Optical path device and detection method capable of supporting transmission of multiple functional optical amplifiers

Abstract

The present application relates to optical path device technical field, specifically to optical path device and detection method which can support multiple function optical amplifier transmission, including first wavelength division multiplexer, second wavelength division multiplexer, first optical fiber coupler, second optical fiber coupler, third optical fiber coupler, optical combiner, optoelectronic converter, optical switch, optical circulator and control processing circuit; OSC signal and service signal are separated and enter the receiver of OSC, OSC signal enters from OSC1 port of optical path device, and after first wavelength division multiplexer, first optical fiber coupler and first optical detector, input light is detected, and through control processing circuit and external password, optical switch connects optoelectronic converter to optical circulator, and OSC signal light is output through OSC3, and whether the passage is normal is judged, the optical path device can support the need of different function optical amplifier OSC transmission, can be applied to the rapid layout of system, and is beneficial to the opening of DWDM system in emergency or disaster situation.

Description

Technical Field

[0001] The present invention relates to the technical field of optical path devices, and in particular to an optical path device capable of supporting transmission of optical amplifiers with multiple functions and a detection method. Background Art

[0002] In a dense wavelength division multiplexing (DWDM) system, OSC is mainly responsible for transmitting management signals, monitoring system status, physical layer transmission, and connecting to upper-layer management systems.

[0003] Currently, DWDM system links are primarily distributed between the transmitter (optical power amplifier output), the optical relay, and the receiver (optical preamplifier reception). Because the OSCs in various parts of existing DWDM systems function differently, the optical paths in different parts of the link are different. Therefore, in emergencies or disasters, the OSCs cannot be replaced. Summary of the Invention

[0004] The purpose of the present invention is to provide an optical path device and a detection method that can support the transmission of optical amplifiers with multiple functions, aiming to solve the problem that conventional OSC transmission optical paths cannot be replaced.

[0005] To achieve the above objectives, in a first aspect, the present invention provides an optical path device that can support transmission of multiple functional optical amplifiers, including a first wavelength division multiplexer, a second wavelength division multiplexer, a first fiber coupler, a second fiber coupler, a third fiber coupler, an optical combiner, an optoelectronic optical converter, an optical switch, an optical circulator, and a control processing circuit; the first wavelength division multiplexer, the first fiber coupler, the optical combiner, the optoelectronic optical converter, the optical switch, and the second wavelength division multiplexer are connected in sequence, the optical circulator is connected to the optical combiner, the optical switch, and the second fiber coupler, respectively, and the third fiber coupler is connected to the second fiber coupler.

[0006] Among them, the first wavelength division multiplexer and the second wavelength division multiplexer are both 3-port structures, the operating wavelength is 1550nm / 1510nm, the bandwidth of the 1550nm wavelength port is ≥40nm, the bandwidth of the 1510nm wavelength port is 20nm, and both the 1550 wavelength port and the 1510 wavelength port can select a reflection end or a transmission end, and both use single-mode optical fiber.

[0007] The first fiber coupler, the second fiber coupler, and the third fiber coupler are all 3-port structures with an operating wavelength of 1510±20 nm, a splitting ratio of 1 / 99, and single-mode optical fibers are used at the ports.

[0008] Among them, the optical path device that can support transmission of multiple functional optical amplifiers also includes a first optical detector, a second optical detector and a third optical detector. The first optical detector is connected to the first optical fiber coupler, the second optical detector is connected to the second optical fiber coupler, and the third optical detector is connected to the third optical fiber coupler.

[0009] In a second aspect, the present invention further provides an optical path detection method capable of supporting the transmission of OSCs by optical amplifiers with multiple functions, such as the optical path device capable of supporting the transmission of optical amplifiers with multiple functions as described in the first aspect, comprising the following steps:

[0010] At the transmitting end of the link, the OSC signal is coupled into the transmission optical fiber. The OSC signal enters the optical path device from the OSC3 port, and is detected by the first optical fiber coupler, the second optical fiber coupler, and the third optical fiber coupler. The optical switch connects the optoelectronic converter to the second wavelength division multiplexer through the control processing circuit. The OSC signal light is output together with the service optical signal of the EDFA through OSC2.

