiver optical subassemblies are different. Exemplarily, the wavelength of the optical signal received by ROSA1 is λ1, and the wavelength of the optical signal received by ROSA2 is λ2. The function of the DeMUX is to separate the optical signal in the optical fiber according to wavelengths λ1 and λ2.

[0087] In some embodiments, the dual-channel optical module 100 further includes a housing 190. The laser driver module and the optoelectronic conversion module are accommodated in the housing 190; the electrical interface 110 is disposed on a side of the housing 190 away from the optoelectronic conversion module, and the third optical interface and the fourth optical interface are disposed on the same side of the housing 190 and are both located at an end facing away from the electrical interface 110.

[0088] Continue to refer to Figure 11 , for the dual-channel optical module 100 provided in this embodiment, one optical fiber interface 191 is provided corresponding to the optical engine transmitting component 160, and another optical fiber interface 191 is provided corresponding to the optical engine receiving component 170. The optical fiber interface 191 is a single-fiber unidirectional Lucent connector (abbreviated as LC) optical interface. That is to say, the optical fiber interface 191 corresponding to the optical engine transmitting component 160 is a transmitting port 191c, and the optical fiber interface 191 corresponding to the optical engine receiving component 170 is a receiving port 191d.

[0089] In some embodiments, the electrical interface 110 includes a first transmit pin pair TX1, a second transmit pin pair TX2, a first receive pin pair RX1, and a second receive pin pair RX2; the laser driver module includes a first laser driver chip 120 and a second laser driver chip 130; the optical engine transmit component 160 further includes a fifth electrical signal interface and a sixth electrical signal interface; the optical engine receive component 170 further includes a seventh electrical signal interface and an eighth electrical signal interface; the first transmit pin pair TX1 is connected to the fifth electrical signal interface through the first laser driver chip 120 to form a first electrical transmission channel; the seventh electrical signal interface is connected to the first receive pin pair RX1 through the first laser driver chip 120 to form a first electrical reception channel; the second transmit pin pair TX2 is connected to the sixth electrical signal interface through the second laser driver chip 130 to form a second electrical transmission channel; the eighth electrical signal interface is connected to the second receive pin pair RX2 through the second laser driver chip 130 to form a second electrical reception channel.

[0090] It should be noted that both of the two optical receive sub-modules in the optical engine receive component 170 include a TIA, and the TIA is used in cooperation with a photodetector. The photodetector converts an optical signal into a current signal, and the TIA processes the current signal into a voltage signal with a certain amplitude. Both the first laser driver chip 120 and the second laser driver chip 130 contain an LA; the output amplitude of the TIA will change with the change of the received optical power, and the function of the LA is to process the changing output amplitude into an electrical signal with an equal amplitude.

[0091] As Figure 11 shown, the first transmit pin pair TX1 is connected to the fifth electrical signal interface through the first laser driver chip 120 to form a first electrical transmission channel; the seventh electrical signal interface is connected to the first receive pin pair RX1 through the first laser driver chip 120 to form a first electrical reception channel; the first electrical transmission channel t1 and the first electrical reception channel form an electrical signal channel of service one in the dual-channel optical module 100, as Figure 11 shown by the arrow of the solid line in the figure. The second transmit pin pair TX2 is connected to the sixth electrical signal interface through the second laser driver chip 130 to form a second electrical transmission channel; the eighth electrical signal interface is connected to the second receive pin pair RX2 through the second laser driver chip 130 to form a second electrical reception channel; the second electrical transmission channel t2 and the second electrical reception channel form an electrical signal channel of service two in the dual-channel optical module 100, as Figure 11 shown by the arrow of the dashed line in the figure. The electrical signals of service one and the electrical signals of service two are transmitted through two independent channels respectively, realizing the hard isolation of services.

[0092] In some embodiments, the dual-channel optical module 100 further includes a circuit board. The first transmit pin pair TX1 and the first laser driver chip 120 are connected through the fifth trace of the circuit board; the first receive pin pair RX1 and the first laser driver chip 120 are connected through the sixth trace of the circuit board; the second transmit pin pair TX2 and the second laser driver chip 130 are connected through the seventh trace of the circuit board; the second receive pin pair RX2 and the second laser driver chip 130 are connected through the eighth trace of the circuit board.

