Optical receiving assembly, optical module, optical communication equipment and method for detecting extinction ratio of optical signal

Abstract

The embodiment of the invention provides an optical receiving assembly, an optical module, optical communication equipment and a method for detecting the extinction ratio of an optical signal, and relates to the technical field of optical communication, and the extinction ratio of the optical signal output by communication equipment of a transmitting end connected with the optical receiving assembly can be determined through the optical receiving assembly. The optical receiving assembly comprises a photoelectric converter, a current detection circuit, a trans-impedance amplifier, an electric receiving circuit and a calculation circuit, the input end of the calculation circuit is connected with the current output end of the current detection circuit, the gain control end of the trans-impedance amplifier, the voltage output end of the electric receiving circuit and the gain output end of the electric receiving circuit. And the calculation circuit is used for determining the extinction ratio according to the transimpedance gain received from the gain control end of the transimpedance amplifier, the direct current bias current received from the current output end of the current detection circuit, the voltage swing value received from the voltage output end of the power receiving circuit and the receiving gain value from the gain output end of the power receiving circuit.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical communication technology, and in particular to an optical receiving assembly, an optical module, an optical communication device, and a method for detecting an extinction ratio of an optical signal. BACKGROUND

[0002] An optical fiber communication system uses light as a carrier and uses an optical fiber as a transmission medium for communication. The optical fiber communication system usually includes two communication devices and a transmission optical fiber connecting the two communication devices. In a process of transmitting a signal once, one of the two communication devices is a communication device at a transmitting end, and the other is a communication device at a receiving end. The communication device at the transmitting end outputs an optical signal according to transmission data. The transmission optical fiber transmits the optical signal to the communication device at the receiving end. The communication device at the receiving end receives the optical signal to obtain the transmission data, thereby realizing communication.

[0003] The extinction ratio of the optical signal output by the communication device at the transmitting end affects the transmission performance of the optical fiber communication system. For example, when the communication device at the transmitting end has a fault (such as a device aging fault), the extinction ratio of the optical signal output by the communication device at the transmitting end decreases, and the eye diagram quality deteriorates, thereby causing the sensitivity of the communication device at the receiving end to deteriorate, the bit error rate to increase, and the transmission performance of the optical fiber communication system to decrease.

[0004] In order to ensure the transmission performance of the optical fiber communication system, it is necessary to detect the extinction ratio of the optical signal output by the communication device at the transmitting end to determine whether the communication device at the transmitting end has a fault, and then replace or repair the communication device at the transmitting end in time. However, some existing communication devices at the transmitting end do not have a device for detecting the extinction ratio of the optical signal. SUMMARY

[0005] Embodiments of the present application provide an optical receiving assembly, an optical module, an optical communication device, and a method for detecting an extinction ratio of an optical signal. The extinction ratio of the optical signal output by a communication device at a transmitting end connected to the optical receiving assembly can be determined through the optical receiving assembly.

[0006] In a first aspect, a light receiving assembly is provided, comprising: a photoelectric converter, a current detection circuit, a transimpedance amplifier, an electrical receiving circuit, and a calculation circuit; an input end of the photoelectric converter is connected with an input end of the light receiving assembly, an output end of the photoelectric converter is connected with an input end of the transimpedance amplifier, an output end of the transimpedance amplifier is connected with an input end of the electrical receiving circuit, and an output end of the electrical receiving circuit is connected with an output end of the light receiving assembly; the current detection circuit is connected with a power supply end of the transimpedance amplifier or a power supply end of the photoelectric converter; input ends of the calculation circuit are connected with a current output end of the current detection circuit, a gain control end of the transimpedance amplifier, a voltage output end of the electrical receiving circuit, and a gain output end of the electrical receiving circuit, respectively; the calculation circuit is configured to receive a transimpedance gain from the gain control end of the transimpedance amplifier, receive a direct current bias from the current output end of the current detection circuit, receive a voltage swing value from the voltage output end of the electrical receiving circuit, receive a gain value from the gain output end of the electrical receiving circuit, and determine an extinction ratio of a light signal received by the light receiving assembly according to the transimpedance gain, the direct current bias, the voltage swing value, and the gain value. In the light receiving assembly, since the input ends of the calculation circuit are connected with the current output end of the current detection circuit, the gain control end of the transimpedance amplifier, the voltage output end of the electrical receiving circuit, and the gain output end of the electrical receiving circuit, respectively, the calculation circuit can receive the transimpedance gain from the gain control end of the transimpedance amplifier, receive the direct current bias from the current output end of the current detection circuit, receive the voltage swing value from the voltage output end of the electrical receiving circuit, and receive the gain value from the gain output end of the electrical receiving circuit. The calculation circuit can determine an average optical power of the light signal received by the light receiving assembly according to the direct current bias, and can determine an optical power swing of the light signal received by the light receiving assembly according to the transimpedance gain, the gain value, and the voltage swing value, and thus can determine the extinction ratio of the light signal received by the light receiving assembly according to the average optical power and the optical power swing. When the performance of a transmission optical fiber between a communication device at a receiving end and a communication device at a transmitting end is ensured to be stable, the extinction ratio of the light signal received by the light receiving assembly can be determined, i.e., the extinction ratio of the light signal output by the communication device at the transmitting end connected with the communication device at the receiving end is determined. When a communication device at one receiving end is connected with communication devices at multiple transmitting ends, the extinction ratio of the light signal output by each of the communication devices at the multiple transmitting ends can also be determined by the light receiving assembly, and the complexity of determining the extinction ratio of the light signal output by each of the communication devices at the multiple transmitting ends is reduced.

[0007] Optionally, the extinction ratio satisfies the following formula: wherein ER is the extinction ratio, I rssi is the direct current bias, V pp is the voltage swing value, R tia is the transimpedance gain, and G is the gain value.

[0008] Optionally, the computing circuit is further configured to determine the optical power swing value of the optical signal according to the transimpedance gain, the voltage swing value and the gain value.

[0009] Optionally, the computing circuit further comprises a temperature compensation circuit configured to store a correspondence table between system temperatures of the optical receiving component and temperature compensation values; and the computing circuit is specifically configured to read the temperature compensation value corresponding to the current system temperature of the optical receiving component from the temperature compensation circuit, and determine the optical power swing value of the optical signal according to the transimpedance gain, the voltage swing value and the gain value in combination with the temperature compensation value corresponding to the current system temperature of the optical receiving component. In this optional mode, the transimpedance gain, the gain value and the voltage swing value are in a predetermined proportional relationship with the optical power swing value of the optical signal received by the optical receiving component, and the predetermined proportional relationship is specifically the temperature compensation value K corresponding to the current system temperature of the optical receiving component, so that the computing circuit can determine the optical power swing value of the optical signal according to the transimpedance gain, the voltage swing value and the gain value in combination with the temperature compensation value corresponding to the current system temperature of the optical receiving component.

[0010] Optionally, the optical power swing value satisfies the following formula: wherein P ran is the optical power swing value, V pp is the voltage swing value, R tia is the transimpedance gain, G is the gain value, and K is the temperature compensation value corresponding to the current system temperature of the optical receiving component.

[0011] Optionally, the computing circuit is further configured to determine the average optical power of the optical signal according to the direct current bias current.