[0011] At the relay end of the link, the OSC signal is separated from the service signal and optically relayed before being coupled into the transmission optical fiber for transmission. The OSC signal enters the OSC1 port of the optical path device, passes through the first wavelength division multiplexer, the first fiber coupler, and the first optical detector to detect the input light. Through the control processing circuit, the optical switch connects the optoelectronic converter to the second wavelength division multiplexer, and the OSC signal light is output together with the service optical signal of the EDFA through OSC2.

[0012] At the receiving end of the link, the OSC signal is separated from the service signal and enters the OSC receiver. The OSC signal enters from the OSC1 port of the optical path device, and then passes through the first wavelength division multiplexer, the first fiber coupler and the first optical detector to detect the input light. Through the control processing circuit and the external command, the optical switch will connect the optoelectronic converter to the optical circulator, and the OSC signal light will be output through OSC3. The power of the output signal is detected by the third optical detector to determine whether the path is normal.

[0013] The optical path device of the present invention can support the transmission of multiple functional optical amplifiers. When it is at the transmitting end of the link, the OSC signal is coupled into the transmission optical fiber. The OSC signal enters the OSC3 port of the optical path device, and detects the presence of input light through the first optical fiber coupler, the second optical fiber coupler, and the third optical fiber coupler. Through the control processing circuit, the optical switch connects the optoelectronic optical converter to the second wavelength division multiplexer, and the OSC signal light is output together with the service optical signal of the EDFA through OSC2. When it is at the relay end of the link, the OSC signal is separated from the service signal, and then optically relayed and coupled into the transmission optical fiber for transmission together. The OSC signal enters the OSC1 port of the optical path device, and detects the presence of input light through the first wavelength division multiplexer, the first optical fiber coupler, and the first optical detector. Through the control processing circuit, the optical switch connects the optoelectronic optical converter to the second wavelength division multiplexer. The optical-to-electrical converter is connected to the second wavelength division multiplexer, and the OSC signal light is output together with the service optical signal of the EDFA through OSC2. When at the receiving end of the link, the OSC signal is separated from the service signal and enters the OSC receiver. The OSC signal enters the OSC1 port of the optical path device, and then passes through the first wavelength division multiplexer, the first fiber coupler, and the first optical detector to detect the input light. Through the control processing circuit and external command, the optical switch will connect the optical-to-electrical converter to the optical circulator, and the OSC signal light is output through OSC3. The power of the output signal is detected by the third optical detector to determine whether the path is normal. The optical path device uses one optical combiner (COUPLER), one optical switch (OSW), and the optical circulator (CIR) to form an isolated and effective optical path. Calculations show that the device's insertion loss is less than 1dB when outputting OSC signals, which is comparable to the loss caused by using separate OSC optical paths at different locations. Furthermore, the device can support the OSC transmission needs of optical amplifiers with different functions, enabling rapid deployment of systems and facilitating the commissioning of DWDM systems in emergency or disaster situations. This solves the issue of conventional OSC transmission optical paths being irreplaceable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a connection diagram of an optical path device provided by the present invention that can support transmission of optical amplifiers with multiple functions.

[0016] Figure 2This is a flow chart of the optical path detection method provided by the present invention that can support transmission of optical amplifiers with multiple functions.

[0017] In the figure: 1-first wavelength division multiplexer, 2-second wavelength division multiplexer, 3-first optical fiber coupler, 4-second optical fiber coupler, 5-third optical fiber coupler, 6-optical combiner, 7-photoelectric optical converter, 8-optical switch, 9-optical circulator, 10-control processing circuit, 11-first optical detector, 12-second optical detector, 13-third optical detector. DETAILED DESCRIPTION

[0018] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0019] See also Figure 1 In a first aspect, the present invention provides an optical path device that can support transmission of multiple functional optical amplifiers, including a first wavelength division multiplexer 1, a second wavelength division multiplexer 2, a first fiber coupler 3, a second fiber coupler 4, a third fiber coupler 5, an optical combiner 6, an optoelectronic converter 7, an optical switch 8, an optical circulator 9 and a control processing circuit 10; the first wavelength division multiplexer 1, the first fiber coupler 3, the optical combiner 6, the optoelectronic converter 7, the optical switch 8 and the second wavelength division multiplexer 2 are connected in sequence, the optical circulator 9 is respectively connected to the optical combiner 6, the optical switch 8 and the second fiber coupler 4, and the third fiber coupler 5 is connected to the second fiber coupler 4.