[0093] In some embodiments, the first laser driver chip 120 and the fifth electrical signal interface are connected through the ninth trace of the circuit board; the seventh electrical signal interface and the first laser driver chip 120 are connected through the tenth trace of the circuit board; the second laser driver chip 130 and the sixth electrical signal interface are connected through the eleventh trace of the circuit board; the eighth electrical signal interface and the second laser driver chip 130 are connected through the twelfth trace of the circuit board; wherein the orthographic projection of the tenth trace on the circuit board and the orthographic projection of the eleventh trace on the circuit board have an overlapping area.

[0094] In a possible implementation, the dual-channel optical module 100 further includes a circuit board. The laser driver module and the optoelectronic conversion module are both integrated on the circuit board, and the circuit board is connected to the electrical interface 110 through traces. Specifically, as Figure 11 shown, the first transmit pin pair TX1 and the first laser driver chip 120 are connected through the fifth trace of the circuit board; the first laser driver chip 120 and the fifth electrical signal interface are connected through the ninth trace of the circuit board; the first receive pin pair RX1 and the first laser driver chip 120 are connected through the sixth trace of the circuit board; the seventh electrical signal interface and the first laser driver chip 120 are connected through the tenth trace of the circuit board; the second laser driver chip 130 and the sixth electrical signal interface are connected through the eleventh trace of the circuit board; the second transmit pin pair TX2 and the second laser driver chip 130 are connected through the seventh trace of the circuit board; the eighth electrical signal interface and the second laser driver chip 130 are connected through the twelfth trace of the circuit board; the second receive pin pair RX2 and the first laser driver chip 120 are connected through the eighth trace of the circuit board; wherein the orthographic projection of the sixth trace on the circuit board and the orthographic projection of the seventh trace on the circuit board have an overlapping area, and the orthographic projection of the tenth trace on the circuit board and the orthographic projection of the eleventh trace on the circuit board have an overlapping area, that is, the RX1 and TX2 signal lines of the two channels are crossed.

[0095] The purpose of such a setting is described in detail below:

[0096] As Figure 12As shown in the figure, two dual-plane switches 200 of the same type are interconnected through two dual-channel optical modules 100 of the same type. The dual-plane switch 200 includes two multiplier-accumulator chips (MultiplierAccumulator Chip, abbreviated as MAC), namely MAC1 and MAC2, which process two different services respectively. Exemplarily, MAC1 processes service one and MAC2 processes service two. That is to say, the data sent by MAC1 on the left must finally return to MAC1 on the right, and the data sent by MAC2 on the left must also finally return to MAC2 on the right, and vice versa. The MAC1 of the dual-plane switch 200 is electrically interconnected with the service one electrical signal channel of the dual-channel optical module 100, and the MAC2 is electrically interconnected with the service two electrical signal channel of the dual-channel optical module 100. After the dual-channel optical module 100 is inserted into the dual-plane switch 200, during normal use, the two dual-channel optical modules 100 are optically interconnected, and the transmitting port 191c must be connected to the receiving port 191d of the opposite end, otherwise the optical link is not working. The information sent by MAC1 of the left dual-plane switch 200 will reach the service two electrical signal channel of the dual-channel optical module 100 of the opposite end, and the service two electrical signal channel of the dual-channel optical module 100 of the opposite end is electrically interconnected with MAC2 of the dual-plane switch 200 of the opposite end. If the RX signal line of the dual-channel optical module 100 does not cross-wire, the information sent by MAC1 of the left dual-plane switch 200 will finally reach MAC2 of the dual-plane switch 200 of the opposite end, which is equivalent to MAC1 on the left sending and MAC2 on the right receiving, and the two types of services cross channels, resulting in cross between the two types of services and making it impossible to achieve hard isolation of services.