[0012] Optionally, the computing circuit further comprises a temperature compensation circuit configured to store a correspondence table between system temperatures of the optical receiving component and temperature compensation values; and the computing circuit is specifically configured to read the temperature compensation value corresponding to the current system temperature of the optical receiving component from the temperature compensation circuit, and determine the average optical power of the optical signal according to the direct current bias current in combination with the temperature compensation value corresponding to the current system temperature of the optical receiving component. In this optional mode, the direct current bias current is in a predetermined proportional relationship with the average optical power of the optical signal received by the optical receiving component, and the predetermined proportional relationship is specifically the temperature compensation value K corresponding to the current system temperature of the optical receiving component, so that the computing circuit can determine the average optical power of the optical signal according to the direct current bias current in combination with the compensation value.

[0013] Optionally, the average optical power satisfies the following formula: P ave = I rssi × K, wherein P ave is the average optical power, I rssi is the direct current bias current, and K is the temperature compensation value corresponding to the current system temperature of the optical receiving component.

[0014] Optionally, the temperature compensation value K corresponding to the current system temperature of the optical receiving assembly satisfies the following relationship: Wherein, R is the photoelectric conversion efficiency of the photoelectric converter, p oil is the insertion loss of the optical receiving assembly, and M is the multiplication factor of the photoelectric converter.

[0015] Optionally, the photoelectric converter is configured to receive an optical signal and output a current signal to a transimpedance amplifier according to the optical signal; the current detection circuit is configured to output a direct current bias current of the photoelectric converter to a calculation circuit; the transimpedance amplifier is configured to output a voltage signal to an electrical receiving circuit according to the current signal and output a transimpedance gain to the calculation circuit; and the electrical receiving circuit is configured to output transmission data to an output end of the optical receiving assembly according to the voltage signal, and output a voltage swing value of the transmission data and a gain value of the electrical receiving circuit to the calculation circuit.

[0016] Optionally, the electrical receiving circuit comprises an analog-to-digital converter, a digital automatic gain control circuit, a digital clock recovery circuit, a digital equalizer, and a detection circuit arranged between an input end of the electrical receiving circuit and an output end of the electrical receiving circuit; the analog-to-digital converter is configured to adjust the voltage signal to a digital signal; the digital automatic gain control circuit is configured to amplify the gain of the voltage signal and output a digital gain value to a gain output end of the electrical receiving circuit; wherein the gain value comprises the digital gain value; the digital clock recovery circuit is configured to align the clock of the voltage signal; the digital equalizer is configured to perform equalization processing on the voltage signal and output the transmission data; and the detection circuit is configured to output the voltage swing value of the transmission data to a voltage output end of the electrical receiving circuit according to the transmission data. In this optional manner, the electrical receiving circuit is specifically a digital architecture electrical receiving circuit.

[0017] Optionally, the electrical receiving circuit further comprises an analog automatic gain control circuit; the analog automatic gain control circuit is arranged between the input end of the electrical receiving circuit and the analog-to-digital converter; the gain output end of the electrical receiving circuit specifically comprises a first gain output end and a second gain output end; the analog automatic gain control circuit is configured to amplify the gain of the voltage signal, output the amplified voltage signal to the analog-to-digital converter, and output an analog gain value to the first gain output end of the electrical receiving circuit; and the digital automatic gain control circuit is specifically configured to output a digital gain value to the second gain output end of the electrical receiving circuit; wherein the gain value further comprises the analog gain value.

[0018] Optionally, the electrical receiving circuit comprises an analog automatic gain control circuit, an analog clock recovery circuit, an analog equalizer and a detection circuit arranged between the input end of the electrical receiving circuit and the output end of the electrical receiving circuit; the analog automatic gain control circuit is configured to amplify the voltage signal gain and output an analog gain value to the gain output end of the electrical receiving circuit; wherein the gain value comprises the analog gain value; the analog clock recovery circuit is configured to align the clock of the voltage signal; the analog equalizer is configured to perform equalization processing on the voltage signal and output transmission data; and the detection circuit is configured to output a voltage swing value of the transmission data to the voltage output end of the electrical receiving circuit according to the transmission data. In this optional mode, the electrical receiving circuit is specifically an electrical receiving circuit in an analog architecture.

[0019] Optionally, the optical receiving assembly further comprises a capacitor arranged between the transimpedance amplifier and the electrical receiving circuit; the capacitor is configured to isolate the direct current component of the voltage signal.

[0020] In a second aspect, an optical module is provided, which comprises an optical splitter, an optical transmitting assembly and the optical receiving assembly according to any one of the first aspect described above; the optical transmitting assembly is configured to output a transmitted optical signal and transmit the transmitted optical signal to the optical splitter; the optical splitter is configured to output the transmitted optical signal and receive an optical signal and transmit the optical signal to the optical receiving assembly; and the optical receiving assembly is configured to output transmission data according to the optical signal and determine the extinction ratio of the optical signal.

[0021] In a third aspect, a communication device is provided, which comprises a signal processor and the optical module according to the second aspect described above; the signal processor is connected to the output end of the optical receiving assembly in the optical module.

[0022] In a fourth aspect, a method for detecting the extinction ratio of an optical signal is provided, which is applied to an optical receiving assembly comprising an optical-electric converter, a current detection circuit, a transimpedance amplifier, an electrical receiving circuit and a calculation circuit; the method comprises the following steps: receiving a transimpedance gain from the gain control end of the transimpedance amplifier; receiving a direct current bias current from the current output end of the current detection circuit; receiving a voltage swing value from the voltage output end of the electrical receiving circuit; receiving a gain value from the gain output end of the electrical receiving circuit; and determining the extinction ratio of the optical signal received by the optical receiving assembly according to the transimpedance gain, the direct current bias current, the voltage swing value and the gain value.

[0023] Optionally, the extinction ratio satisfies the following formula: wherein ER is the extinction ratio, I rssi is the direct current bias current, V pp is the voltage swing value, R tia is the transimpedance gain, and G is the gain value.

[0024] Optionally, the method for detecting the extinction ratio of the optical signal further comprises: determining the optical power swing value of the optical signal received by the optical receiving component according to the transimpedance gain, the voltage swing value and the gain value, and in combination with the temperature compensation value corresponding to the current system temperature of the optical receiving component; wherein the optical power swing value satisfies the following formula: P ran is the optical power swing value, V pp is the voltage swing value, R tia is the transimpedance gain, G is the gain value, and K is the temperature compensation value corresponding to the current system temperature of the optical receiving component.

[0025] Optionally, the method for detecting the extinction ratio of the optical signal further comprises: determining the average optical power of the optical signal received by the optical receiving component according to the direct current bias current, and in combination with the temperature compensation value corresponding to the current system temperature of the optical receiving component; wherein the average optical power satisfies the following formula: P ave =I rssi ×K, P ave is the average optical power, I rssi is the direct current bias current, and K is the temperature compensation value corresponding to the current system temperature of the optical receiving component.

[0026] Optionally, the temperature compensation value K corresponding to the current system temperature of the optical receiving component satisfies the following relationship: wherein R is the photoelectric conversion efficiency of the photoelectric converter, p oil is the insertion loss of the optical receiving component, and M is the multiplication factor of the photoelectric converter.

[0027] In a fifth aspect, a computer readable storage medium is provided, and the computer readable storage medium stores a computer program or instructions, when the computer program or instructions are run on a computer, the computer executes the method for detecting the extinction ratio of the optical signal according to any one of the above fourth aspects.