[0020] In an embodiment of the present invention, when at the transmitting end of the link, the OSC signal is coupled into the transmission optical fiber, and the OSC signal enters from the OSC3 port of the optical path device. After passing through the first optical fiber coupler 3, the second optical fiber coupler 4, and the third optical fiber coupler 5, the input light is detected. Through the control processing circuit 10, the optical switch 8 connects the optoelectronic optical converter 7 to the second wavelength division multiplexer 2, and the OSC signal light is output together with the service optical signal of the EDFA through OSC2. When at the relay end of the link, the OSC signal is separated from the service signal, optically relayed, and then coupled into the transmission optical fiber for transmission together. The OSC signal enters from the OSC1 port of the optical path device, and after passing through the first wavelength division multiplexer 1, the first optical fiber coupler 3, and the first optical detector 11, the input light is detected. Through the control processing circuit 10, the optical switch 8 connects the optoelectronic optical converter 7 to the second wavelength division multiplexer 2, and the OSC signal light is output together with the EDFA service optical signal through OSC2; at the receiving end of the link, the OSC signal is separated from the service signal and enters the OSC receiver. The OSC signal enters the optical path device from the OSC1 port, and then passes through the first wavelength division multiplexer 1, the first fiber coupler 3, and the first optical detector 11 to detect the input light. Through the control processing circuit 10 and the external command, the optical switch 8 will connect the optoelectronic converter 7 to the optical circulator 9, and the OSC signal light is output through OSC3. The power of the output signal is detected by the third optical detector 13 to determine whether the path is normal. The optical path device uses one optical combiner 6 (COUPLER), one optical switch 8 (OSW), and the optical circulator 9 (CIR) to form an isolated and effective optical path. Calculations show that the device's insertion loss is less than 1dB when outputting OSC signals, which is comparable to the loss caused by using separate OSC optical paths at different locations. Furthermore, the device can support the OSC transmission needs of optical amplifiers with different functions, enabling rapid deployment of systems and facilitating the commissioning of DWDM systems in emergency or disaster situations. This solves the issue of conventional OSC transmission optical paths being irreplaceable.

[0021] Furthermore, the first wavelength division multiplexer 1 (WDM1) and the second wavelength division multiplexer 2 (WDM2) are both 3-port structures (1×2), with an operating wavelength of 1550nm / 1510nm, the bandwidth of the 1550nm wavelength port ≥40nm, the bandwidth of the 1510nm wavelength port is 20nm, and both the 1550nm wavelength port and the 1510nm wavelength port can be selected as a reflection end or a transmission end, which can be selected according to actual conditions, and both use single-mode optical fiber.

[0022] Furthermore, the first fiber coupler 3 (TAP1), the second fiber coupler 4 (TAP2) and the third fiber coupler 5 (TAP3) are all 3-port structures (1×2), with an operating wavelength of 1510±20nm, a splitting ratio of 1 / 99, and the ports use single-mode optical fibers.

[0023] Furthermore, the optical path device that can support transmission of multiple functional optical amplifiers also includes a first optical detector 11, a second optical detector 12 and a third optical detector 13. The first optical detector 11 is connected to the first optical fiber coupler 3, the second optical detector 12 is connected to the second optical fiber coupler 4, and the third optical detector 13 is connected to the third optical fiber coupler 5.

[0024] In the embodiment of the present invention, the first optical detector 11 (PIN1), the second optical detector 12 (PIN2) and the third optical detector 13 (PIN3) have an operating wavelength of 900nm to 1700nm, a responsivity of ≥0.85A / W, are coaxially packaged, and the pigtails are single-mode optical fibers.