[0097] It should also be noted that since the up and down positions of the two MACs in the dual-plane switch 200 are fixed, for example, if the left dual-plane switch 200 is moved to the right, the positions of the MAC chips will be reversed, that is, MAC2 is on the top and MAC1 is on the bottom, as specifically shown in Figure 12 the figure. If the upper and lower MAC chips of the right dual-plane switch 200 are interchanged, that is, MAC1 is on the top and MAC2 is on the bottom, then the two left and right dual-plane switches 200 will be two different models, increasing the production and manufacturing cost of the switch. Therefore, when using two dual-plane switches 200 of the same model to be interconnected left and right through two dual-channel optical modules 100 of the same type, the RX1 and TX2 signal lines need to be cross-set. In addition, the cross-setting here is not a cross-connection, but a cross in space.

[0098] In some embodiments, the dual-channel optical module 100 further includes a controller 180. The controller 180 is signal-connected to the electrical interface 110 and the laser driver module, and is used to transmit control signals. When a chip of a communication device, such as a dual-plane switch, needs to access the dual-channel optical module, it is connected to the controller 180 of the dual-channel optical module through the electrical interface 110. At the same time, the controller 180 is connected to the laser driver module to achieve the transmission of control signals and complete the signal interaction between the communication device and the dual-channel optical module.

[0099] Referring to Figure 11 , the controller 180 is a single-chip microcomputer. The single-chip microcomputer is connected to the electrical interface 110 and is used to transmit communication control signals. At the same time, the single-chip microcomputer is respectively connected to the first laser driver chip 120 and the second laser driver chip 130.

[0100] In a possible implementation manner, the electrical interface 110 of the dual-channel optical module 100 is a gold finger electrical interface 110, which complies with the provisions of the CSFP MSA Option2 protocol. The CSFP MSA Option2 protocol specifies the electrical definition of the gold finger of the dual-channel optical module 100.

[0101] Figure 12 The relationship of two dual-plane switches 200 interconnected through two dual-channel optical modules 100 is shown. It is defined that the MAC1 of the dual-plane switch 200 is responsible for the encoding, packaging, and forwarding of service one, and the MAC2 is responsible for the encoding, packaging, and forwarding of service two. The sending and receiving of service one are represented by solid-line arrows, and the sending and receiving of service two are represented by dashed-line arrows.

[0102] The service flow is as follows:

[0103] Service One - Electrical Signal Transmission: A dual - channel optical module 100 is inserted into the gold - finger socket of the dual - plane switch 200. The electrical signal is sent from the MAC1 chip to the TX1 pin pair on the gold - finger socket. The TX1 pin pair of the gold - finger socket and the TX1 of the dual - channel optical module 100 are in an interconnected relationship. The electrical signal is sent to the TX1 pin pair of the gold - finger of the dual - channel optical module 100, and then reaches the first laser driver chip 120. Through the electrical channel between the first laser driver chip 120 and the first optical transmitter 161, it reaches the first optical transmitter 161. The laser diode in the first optical transmitter 161 converts the electrical signal into an optical signal, and through the optical fiber of the transmitting port 191c, it reaches the receiving port 191d of the dual - channel optical module 100 at the opposite end. The photodiode in the first optical receiver 171 of the dual - channel optical module 100 at the opposite end converts the optical signal into an electrical signal, reaches the first laser driver chip 120. The first laser driver chip 120 is connected to the RX1 pin pair of the dual - channel optical module 100. The electrical signal reaches the RX1 pin pair of the gold - finger socket of the dual - plane switch 200 at the opposite end. The RX1 of the gold - finger socket and the MAC1 are in an electrical interconnection relationship, and the electrical signal reaches the MAC1 of the dual - plane switch 200 at the opposite end.