[0028] In a sixth aspect, a computer program product is provided, and when the computer program product is run on a computer, the computer executes the method for detecting the extinction ratio of the optical signal according to any one of the above fourth aspects.

[0029] The technical effects brought by any possible implementation manner in the second aspect to the sixth aspect can refer to the technical effects brought by the different implementation manners of the first aspect, which will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural schematic diagram of an optical fiber communication system provided by the embodiments of the present application;

[0031] Figure 2 is Figure 1Waveform diagram of voltage signal corresponding to optical signal output by communication device 11 in optical fiber communication system shown in the figure;

[0032] Figure 3 Structural schematic diagram of optical receiving assembly provided for embodiments of the present application;

[0033] Figure 4 Structural schematic diagram of electrical receiving circuit provided for embodiments of the present application;

[0034] Figure 5 Structural schematic diagram of electrical receiving circuit provided for another embodiment of the present application;

[0035] Figure 6 Structural schematic diagram of electrical receiving circuit provided for still another embodiment of the present application;

[0036] Figure 7 Structural schematic diagram of optical module provided for embodiments of the present application;

[0037] Figure 8 Structural schematic diagram of communication device provided for embodiments of the present application;

[0038] Figure 9 Structural schematic diagram of passive optical network provided for embodiments of the present application. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0040] The technical terms in the embodiments of the present application are described as follows:

[0041] Extinction ratio (EXT or ER, hereinafter, ER is taken as an example for description in subsequent embodiments): ratio of optical power P1 when communication device at transmitting end outputs all “1” code to optical power P0 when communication device at transmitting end outputs all “0” code, formula is In addition, according to the formula for calculating power It can be known that Wherein, U1 is voltage value when communication device at transmitting end outputs all “1” code, U0 is voltage value when communication device at transmitting end outputs all “0” code, I1 is current value when communication device at transmitting end outputs all “1” code, I0 is current value when communication device at transmitting end outputs all “0” code,

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by one of ordinary skill in the art. In the embodiments of the present application, "at least one" means one or more, and "multiple" means two or more. "And / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after it. "At least one of the following" or similar expressions means any combination of these items, including any combination of single item or multiple items. For example, at least one of a, b or c can represent a, b, c, a and b, a and c, b and c, or a, b and c, where a, b and c can be singular or plural. In addition, in the embodiments of the present application, "first", "second", and the like do not limit the quantity and order.

[0043] In addition, in the embodiments of the present application, the orientation terms such as "upper", "lower", and the like are defined with respect to the orientation in which the components in the drawings are placed, and it should be understood that these directional terms are relative concepts, which are used for relative description and clarification, and can change accordingly according to the change of the orientation in which the components in the drawings are placed.

[0044] In the embodiments of the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design presented as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the use of the words "exemplary" or "for example" is intended to present concepts in a concrete manner.

[0045] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0046] The implementation manners of the embodiments of the present application will be described in detail below with reference to the drawings in the embodiments of the present application.

[0047] The optical fiber communication system provided by the embodiments of the present application can be an Ethernet, a fiber to the home (FTTH), an optical transport network (OTN), a passive optical network (PON), a network storage, a data center, a coherent optical communication, a space optical communication, and the like.

[0048] Reference Figure 1As shown, an embodiment of the present application provides a structural schematic diagram of an optical fiber communication system 10, wherein the optical fiber communication system 10 includes a communication device 11, a communication device 12, and a transmission optical fiber 13 connecting the communication device 11 and the communication device 12. In a signal transmission process, the communication device 11 is a communication device at the transmitting end, and the communication device 12 is a communication device at the receiving end. The communication device 11 outputs an optical signal according to the transmission data, and transmits the optical signal to the communication device 12 through the transmission optical fiber 13. The communication device 12 receives the optical signal to obtain the transmission data, thereby realizing communication.

[0049] For example, refer to Figure 1 As shown, communication device 11 includes an optical module 110, which includes a transmitting optical sub-assembly (TOSA) 111, a receiving optical sub-assembly (ROSA) 112, and an optical splitter 113. Communication device 12 includes an optical module 120, which includes a transmitting optical sub-assembly 121, a receiving optical sub-assembly 122, and an optical splitter 123. Specifically, optical transmitting sub-assembly 112 in communication device 11 outputs an optical signal to optical splitter 113 based on transmission data. Optical splitter 113 transmits the optical signal to communication device 12 via transmission optical fiber 13. Optical splitter 123 in communication device 12 receives the optical signal and transmits it to optical receiving sub-assembly 122. Optical receiving sub-assembly 122 receives the optical signal to obtain the transmission data, thereby achieving communication.

[0050] In other embodiments, the communication device 12 may be a transmitting end communication device, and the communication device 11 may be a receiving end communication device.

[0051] The extinction ratio of the optical signal output by the communication device 11 can affect the transmission performance of the optical fiber communication system 10. For example, if the communication device 11 experiences a fault (e.g., due to aging of a component in the communication device 11), the extinction ratio of the optical signal output by the communication device 11 can decrease, deteriorating the eye diagram quality. This can further reduce the sensitivity of the optical signal received by the communication device 12 and increase the bit error rate, thus reducing the transmission performance of the optical fiber communication system 10.

[0052] In order to ensure the transmission performance of the optical fiber communication system 10, it is necessary to detect the extinction ratio of the optical signal output by the communication device 11 to determine whether the communication device 11 has a fault, and then replace or repair the communication device 11 in time. Figure 1As shown, the light emitting component 111 may specifically include a laser diode (LD) 101 , a monitor photodiode (MPD) 102 , an analog-to-digital converter (ADC) 103 and a calculation circuit 104 .

[0053] The laser diode 101 is used to receive transmission data and output an optical signal based on the transmission data. The optical signal can be transmitted to the communication device 12 via the transmission optical fiber 13. The optical signal can also be transmitted to the photoelectric monitoring diode 102. For example, when the extinction ratio of the communication device 11 needs to be detected, the optical signal will be transmitted to the photoelectric monitoring diode 102. For example, when the optical signal needs to be output, the optical signal will be transmitted to the communication device 12 via the optical splitter 113 and the transmission optical fiber 13.

[0054] When it is necessary to detect the extinction ratio of the optical signal output by the communication device 11, the photoelectric monitoring diode 102 receives the optical signal, outputs a current signal based on the optical signal, and transmits the current signal to the analog-to-digital converter 103. The analog-to-digital converter 103 is configured to output a voltage signal based on the current signal, and transmits the voltage signal to the calculation circuit 104. The calculation circuit 104 determines the extinction ratio of the communication device 11 and the DC bias voltage and AC voltage swing value of the communication device 11 based on the voltage signal. The current signal and the voltage signal are collectively referred to as electrical signals.

[0055] The waveform of the voltage signal received by the calculation circuit 104 is as follows: Figure 2 As shown, Figure 2 The horizontal axis represents time in milliseconds (ms). Figure 2 The vertical axis represents voltage, in millivolts (mV), wherein the calculation circuit 104 can determine the DC voltage value U of the communication device 11 according to the waveform of the voltage signal. ave , AC voltage swing value U ran The calculation circuit 104 can also calculate the DC voltage value U ave The impedance of the analog-to-digital converter 103 determines the DC bias current I of the laser diode 101 in the communication device 11. ave , according to the AC voltage swing value U ran The impedance of the analog-to-digital converter 103 determines the AC current swing value I of the laser diode 101 in the communication device 11. ran .