[0025] Furthermore, the optical combiner 6 (COUPLER) has a 3-port structure (1×2), an operating wavelength of 1510±20nm, a splitting ratio of 50 / 50, and all ports use single-mode optical fiber. The optoelectronic optical converter 7 (OEO) uses a dedicated 1510nm band optical module, and can also be combined with a photodetector and an optical laser component. The optical switch 8 (OSW) can be a mechanical optical switch, a MEMS optical switch, or a magneto-optical switch, but is not limited to these types. The 1×2 optical switch has a switching time of ≤10ms, an insertion loss of ≤1dB, and a single-mode optical fiber pigtail. The optical circulator 9 (CIR) has 3 ports, an operating wavelength of 1550nm±20nm, an insertion loss of ≤0.8dB, an isolation of ≥50dB, and a single-mode optical fiber pigtail. The control processing circuit 10 can receive and execute external command information, detect the voltage of the optical detector, and quickly drive the optical switch 8.

[0026] See also Figure 2 In a second aspect, the present invention further provides an optical path detection method capable of supporting the transmission of OSCs by optical amplifiers with multiple functions, such as the optical path device capable of supporting the transmission of optical amplifiers with multiple functions as described in the first aspect, comprising the following steps:

[0027] When S1 is at the transmitting end of the link, it couples the OSC signal into the transmission optical fiber. The OSC signal enters the optical path device from the OSC3 port, and detects the input light through the first optical fiber coupler 3, the second optical fiber coupler 4, and the third optical fiber coupler 5. Through the control processing circuit 10, the optical switch 8 connects the optoelectronic converter 7 to the second wavelength division multiplexer 2. The OSC signal light is output together with the service optical signal of the EDFA through the OSC2.

[0028] In this embodiment of the present invention, the optical circulator 9 (CIR), the optical combiner 6 (COUPLER), the optoelectronic optical converter 7 (OEO), the optical switch 8 (OSW), and the second wavelength division multiplexer 2 (WDM2) form a path, and the OSC signal light is output from OSC2 together with the service optical signal of the EDFA through the path.

[0029] When S2 is at the relay end of the link, the OSC signal is separated from the service signal, optically relayed, and then coupled into the transmission fiber for transmission. The OSC signal enters the OSC1 port of the optical path device, passes through the first wavelength division multiplexer 1, the first fiber coupler 3, and the first optical detector 11 to detect the input light. Through the control processing circuit 10, the optical switch 8 connects the optoelectronic converter 7 to the second wavelength division multiplexer 2, and the OSC signal light is output together with the service optical signal of the EDFA through OSC2.

[0030] In this embodiment of the present invention, the optical combiner 6 (COUPLER), the optoelectronic optical converter 7 (OEO), the optical switch 8 (OSW), and the second wavelength division multiplexer 2 (WDM2) form a path, and the OSC signal light is output from OSC2 together with the EDFA service optical signal through the path.

[0031] When S3 is at the receiving end of the link, it separates the OSC signal from the service signal and enters the OSC receiver. The OSC signal enters the OSC1 port of the optical path device, then passes through the first wavelength division multiplexer 1, the first fiber coupler 3, and the first optical detector 11 to detect the input light. Through the control processing circuit 10 and the external command, the optical switch 8 will connect the optoelectronic converter 7 to the optical circulator 9. The OSC signal light is output through OSC3. The power of the output signal is detected by the third optical detector 13 to determine whether the path is normal.

[0032] In this embodiment of the present invention, the optical combiner 6 (COUPLER), the optoelectronic optical converter 7 (OEO), the optical switch 8 (OSW), and the optical circulator 9 (CIR) form a path. The OSC signal light passes through the path and is output from OSC3. The power of the signal is detected by the third optical detector 13 (PIN3) to determine whether the path is normal.

[0033] The above disclosure is merely a preferred embodiment of the optical path device and detection method of the present invention that can support transmission of multiple functional optical amplifiers. It is certainly not intended to limit the scope of the present invention. A person skilled in the art will understand that implementing all or part of the processes of the above embodiment and making equivalent changes in accordance with the claims of the present invention still fall within the scope of the invention.