[0104] Service Two - Electrical Signal Transmission: A dual - channel optical module 100 is inserted into the gold - finger socket of the dual - plane switch 200. The electrical signal is sent from the MAC2 chip to the TX2 pin pair on the gold - finger socket. The TX2 pin pair of the gold - finger socket and the TX2 of the dual - channel optical module 100 are in an interconnected relationship. The electrical signal is sent to the TX2 pin pair of the gold - finger of the dual - channel optical module 100, and then reaches the second laser driver chip 130. Through the electrical channel between the second laser driver chip 130 and the second optical transmitter 162, it reaches the second optical transmitter 162. The laser diode in the second optical transmitter 162 converts the electrical signal into an optical signal, and through the optical fiber of the transmitting port 191c, it reaches the receiving port 191d of the dual - channel optical module 100 at the opposite end. The photodiode in the second optical receiver 172 of the dual - channel optical module 100 at the opposite end converts the optical signal into an electrical signal, reaches the second laser driver chip 130. The second laser driver chip 130 is connected to the RX2 pin pair of the dual - channel optical module 100. The electrical signal reaches the RX2 pin pair of the gold - finger socket of the dual - plane switch 200 at the opposite end. The RX2 of the gold - finger socket and the MAC2 are in an electrical interconnection relationship, and the electrical signal reaches the MAC2 of the dual - plane switch 200 at the opposite end.

[0105] Therefore, the dual - channel optical module 100 provided by the embodiments of the present invention, when used in conjunction with the dual - plane switch 200, can effectively isolate dual services, and has the function of effectively preventing incorrect connection of the optical fiber interface 191, improving the system stability.

[0106] In a third aspect, an embodiment of the present invention further provides a dual-plane switch, including any one of the dual-channel optical modules in the embodiments of the first aspect.

[0107] In a fourth aspect, an embodiment of the present invention further provides a dual-plane switch, including any one of the dual-channel optical modules in the embodiments of the second aspect.

[0108] It should be noted that the dual-plane switch can be designed in a style with a single dual-channel optical module slot or in a style with multiple dual-channel optical module slots. Figure 13 FIG. [FIGURE NUMBER] is a functional block diagram of a dual-plane switch with multiple dual-channel optical module slots. As Figure 13 shown, the socket in the dual-plane switch 200 can be a gold finger electrical connector socket. Exemplarily, the socket in the dual-plane switch is a 20-pin gold finger electrical connector socket.

[0109] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications. Please note that in the translation of , the [FIGURE NUMBER] should be replaced with the actual figure number in the original text. Since it's not provided in the given content, it remains as [FIGURE NUMBER] here.

Claims

1. A dual-channel optical module, characterized in that, Comprising: A photoelectric conversion module; The photoelectric conversion module is configured to receive a first transmission electrical signal sent by a first communication device and convert the first transmission electrical signal into a first transmitted optical signal, and receive a second transmission electrical signal sent by the first communication device and convert the second transmission electrical signal into a second transmitted optical signal, and send the first transmitted optical signal and the second transmitted optical signal to a second communication device, wherein the wavelength of the first transmitted optical signal is different from the wavelength of the second transmitted optical signal; The photoelectric conversion module is further configured to receive a first received optical signal sent by the second communication device and convert the first received optical signal into a first received electrical signal, and receive a second received optical signal sent by the second communication device and convert the second received optical signal into a second received electrical signal, and send the first received electrical signal and the second received electrical signal to the first communication device; the wavelength of the first received optical signal is different from the wavelength of the second received optical signal; the wavelength of the first transmitted optical signal is the same as the wavelength of the first received optical signal, and the wavelength of the second transmitted optical signal is the same as the wavelength of the second received optical signal.

2. The dual-channel optical module according to claim 1, wherein The dual-channel optical module further includes an electrical interface and a laser driver module; the photoelectric conversion module is connected to the electrical interface through the laser driver module; The laser driver module is configured to receive the first transmission electrical signal and the second transmission electrical signal sent by the first communication device through the electrical interface, and transmit the first transmission electrical signal and the second transmission electrical signal to the photoelectric conversion module; The laser driver module is further configured to receive the first received electrical signal and the second received electrical signal, and send the first received electrical signal and the second received electrical signal to the first communication device through the electrical interface.

3. The dual-channel optical module according to claim 2, wherein The photoelectric conversion module includes a first optical transmitting and receiving component and a second optical transmitting and receiving component; The first optical transmitting and receiving component includes a first optical interface; the first optical interface is used to send the first transmitted optical signal and is also used to receive the second received optical signal; The second optical transmitting and receiving component includes a second optical interface; the second optical interface is used to send the second transmitted optical signal and is also used to receive the first received optical signal.