[0056] The calculation circuit 104 can calculate the DC voltage value U ave And the AC voltage swing value U ranThe voltage value U1 when the communication device 11 outputs all "1" code and the voltage value U0 when the communication device 11 outputs all "0" code are determined, and then the extinction ratio ER of the communication device 11 is determined.

[0057] Specifically,

[0058]

[0059] Alternatively, the computing circuit 104 can determine the direct current bias current I ave and the alternating current swing value I ran The current value I1 when the communication device 11 outputs all "1" code and the current value I0 when the communication device 11 outputs all "0" code are determined, and then the extinction ratio ER of the communication device 11 is determined.

[0060] Specifically,

[0061] In Figure 1 In the communication device 11 shown in FIG. 1, because the photodiode 102, the analog-digital converter 103 and the computing circuit 104 are arranged in the light emitting assembly 111, the extinction ratio of the light signal output by the communication device 11 can be determined. However, many light emitting assemblies do not have these devices arranged therein, and thus the extinction ratio of the light signal output by the communication device including these light emitting assemblies cannot be determined.

[0062] In addition, the light receiving assembly 122 includes a direct current blocking capacitor, and when the light signal is transmitted to the light receiving assembly 122, the direct current blocking capacitor can isolate the direct current component in the electrical signal corresponding to the light signal, and thus the extinction ratio of the light signal output by the communication device 11 cannot be determined in the light receiving assembly 122.

[0063] Therefore, the embodiment of the present application provides a light receiving assembly, which can be arranged in a light module, and through the light receiving assembly, the extinction ratio of the light signal output by the communication device of the transmitting end connected to the light receiving assembly can be determined in a signal transmission process.

[0064] Referring to Figure 3 shown, Figure 3 FIG. 2 is a structural schematic diagram of the light receiving assembly 20 provided by the embodiment of the present application, and the light receiving assembly 20 includes a photoelectric converter 21, a current detection circuit 22, a trans-impedance amplifier 23, an electrical receiving circuit 24 and a computing circuit 25.

[0065] Referring to Figure 3As shown in the figure, the input end a of the photoelectric converter 21 is connected with the input end of the light receiving assembly 20, the output end b of the photoelectric converter 21 is connected with the input end c of the trans-impedance amplifier 23, the output end d of the trans-impedance amplifier 23 is connected with the input end e of the electric receiving circuit 24, and the output end f of the electric receiving circuit 24 is connected with the output end of the light receiving assembly 20; the current detection circuit 22 is connected with the power supply end k of the trans-impedance amplifier 23 or the power supply end m of the photoelectric converter 21.

[0066] For example, the photoelectric converter 21 can be a photo diode (PD), the current detection circuit 22 can be a resistor, one end of the current detection circuit 22 is connected with the power supply end m of the photoelectric converter 21, the other end of the current detection circuit 22 is connected with a power supply, the power supply provides a direct current bias voltage for the photoelectric converter 21, and the size of the direct current bias current corresponding to the direct current bias voltage can be detected through the current detection circuit 22. In another example, the photoelectric converter 21 can be an avalanche photo diode (APD), the current detection circuit 22 can be a mirror current source, one end of the current detection circuit 22 is connected with the power supply end k of the trans-impedance amplifier 23, the power supply end k of the trans-impedance amplifier 23 is also connected with the power supply end m of the photoelectric converter 21, the other end of the current detection circuit 22 is connected with a power supply, the power supply provides a direct current bias voltage for the photoelectric converter 21, and the size of the direct current bias current corresponding to the direct current bias voltage can be detected through the current detection circuit 22.

[0067] The input end of the calculation circuit 25 is connected with the current output end j of the current detection circuit 22, the gain control end i of the trans-impedance amplifier 23, the voltage output end g of the electric receiving circuit 24, and the gain output end h of the electric receiving circuit 24, respectively.

[0068] When the light signal O1 is received at the input end of the light receiving assembly 20, the photoelectric converter 21 receives the light signal O1 and outputs a current signal I2 to the trans-impedance amplifier 23 according to the light signal O1. For example, the photoelectric converter 21 receives a direct current bias voltage transmitted by a power supply, and outputs the current signal I2 to the trans-impedance amplifier 23 according to the light signal O1 under the drive of the direct current bias voltage.

[0069] The current detection circuit 22 is used to determine the direct current bias current of the photoelectric converter 21. For example, the input end of the calculation circuit 25 is connected with the current output end j of the current detection circuit 22, so that the direct current bias current determined by the current detection circuit 22 can be transmitted to the calculation circuit 25.

[0070] The trans-impedance amplifier 23 is configured to output a voltage signal I3 to the electrical receiving circuit 24 according to the current signal I2, and output a trans-impedance gain to the calculation circuit 25. In an example, the voltage signal I3 is an analog voltage signal, the gain control terminal i of the trans-impedance amplifier 23 receives the trans-impedance gain, and the trans-impedance amplifier 23 amplifies the current signal I2 according to the trans-impedance gain to output the voltage signal I3 to the electrical receiving circuit 24. The input terminal of the calculation circuit 25 is connected to the gain control terminal i of the trans-impedance amplifier 23, so that the trans-impedance gain of the trans-impedance amplifier 23 can be transmitted to the calculation circuit 25.

[0071] In some embodiments, the optical receiving assembly 20 further comprises a capacitor 26 disposed between the trans-impedance amplifier 23 and the electrical receiving circuit 24. The capacitor 26 is configured to isolate a direct current component of the voltage signal I3, and transmit the voltage signal I3 without the direct current component to the electrical receiving circuit 24.

[0072] The electrical receiving circuit 24 is configured to output transmission data to an output terminal of the optical receiving assembly 20 according to the voltage signal I3, and output a voltage swing value of the transmission data and a gain value of the electrical receiving circuit to the calculation circuit 25. In an example, the processing of the voltage signal I3 by the electrical receiving circuit 24 includes gain amplification, clock alignment, etc., so as to output the transmission data according to the voltage signal I3. During the processing of the voltage signal I3 by the electrical receiving circuit 24, the voltage swing value of the transmission data is transmitted to a voltage output terminal g of the electrical receiving circuit 24, and the gain value of the electrical receiving circuit 24 is transmitted to a gain output terminal h of the electrical receiving circuit 24. Since the input terminal of the calculation circuit 25 is connected to the voltage output terminal g of the electrical receiving circuit 24, and the input terminal of the calculation circuit 25 is connected to the gain output terminal h of the electrical receiving circuit 24, the voltage swing value of the transmission data and the gain value of the electrical receiving circuit 24 can be transmitted to the calculation circuit 25.

[0073] The calculation circuit 25 is configured to receive the trans-impedance gain from the gain control terminal i of the trans-impedance amplifier 23, receive the direct current bias current from the current output terminal j of the current detection circuit 22, receive the voltage swing value from the voltage output terminal g of the electrical receiving circuit 24, and receive the gain value from the gain output terminal h of the electrical receiving circuit 24. The calculation circuit 25 is configured to determine an extinction ratio of an optical signal received by the optical receiving assembly 20 according to the trans-impedance gain, the direct current bias current, the voltage swing value, and the gain value.