Claims

1. An optical path device that can support the transmission of multiple functional optical amplifiers, It is characterized by: The optical fiber coupler comprises a first wavelength division multiplexer, a second wavelength division multiplexer, a first optical fiber coupler, a second optical fiber coupler, a third optical fiber coupler, an optical combiner, an optoelectronic converter, an optical switch, an optical circulator and a control processing circuit; The first wavelength division multiplexer, the first fiber coupler, the optical combiner, the optoelectronic converter, the optical switch, and the second wavelength division multiplexer are connected in sequence; the optical circulator is connected to the optical combiner, the optical switch, and the second fiber coupler, respectively; and the third fiber coupler is connected to the second fiber coupler; The optical path device capable of supporting transmission of multiple-function optical amplifiers further includes a first optical detector, a second optical detector, and a third optical detector, wherein the first optical detector is connected to the first optical fiber coupler, the second optical detector is connected to the second optical fiber coupler, and the third optical detector is connected to the third optical fiber coupler; At the transmitting end of the link, the OSC signal is coupled into the transmission optical fiber. The OSC signal enters the optical path device from the OSC3 port, and is detected by the first optical fiber coupler, the second optical fiber coupler, and the third optical fiber coupler. The optical switch connects the optoelectronic converter to the second wavelength division multiplexer through the control processing circuit. The OSC signal light is output together with the service optical signal of the EDFA through OSC2. At the relay end of the link, the OSC signal is separated from the service signal and optically relayed before being coupled into the transmission optical fiber for transmission. The OSC signal enters the OSC1 port of the optical path device, passes through the first wavelength division multiplexer, the first fiber coupler, and the first optical detector to detect the input light. Through the control processing circuit, the optical switch connects the optoelectronic converter to the second wavelength division multiplexer, and the OSC signal light is output together with the service optical signal of the EDFA through OSC2. At the receiving end of the link, the OSC signal is separated from the service signal and enters the OSC receiver. The OSC signal enters from the OSC1 port of the optical path device, and then passes through the first wavelength division multiplexer, the first fiber coupler and the first optical detector to detect the input light. Through the control processing circuit and the external command, the optical switch will connect the optoelectronic converter to the optical circulator, and the OSC signal light will be output through OSC3. The power of the output signal is detected by the third optical detector to determine whether the path is normal.

2. The optical path device capable of supporting transmission of optical amplifiers with multiple functions as claimed in claim 1, It is characterized by: The first wavelength division multiplexer and the second wavelength division multiplexer both have a three-port structure, with an operating wavelength of 1550nm / 1510nm, the bandwidth of the 1550nm wavelength port ≥40nm, the bandwidth of the 1510nm wavelength port is 20nm, and both the 1550nm wavelength port and the 1510nm wavelength port can select a reflection end or a transmission end, and both use single-mode optical fiber.

3. The optical path device capable of supporting transmission of optical amplifiers with multiple functions as claimed in claim 1, It is characterized by: The first optical fiber coupler, the second optical fiber coupler and the third optical fiber coupler are all 3-port structures, with an operating wavelength of 1510±20nm, a splitting ratio of 1 / 99, and single-mode optical fibers are used in the ports.

4. A method for detecting an optical path capable of supporting the transmission of an OSC by an optical amplifier having multiple functions, applied to an optical path device capable of supporting the transmission of an optical amplifier having multiple functions as claimed in any one of claims 1 to 3, characterized in that: The following steps are involved: At the transmitting end of the link, the OSC signal is coupled into the transmission optical fiber. The OSC signal enters the optical path device from the OSC3 port, and is detected by the first optical fiber coupler, the second optical fiber coupler, and the third optical fiber coupler. The optical switch connects the optoelectronic converter to the second wavelength division multiplexer through the control processing circuit. The OSC signal light is output together with the service optical signal of the EDFA through OSC2. At the relay end of the link, the OSC signal is separated from the service signal and optically relayed before being coupled into the transmission optical fiber for transmission. The OSC signal enters the OSC1 port of the optical path device, passes through the first wavelength division multiplexer, the first fiber coupler, and the first optical detector to detect the input light. Through the control processing circuit, the optical switch connects the optoelectronic converter to the second wavelength division multiplexer, and the OSC signal light is output together with the service optical signal of the EDFA through OSC2. At the receiving end of the link, the OSC signal is separated from the service signal and enters the OSC receiver. The OSC signal enters from the OSC1 port of the optical path device, and then passes through the first wavelength division multiplexer, the first fiber coupler and the first optical detector to detect the input light. Through the control processing circuit and the external command, the optical switch will connect the optoelectronic converter to the optical circulator, and the OSC signal light will be output through OSC3. The power of the output signal is detected by the third optical detector to determine whether the path is normal.

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