4. The dual-channel optical module according to claim 3, wherein The electrical interface includes a first transmission pin pair, a second transmission pin pair, a first reception pin pair and a second reception pin pair; the laser driver module includes a first laser driver chip and a second laser driver chip; The first optical transmitting and receiving component further includes a first electrical signal interface and a second electrical signal interface; the second optical transmitting and receiving component further includes a third electrical signal interface and a fourth electrical signal interface; The first transmission pin pair is connected to the first electrical signal interface through the first laser driver chip to form a first electrical transmission channel; the fourth electrical signal interface is connected to the first reception pin pair through the second laser driver chip to form a first electrical reception channel; The second transmission pin pair is connected to the third electrical signal interface through the second laser driver chip to form a second electrical transmission channel; The second electrical signal interface forms a second electrical receiving channel with the second receiving pin pair through the first laser driver chip.

5. The dual-channel optical module according to claim 4, wherein The dual-channel optical module further includes a circuit board. The first transmitting pin pair is connected to the first laser driver chip through a first trace of the circuit board; the first receiving pin pair is connected to the second laser driver chip through a second trace of the circuit board; the second transmitting pin pair is connected to the second laser driver chip through a third trace of the circuit board; the second receiving pin pair is connected to the first laser driver chip through a fourth trace of the circuit board; wherein the orthographic projection of the second trace on the circuit board and the orthographic projection of the fourth trace on the circuit board have an overlapping area.

6. The dual-channel optical module according to claim 2, wherein The optoelectronic conversion module includes an optical engine transmitting component and an optical engine receiving component; wherein: The optical engine transmitting component includes a third optical interface for transmitting the first transmitted optical signal and the second transmitted optical signal. The optical engine receiving component includes a fourth optical interface for receiving the first received optical signal and the second received optical signal.

7. The dual-channel optical module according to claim 6, characterized in that, The electrical interface includes a first transmitting pin pair, a first receiving pin pair, a second transmitting pin pair, and a second receiving pin pair; the laser driver module includes a first laser driver chip and a second laser driver chip. The optical engine transmitting component further includes a fifth electrical signal interface and a sixth electrical signal interface; the optical engine receiving component further includes a seventh electrical signal interface and an eighth electrical signal interface. The first transmitting pin pair forms a first electrical transmission channel with the fifth electrical signal interface through the first laser driver chip. The seventh electrical signal interface forms a first electrical receiving channel with the first receiving pin pair through the first laser driver chip. The second transmitting pin pair forms a second electrical transmission channel with the sixth electrical signal interface through the second laser driver chip. The eighth electrical signal interface forms a second electrical receiving channel with the second receiving pin pair through the second laser driver chip.

8. The dual-channel optical module according to claim 7, wherein The dual-channel optical module further includes a circuit board. The first transmitting pin pair is connected to the first laser driver chip through a fifth trace of the circuit board; the first receiving pin pair is connected to the first laser driver chip through a sixth trace of the circuit board; the second transmitting pin pair is connected to the second laser driver chip through a seventh trace of the circuit board; the second receiving pin pair is connected to the second laser driver chip through an eighth trace of the circuit board.

9. The dual-channel optical module according to claim 8, wherein The first laser driver chip is connected to the fifth electrical signal interface through a ninth trace of the circuit board; the seventh electrical signal interface is connected to the first laser driver chip through a tenth trace of the circuit board. The second laser driver chip is connected to the sixth electrical signal interface through an eleventh trace of the circuit board; the eighth electrical signal interface is connected to the second laser driver chip through a twelfth trace of the circuit board. The orthographic projection of the tenth trace on the circuit board intersects with the orthographic projection of the eleventh trace on the circuit board in a crossing area.

10. The dual-channel optical module according to any one of claims 2-9, characterized in that, The dual-channel optical module further includes a controller, which is signal-connected to the electrical interface and the laser driver module for transmitting control signals.

11. The dual-channel optical module according to any one of claims 2-9, characterized in that, The dual-channel optical module further includes a housing, in which the laser driver module and the optoelectronic conversion module are accommodated; the electrical interface is disposed on a side of the housing away from the optoelectronic conversion module.

12. A dual-plane switch, characterized in that, It includes the dual-channel optical module according to any one of claims 1-11.

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