[0074] In the optical receiving assembly 20, since the input end of the calculation circuit 25 is connected with the current output end j of the current detection circuit 22, the gain control end i of the transimpedance amplifier 23, the voltage output end g of the electrical receiving circuit 24 and the gain output end h of the electrical receiving circuit 24 respectively, the calculation circuit 25 can receive the transimpedance gain from the gain control end i of the transimpedance amplifier 23, the DC bias current from the current output end j of the current detection circuit 22, the voltage swing value from the voltage output end g of the electrical receiving circuit 24 and the gain value from the gain output end h of the electrical receiving circuit 24. Wherein, the calculation circuit 25 can determine the average optical power of the optical signal received by the optical receiving assembly 20 according to the DC bias current, and the calculation circuit 25 can determine the optical power swing of the optical signal received by the optical receiving assembly 20 according to the transimpedance gain, the gain value and the voltage swing value, and then can determine the extinction ratio of the optical signal received by the optical receiving assembly 20 according to the average optical power and the optical power swing. When the performance of the transmission optical fiber between the communication device of the receiving end and the communication device of the transmitting end is ensured to be stable, the extinction ratio of the optical signal received by the optical receiving assembly 20 can be determined through the optical receiving assembly 20, that is, the extinction ratio of the optical signal output by the communication device of the transmitting end connected with the communication device of the receiving end is determined. When one communication device of the receiving end is connected with multiple communication devices of the transmitting end, the extinction ratio of the optical signal output by each communication device of the multiple communication devices of the transmitting end can also be determined through the optical receiving assembly 20, and the complexity of determining the extinction ratio of the optical signal output by each communication device of the multiple communication devices of the transmitting end is also reduced.

[0075] For example, the extinction ratio of the optical signal O1 received by the optical receiving assembly 20 satisfies the following formula:

[0076]

[0077] Wherein, ER is the extinction ratio of the optical signal O1 received by the optical receiving assembly 20, I rssi is the DC bias current, V pp is the voltage swing value, R tia is the transimpedance gain, and G is the gain value.

[0078] In some embodiments, the calculation circuit 25 is further configured to determine the optical power swing value of the optical signal O1 according to the transimpedance gain, the voltage swing value and the gain value.

[0079] Specifically, referring to Figure 3As shown, the computing circuit 25 further comprises a temperature compensation circuit 251; the temperature compensation circuit 251 is configured to store a correspondence table between the system temperature of the optical receiving assembly 20 and a temperature compensation value. The computing circuit 25 can read the temperature compensation value corresponding to the current system temperature of the optical receiving assembly 20 from the temperature compensation circuit 251, and the computing circuit 25 is specifically configured to determine the optical power swing value of the optical signal O1 according to the transimpedance gain, the voltage swing value, and the gain value, in combination with the temperature compensation value corresponding to the current system temperature of the optical receiving assembly 20.

[0080] For example, the optical receiving assembly 20 further comprises a temperature detector configured to detect the system temperature of the optical receiving assembly 20, and the computing circuit 25 is connected to the temperature detector, so that the computing circuit 25 can obtain the current system temperature of the optical receiving assembly 20 detected by the temperature detector.

[0081] The optical power swing value satisfies the following formula:

[0082] The optical power swing value satisfies the following formula: ran The optical power swing value satisfies the following formula: pp The optical power swing value satisfies the following formula: tia The optical power swing value satisfies the following formula:

[0083] In formula 2, the voltage swing value V pp is divided by the transimpedance gain R tia , and the current value is calculated, which is in units of milliamperes (mA), the gain value G has no unit, and the temperature compensation value K corresponding to the current system temperature of the optical receiving assembly 20 satisfies the following relationship: The optical power swing value satisfies the following formula: oil The optical power swing value satisfies the following formula: oil The optical power swing value satisfies the following formula: ran The optical power swing value satisfies the following formula: ran The optical power swing value satisfies the following formula:

[0084] In some embodiments, the computing circuit 25 is further configured to determine the average optical power of the optical signal O1 according to the direct current bias current.

[0085] In some embodiments, the computing circuit 25 is further configured to determine the average optical power of the optical signal O1 according to the direct current bias current. Figure 3 In some embodiments, the computing circuit 25 further comprises a temperature compensation circuit 251, and the temperature compensation circuit 251 is configured to store a correspondence table between the system temperature of the optical receiving assembly 20 and the temperature compensation value. The computing circuit 25 is configured to read the temperature compensation value corresponding to the current system temperature of the optical receiving assembly 20 from the temperature compensation circuit 251, and determine the average optical power of the optical signal O1 according to the direct current bias current and the temperature compensation value corresponding to the current system temperature of the optical receiving assembly 20.

[0086] In some embodiments, the average optical power of the optical signal O1 satisfies the following formula: P ave = I rssi × K (Formula 4).

[0087] In some embodiments, P ave is the average optical power, I rssi is the direct current bias current, and K is the temperature compensation value corresponding to the current system temperature of the optical receiving assembly 20.

[0088] In Formula 4, the unit of the direct current bias current I rssi is milliamperes (mA), and the temperature compensation value K corresponding to the current system temperature of the optical receiving assembly 20 satisfies the above Formula 3. Therefore, the average optical power P ave can be calculated by Formula 4, and the unit of the average optical power P ave is milliwatts (mW).

[0089] In some embodiments, the computing circuit 25 determines the optical power swing value of the optical signal O1 according to the transimpedance gain, the voltage swing value, and the gain value, and in combination with the temperature compensation value corresponding to the current system temperature of the optical receiving assembly 20. After the computing circuit 25 determines the average optical power of the optical signal O1 according to the direct current bias current and in combination with the temperature compensation value corresponding to the current system temperature of the optical receiving assembly 20, the computing circuit can determine the power value P 11 when the optical signal O1 is a full "1" code, and the power value P 00 when the optical signal O1 is a full "0" code. Specifically, Therefore, the extinction ratio of the optical signal O1 is P

[0090] Exemplarily, since the temperature compensation value K corresponding to the current system temperature of the light receiving assembly 20 can have an error, the extinction ratio of the optical signal O1 calculated by the formula 1 is more accurate than the extinction ratio of the optical signal O1 calculated by the formula 7.

[0091] Wherein, the formula 2 and the formula 4 are substituted into the formula 7, and the temperature compensation value K corresponding to the current system temperature of the light receiving assembly 20 is removed, so as to obtain the formula 1, specifically:

[0092]

[0093] In some embodiments, the electrical receiving circuit 24 is specifically an electrical receiving circuit of a digital architecture, referring to Figure 4 , wherein the electrical receiving circuit 24 includes an analog-digital converter 241, a digital automatic gain control circuit 242, a digital clock recovery circuit 243, a digital equalizer 244 and a detection circuit 245, which are arranged between the input end e of the electrical receiving circuit 24 and the output end f of the electrical receiving circuit 24.

[0094] The analog-digital converter 241 is configured to adjust the voltage signal I3 into a digital signal.

[0095] The digital automatic gain control circuit 242 is configured to amplify the voltage signal I3 by a gain, and output a digital gain value G 242 to the gain output end h of the electrical receiving circuit 24; wherein the gain value in the above formula 1 and formula 2 includes a digital gain value, specifically G 242 .

[0096] The digital clock recovery circuit 243 is configured to align the clock of the voltage signal I3.

[0097] The digital equalizer 244 is configured to perform equalization processing on the voltage signal I3, and output transmission data.

[0098] The detection circuit 245 is configured to output a voltage swing value of the transmission data to the voltage output end g of the electrical receiving circuit 24 according to the transmission data.

[0099] In other embodiments, referring to Figure 5 , compared with the electrical receiving circuit 24 shown in Figure 4 , the electrical receiving circuit 24 shown in Figure 5 further includes an analog automatic gain control circuit 246; the analog automatic gain control circuit 246 is arranged between the input end e of the electrical receiving circuit 24 and the analog-digital converter 241, and the gain output end h of the electrical receiving circuit 24 specifically includes a gain output end h1 and a gain output end h2.

[0100] The analog automatic gain control 246 is configured to amplify the voltage signal I3 by a gain value G, output the amplified voltage signal I3 to the analog-digital converter 241, and output the analog gain value G to the gain output end h1 of the electrical receiving circuit 24 246 The digital automatic gain control circuit 242 is configured to output the digital gain value G to the gain output end h2 of the electrical receiving circuit 24 242 , wherein the gain value in the above formula 1 and formula 2 includes the digital gain value and the analog gain value, and specifically G=G 242 ×G 246 .

[0101] In some embodiments, the electrical receiving circuit 24 is specifically an electrical receiving circuit in an analog architecture, as shown in Figure 6 , wherein the electrical receiving circuit 24 includes the analog automatic gain control circuit 247, the analog clock recovery circuit 248, the analog equalizer 249, and the detection circuit 240, which are arranged between the input end e of the electrical receiving circuit 24 and the output end f of the electrical receiving circuit 24.

[0102] The analog automatic gain control circuit 247 is configured to amplify the voltage signal I3 by a gain value G, and output the analog gain value G to the gain output end h of the electrical receiving circuit 24 247 , wherein the gain value in the above formula 1 and formula 2 includes the analog gain value, and specifically G=G 247 .

[0103] The analog clock recovery circuit 248 is configured to align the clock of the voltage signal I3.

[0104] The analog equalizer 249 is configured to perform equalization processing on the voltage signal I3, and output transmission data.

[0105] The detection circuit 240 is configured to output the voltage swing value of the transmission data to the voltage output end g of the electrical receiving circuit 24 according to the transmission data. As shown in Figure 7 , the embodiment of the present application further provides a structural schematic diagram of an optical module 30, which includes a light splitter 31, an optical transmitting assembly 32, and the optical receiving assembly 20 as shown in Figure 3 . The optical module 30 can output a transmitting optical signal, and can also receive an optical signal. When the optical module 30 outputs the transmitting optical signal, the optical transmitting assembly 32 is specifically configured to output the transmitting optical signal, and transmit the transmitting optical signal to the light splitter 31; the light splitter 31 is configured to output the transmitting optical signal. When the optical module 30 receives the optical signal, the light splitter 31 is further configured to receive the optical signal, and transmit the optical signal to the optical receiving assembly 20; the optical receiving assembly 20 is configured to output transmission data according to the optical signal, and determine the extinction ratio of the optical signal.

[0106] As shown in Figure 8As shown, the embodiments of the present application also provide a structural schematic diagram of a communication device 40, which comprises a signal processor 41 and an optical module 30 as shown. Figure 7 The signal processor 41 is connected with the output end of the optical receiving component 20 in the optical module 30. The signal processor 41 is used for processing the transmission data output by the optical receiving component 20.

[0107] In some embodiments, referring to Figure 9 As shown, the embodiments of the present application provide a structural schematic diagram of a passive optical network (PON) 50, wherein, Figure 8 The communication device 40 as shown can be specifically an optical line termination (OLT) in the passive optical network 50, which further comprises an optical combiner / splitter 51 and a plurality of user-side devices 52, including optical network units (ONUs) (for example Figure 9 optical network units 52-1, 52-2), optical network terminals (ONTs) (for example Figure 9 optical network terminals 52-3, 52-4). The connection mode of the passive optical network 50 is that the communication device 40 and the plurality of user-side devices 52 are connected through the optical combiner / splitter 51, and the transmission mode between the communication device 40 and the plurality of user-side devices 52 is point to muti-point (P2MP).

[0108] When transmitting a downlink optical signal in the passive optical network 50, the optical transmitting component 32 in the optical module 30 in the communication device 40 outputs the downlink optical signal and transmits the downlink optical signal to the optical splitter 31; the optical splitter 31 is used for transmitting the downlink optical signal to the optical combiner / splitter 51, and the optical combiner / splitter 51 transmits the downlink optical signal to each user-side device 52. The communication device 40 can transmit the downlink optical signal to each user-side device 52 in a broadcast mode. Alternatively, the communication device 40 can also transmit the downlink optical signal to each user-side device in a broadcast plus ONU identification or ONT mode.

[0109] The uplink optical signal is transmitted to the communication device 40 by the user-side device 52, and the multiple user-side devices 52 adopt time division multiplexing (TDM) to transmit the generated uplink optical signal to the communication device 40 through the optical combiner / splitter 51. For example, in the first time period, the optical network unit 52-1 outputs a first uplink optical signal, the first uplink optical signal is transmitted to the communication device 40 through the optical combiner / splitter 51, and the optical splitter 31 in the optical module 30 in the communication device 40 is used to receive the first uplink optical signal and transmit the first uplink optical signal to the optical receiving assembly 20; the optical receiving assembly 20 is configured to output first transmission data to the signal processor 41 according to the first uplink optical signal, and determine the extinction ratio of the first uplink optical signal. In the second time period after the first time period, the optical network unit 52-2 outputs a second uplink optical signal, the second uplink optical signal is transmitted to the communication device 40 through the optical combiner / splitter 51, and the optical splitter 31 in the optical module 30 in the communication device 40 is used to receive the second uplink optical signal and transmit the second uplink optical signal to the optical receiving assembly 20; the optical receiving assembly 20 is configured to output second transmission data to the signal processor 41 according to the second uplink optical signal, and determine the extinction ratio of the second uplink optical signal. In the third time period after the second time period, the optical network terminal 52-3 outputs a third uplink optical signal, the third uplink optical signal is transmitted to the communication device 40 through the optical combiner / splitter 51, and the optical splitter 31 in the optical module 30 in the communication device 40 is used to receive the third uplink optical signal and transmit the third uplink optical signal to the optical receiving assembly 20; the optical receiving assembly 20 is configured to output third transmission data to the signal processor 41 according to the third uplink optical signal, and determine the extinction ratio of the third uplink optical signal. In the fourth time period after the third time period, the optical network terminal 52-4 outputs a fourth uplink optical signal, the fourth uplink optical signal is transmitted to the communication device 40 through the optical combiner / splitter 51, and the optical splitter 31 in the optical module 30 in the communication device 40 is used to receive the fourth uplink optical signal and transmit the fourth uplink optical signal to the optical receiving assembly 20; the optical receiving assembly 20 is configured to output fourth transmission data to the signal processor 41 according to the fourth uplink optical signal, and determine the extinction ratio of the fourth uplink optical signal.

[0110] Figure 9 The communication device 40 shown can determine the extinction ratios of the optical signals output by the multiple user-side devices 52 respectively, which reduces the complexity of setting detection devices (such as Figure 1 The photoelectric monitoring diode 102, the analog-to-digital converter 103, and the calculation circuit 104 shown are used to determine the extinction ratios of the respective output optical signals.

[0111] Exemplarily, the embodiment of the present application also provides a method for detecting an extinction ratio of an optical signal, which is applied to an optical receiving assembly, which can be the optical receiving assembly 20 shown in the figure. Figure 3 The optical receiving assembly 20 shown in the figure includes an optical-electric converter 21, a current detection circuit 22, a trans-impedance amplifier 23, an electric receiving circuit 24, and a calculation circuit 25.

[0112] The method for detecting the extinction ratio of the optical signal includes:

[0113] Step S101, receiving the trans-impedance gain from the gain control end i of the trans-impedance amplifier 23;

[0114] Step S102, receiving the DC bias current from the current output end j of the current detection circuit 22;

[0115] Step S103, receiving the voltage swing value from the voltage output end g of the electric receiving circuit 24;

[0116] Step S104, receiving the gain value from the gain output end h of the electric receiving circuit 24,

[0117] Step S105, determining the extinction ratio of the optical signal received by the optical receiving assembly 20 according to the trans-impedance gain, the DC bias current, the voltage swing value, and the gain value.

[0118] Exemplarily, the extinction ratio of the optical signal received by the optical receiving assembly 20 satisfies the following formula: Wherein, ER is the extinction ratio of the optical signal received by the optical receiving assembly 20, I rssi is the DC bias current, V pp is the voltage swing value, R tia is the trans-impedance gain, and G is the gain value.

[0119] Exemplarily, the method for detecting the extinction ratio of the optical signal further includes:

[0120] Step S106, determining the optical power swing value of the optical signal received by the optical receiving assembly 20 according to the trans-impedance gain, the voltage swing value, and the gain value, in combination with a temperature compensation value corresponding to the current system temperature of the optical receiving assembly 20.

[0121] Wherein, the optical power swing value satisfies the following formula: P ran is the optical power swing value of the optical signal received by the optical receiving assembly 20, V pp is the voltage swing value, R tia is the trans-impedance gain, G is the gain value, and K is the temperature compensation value corresponding to the current system temperature of the optical receiving assembly 20.

[0122] Exemplarily, the method for detecting the extinction ratio of the optical signal further includes:

[0123] In step S107, the average optical power of the optical signal received by the optical receiving assembly 20 is determined according to the direct current bias current and the temperature compensation value corresponding to the current system temperature of the optical receiving assembly 20.

[0124] wherein the average optical power satisfies the following formula: P ave = I rssi × K, P ave is the average optical power of the optical signal received by the optical receiving assembly 20, I rssi is the direct current bias current, and K is the temperature compensation value corresponding to the current system temperature of the optical receiving assembly 20.

[0125] For example, the temperature compensation value K corresponding to the current system temperature of the optical receiving assembly 20 satisfies the following relationship: wherein R is the photoelectric conversion efficiency of the photoelectric converter 21, p oil is the insertion loss of the optical receiving assembly 20, and M is the multiplication factor of the photoelectric converter 21.

[0126] In some embodiments, the method for detecting the optical extinction ratio of the optical signal can include steps S101-S104, S106, and S107, and further include step S108 for determining the optical extinction ratio of the optical signal received by the optical receiving assembly 20 according to the optical power swing value and the average optical power. For example, the optical power swing value and the average optical power can be used to determine the power value P 11 when the optical signal received by the optical receiving assembly 20 is a full "1" code, and the power value P 00 when the optical signal received by the optical receiving assembly 20 is a full "0" code. Specifically, The optical power swing value, the average optical power, and the optical extinction ratio of the optical signal received by the optical receiving assembly 20 satisfy the following formula

[0127]

[0128] Since the temperature compensation value K corresponding to the current system temperature of the optical receiving assembly 20 can have errors, the optical extinction ratio of the optical signal received by the optical receiving assembly 20 calculated by steps S101-S104, S106, S107, and S108 is less accurate than the optical extinction ratio of the optical signal received by the optical receiving assembly 20 calculated by steps S101-S105.

[0129] Exemplarily, the detection method of the optical signal extinction ratio can be implemented in the form of a software function module and sold or used as an independent product, and the detection method of the optical signal extinction ratio can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present application essentially or say the parts that make contributions to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the method described in the embodiments of the present application. The storage medium for storing the computer software product includes a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0130] Optionally, the embodiments of the present application further provide a computer readable storage medium, and the computer readable storage medium stores a computer program or instructions. When the computer program or instructions run on a computer, the computer executes the detection method of the optical signal extinction ratio shown in any of the embodiments.

[0131] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by a software program, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program product runs on a computer, the computer executes the detection method of the optical signal extinction ratio provided by the embodiments of the present application.

[0132] The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus or devices. The computer instructions can be stored in or transferred from one computer-readable medium to another computer-readable medium, such as a website, a computer, a server, or a data center, via wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable medium can be any available medium or data storage device that can be accessed by a computer, including one or more servers, data centers, etc. The available medium can be a magnetic medium (e.g., floppy diskette, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid state drive (SSD)), etc.

[0133] Although the present application has been described in connection with certain specific features and embodiments thereof, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the scope of the application. Obviously, many modifications and variations of the present application are possible in light of its teachings. It is intended that the scope of the application encompass these and all other modifications and equivalents. Therefore, the above description is intended to be illustrative, and not restrictive. Many other embodiments will be apparent to those of skill in the art upon reviewing the above description. The scope of the application should, therefore, be determined not with reference to the above description, but instead with reference to the appended claims, along with their full scope of equivalents.

Claims

1. A light receiving component, characterized in that: The light receiving assembly comprises: a photoelectric converter, a current detection circuit, a transimpedance amplifier, an electrical receiving circuit, and a calculation circuit; an input end of the photoelectric converter is connected with an input end of the light receiving assembly, an output end of the photoelectric converter is connected with an input end of the transimpedance amplifier, an output end of the transimpedance amplifier is connected with an input end of the electrical receiving circuit, and an output end of the electrical receiving circuit is connected with an output end of the light receiving assembly; the current detection circuit is connected with a power supply end of the transimpedance amplifier or a power supply end of the photoelectric converter; input ends of the calculation circuit are connected with a current output end of the current detection circuit, a gain control end of the transimpedance amplifier, a voltage output end of the electrical receiving circuit, and a gain output end of the electrical receiving circuit, respectively; the calculation circuit is configured to receive a transimpedance gain from the gain control end of the transimpedance amplifier, receive a direct current bias from the current output end of the current detection circuit, receive a voltage swing value from the voltage output end of the electrical receiving circuit, receive a gain value from the gain output end of the electrical receiving circuit, and determine an extinction ratio of a light signal received by the light receiving assembly according to the transimpedance gain, the direct current bias, the voltage swing value, and the gain value.

2. The optical receiving assembly of claim 1, wherein, The extinction ratio satisfies the following formula: wherein ER is the extinction ratio, I rssi is the direct current bias, V pp is the voltage swing, R tia is the transimpedance gain, G is the gain value.

3. The light receiving assembly of claim 1 or 2, wherein the calculation circuit is further configured to determine a light power swing value of the light signal according to the transimpedance gain, the voltage swing value, and the gain value.

4. The light receiving assembly of claim 3, wherein the calculation circuit further comprises a temperature compensation circuit configured to store a correspondence table between system temperatures of the light receiving assembly and temperature compensation values; the calculation circuit is specifically configured to read a temperature compensation value corresponding to a current system temperature of the light receiving assembly from the temperature compensation circuit, determine the light power swing value of the light signal according to the transimpedance gain, the voltage swing value, and the gain value, and in combination with the temperature compensation value corresponding to the current system temperature of the light receiving assembly.

5. The light receiving assembly of claim 4, wherein the light power swing value satisfies the following formula: wherein P ran is the optical power swing value, V pp is the voltage swing value, R tia is the transimpedance gain, G is the gain value, and K is a temperature compensation value corresponding to the current system temperature of the optical receiving component.

6. The light receiving assembly of any one of claims 1-5, wherein the calculation circuit is further configured to determine an average light power of the light signal according to the direct current bias.

7. The light receiving assembly of claim 6, wherein the calculation circuit further comprises a temperature compensation circuit configured to store a correspondence table between system temperatures of the light receiving assembly and temperature compensation values; the calculation circuit is specifically configured to read a temperature compensation value corresponding to a current system temperature of the light receiving assembly from the temperature compensation circuit, determine the average light power of the light signal according to the direct current bias, and in combination with the temperature compensation value corresponding to the current system temperature of the light receiving assembly.

8. The light receiving assembly of claim 7, wherein the average light power satisfies the following formula: P ave = I rssi x K, wherein P ave is the average optical power, I rssi is the direct current bias current, and K is a temperature compensation value corresponding to the current system temperature of the optical receiving component. 9.The optical receiving assembly of claim 5 or 8, wherein a temperature compensation value K corresponding to a current system temperature of the optical receiving assembly satisfies the following relationship: K = K 0 + K 1 * T + K 2 * T 2, wherein K 0, K 1 and K 2 are constants, and T is the current system temperature of the optical receiving assembly. 10.The optical receiving assembly of any one of claims 1-9, wherein the photoelectric converter is configured to receive the optical signal and output a current signal to the trans-impedance amplifier according to the optical signal. wherein R is the photoelectric conversion efficiency of the photoelectric converter, p oil is the insertion loss of the light receiving assembly, and M is the multiplication factor of the photoelectric converter. 11.The optical receiving assembly of claim 10, wherein the electrical receiving circuit comprises an analog-to-digital converter, a digital automatic gain control circuit, a digital clock recovery circuit, a digital equalizer and a detection circuit, which are arranged between the input end of the electrical receiving circuit and the output end of the electrical receiving circuit. 12.The optical receiving assembly of claim 11, wherein the electrical receiving circuit further comprises an analog automatic gain control circuit, which is arranged between the input end of the electrical receiving circuit and the analog-to-digital converter. 13.The optical receiving assembly of claim 10, wherein the electrical receiving circuit comprises an analog automatic gain control circuit, an analog clock recovery circuit, an analog equalizer and a detection circuit, which are arranged between the input end of the electrical receiving circuit and the output end of the electrical receiving circuit. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The analog automatic gain control circuit is configured to amplify the voltage signal gain and output an analog gain value to a gain output end of the electric receiving circuit; wherein the gain value comprises the analog gain value. The analog clock recovery current is configured to align a clock of the voltage signal. The analog equalizer is configured to perform equalization processing on the voltage signal and output the transmission data. The detection circuit is configured to output the voltage swing value of the transmission data to a voltage output end of the electric receiving circuit according to the transmission data.

14. The optical receiving assembly of any of claims 10-13, wherein, The optical receiving assembly further comprises a capacitor arranged between the transimpedance amplifier and the electric receiving circuit. The capacitor is configured to isolate a direct current component of the voltage signal.

15. An optical module characterized by comprising: The optical module comprises a light splitter, an optical transmitting assembly, and the optical receiving assembly according to any one of claims 1-14. The optical transmitting assembly is configured to output a transmitting optical signal and transmit the transmitting optical signal to the light splitter. The light splitter is configured to output the transmitting optical signal. The optical module is further configured to receive an optical signal and transmit the optical signal to the optical receiving assembly. The optical receiving assembly is configured to output transmission data according to the optical signal and determine an optical extinction ratio of the optical signal.

16. A communication device, characterized by The optical communication device comprises a signal processor and the optical module according to claim 15; the signal processor is connected with an output end of the optical receiving assembly in the optical module.

17. A method of detecting an extinction ratio of an optical signal, characterized by, The optical receiving assembly comprises an optical-electric converter, a current detection circuit, a transimpedance amplifier, an electric receiving circuit, and a calculation circuit. The method for detecting the optical extinction ratio of the optical signal comprises: receiving a transimpedance gain from a gain control end of the transimpedance amplifier; receiving a direct current bias current from a current output end of the current detection circuit; receiving a voltage swing value from a voltage output end of the electric receiving circuit; receiving a gain value from a gain output end of the electric receiving circuit; determining an optical power swing value of the optical signal received by the optical receiving assembly according to the transimpedance gain, the voltage swing value, and the gain value, in combination with a temperature compensation value corresponding to a current system temperature of the optical receiving assembly; 18. The method of claim 17, wherein the extinction ratio of the optical signal is detected by: wherein the optical power swing value satisfies the following formula: wherein ER is the extinction ratio, I rssi is the direct current bias, V pp is the voltage swing, R tia is the transimpedance gain, G is the gain value.

19. The method for detecting the optical extinction ratio of the optical signal according to claim 17 or 18, wherein, the method for detecting the optical extinction ratio of the optical signal further comprises: determining the optical power swing value of the optical signal received by the optical receiving assembly according to the transimpedance gain, the voltage swing value, and the gain value, in combination with a temperature compensation value corresponding to a current system temperature of the optical receiving assembly; wherein the optical power swing value satisfies the following formula: P ran is the optical power swing value, V pp is the voltage swing value, R tia is the transimpedance gain, G is the gain value, and K is a temperature compensation value corresponding to the current system temperature of the optical receiving component.

20. The method for detecting the optical extinction ratio of the optical signal according to any one of claims 17-19, wherein, the method for detecting the optical extinction ratio of the optical signal further comprises: determining an average optical power of the optical signal received by the optical receiving assembly according to the direct current bias current, in combination with a temperature compensation value corresponding to a current system temperature of the optical receiving assembly; wherein the average optical power satisfies the following formula: P ave = I rssi x K, P ave is the average optical power, I rssi is the direct current bias current, and K is a temperature compensation value corresponding to the current system temperature of the optical receiving component.

21. The method for detecting the optical extinction ratio of the optical signal according to claim 19 or 20, wherein, The temperature compensation value K corresponding to the current system temperature of the light receiving assembly satisfies the following relationship: where R is the photoelectric conversion efficiency of the photoelectric converter, p oil is the insertion loss of the light receiving assembly, and M is the multiplication factor of the photoelectric converter.

22. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program or instructions, and when the computer program or instructions run on the computer, the computer executes the extinction ratio detection method of the optical signal according to any one of claims 17-21.

23. A computer program product, characterised in that, When the computer program product runs on the computer, the computer executes the extinction ratio detection method of the optical signal according to any one of claims 17-21.

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