Optical performance detection device and related method and system

Abstract

The embodiment of the invention discloses an optical performance detection device and a related method and system. Through the optical coding module, the optical signal of each wavelength in the input multi-wavelength optical signals has a unique corresponding light intensity distribution characteristic, that is to say, the distribution characteristics of the light intensity of the optical signals with different wavelengths in the space are different after the optical signals pass through the optical coding module. Therefore, based on the characteristics of space division multiplexing, the optical detection module can detect the optical signals of multiple wavelengths at the same time, and the processing control module can identify the optical signal of each wavelength according to the detection result and calculate the power of the optical signal of each wavelength. Therefore, the optical performance detection device designed by the invention realizes simultaneous detection of optical signals with multiple wavelengths through a space division multiplexing mode, shortens the detection time, and is beneficial to meeting the requirement of high-speed detection.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of optical performance detection, and in particular, to an optical performance detection device and related methods and systems. Background Art

[0002] With the development of society and the rapid progress of artificial intelligence, the resulting information explosion has put forward higher requirements for the transmission and processing of information, such as lower cost, lower latency and higher bandwidth. The update of information transmission index specifications has made the optical network architecture increasingly complex.

[0003] In order to ensure the reliability and confidentiality of information transmission, in addition to continuously improving the performance indicators of devices in the network, the detection of information transmitted in the optical network must also be improved, such as faster detection speed, lower detection cost and bandwidth expansion cost. However, the existing technology usually uses sequential logic to detect optical signals, that is, it is necessary to detect optical signals of different wavelengths one by one, which takes a lot of time and is difficult to meet the needs of high-speed detection. Summary of the invention

[0004] The embodiments of the present application provide an optical performance detection device and related methods and systems, which realize the simultaneous detection of optical signals of multiple wavelengths through space division multiplexing, shorten the detection time, and are conducive to meeting the needs of high-speed detection.

[0005] In a first aspect, an embodiment of the present application provides an optical performance detection device, which includes: an optical input module, an optical encoding module, an optical detection module and a processing and control module. Specifically, the optical input module is used to transmit an input first optical signal to the optical encoding module, and the first optical signal includes optical signals of multiple wavelengths. The first area of ​​the optical encoding module is used to adjust the light intensity distribution of the first optical signal at a first moment to obtain a second optical signal, wherein the light intensity distribution of any two wavelengths of the optical signal in the second optical signal is different. The optical detection module is used to detect the second optical signal to obtain the light intensity distribution of the second optical signal. The processing and control module is used to determine the power of the optical signal of each wavelength in the first optical signal according to the light intensity distribution of the second optical signal.

[0006] In this embodiment, the optical coding module is used to make each wavelength of the input multi-wavelength optical signal have a unique corresponding light intensity distribution feature, that is, after passing through the optical coding module, the light intensity distribution characteristics of the optical signals of different wavelengths in space are also different. Therefore, based on the characteristics of this space division multiplexing, the optical detection module can detect optical signals of multiple wavelengths at the same time, and the processing and control module can identify the optical signal of each wavelength according to the detection results and calculate the power of the optical signal of each wavelength. It can be seen that the optical performance detection device designed in this application realizes the detection of optical signals of multiple wavelengths at the same time through space division multiplexing, shortens the detection time, and is conducive to meeting the needs of high-speed detection.

[0007] In some possible implementations, light intensity distributions of optical signals of any two wavelengths in the second optical signal are orthogonal to improve the accuracy of optical property detection.

[0008] In some possible implementations, the second region of the optical encoding module is used to adjust the light intensity distribution of the first optical signal at the second moment to obtain a third optical signal, wherein the light intensity distributions of any two wavelengths of the third optical signal are different. The optical detection module is used to detect the third optical signal to obtain the light intensity distribution of the third optical signal. The processing and control module is used to determine the power of the optical signal of each wavelength in the first optical signal based on the light intensity distribution of the second optical signal and the light intensity distribution of the third optical signal. In this implementation, the optical encoding module can process the optical signals of all wavelengths from the optical input module in a time-sharing and region-sharing manner, which is equivalent to the optical detection module being able to detect only part of the light intensity distribution of each wavelength optical signal each time, and the optical detection module can obtain the complete light intensity distribution of each wavelength optical signal by multiple time-sharing detections. In this way, since the optical detection module adopts a time-sharing detection method, a smaller optical detection module can be used.

[0009] In some possible implementations, the transmission coefficient of the first optical signal passing through the optical encoding module at the first moment is different from the transmission coefficient of the first optical signal passing through the optical encoding module at the second moment, and / or the reflection coefficient of the first optical signal passing through the optical encoding module at the first moment is different from the reflection coefficient of the first optical signal passing through the optical encoding module at the second moment. Specifically, the transmission coefficient and / or reflection coefficient of the multi-wavelength optical signal passing through the optical encoding module at different moments can be different by applying corresponding current or voltage to the optical encoding module at different moments, thereby achieving dynamic adjustment of the optical encoding module in time and region, which is conducive to improving the flexibility of the implementation method.

[0010] In some possible implementations, the optical input module is also used to transmit the input fourth optical signal to the optical coding module, and the fourth optical signal includes optical signals of multiple wavelengths, and the wavelength of the first optical signal is different from the wavelength of the fourth optical signal. The first area of ​​the optical coding module is also used to adjust the light intensity distribution of the fourth optical signal at the third moment to obtain a fifth optical signal, wherein the light intensity distributions of any two wavelengths of the fifth optical signal are different. The optical detection module is used to detect the fifth optical signal to obtain the light intensity distribution of the fifth optical signal. The processing and control module is also used to determine the power of each wavelength of the optical signal in the fourth optical signal based on the light intensity distribution of the fifth optical signal. In this implementation, the optical coding module can also process the optical signal from the optical input module in a time-sharing and wavelength-sharing manner, which expands the scenarios to which this solution is applicable.

[0011] In some possible implementations, the optical input module includes a plurality of input ports, each input port is used to input an optical signal of at least one wavelength, and the optical performance detection device further includes an isolation module, and the isolation module is located between the optical encoding module and the optical detection module. The isolation module is used to isolate the optical signals from each two adjacent input ports, so that the optical signal from each input port has an independent transmission space during the transmission from the optical encoding module to the optical detection module, thereby eliminating or suppressing the cross noise generated by the optical signals from different input ports after passing through the optical encoding module.

[0012] In some possible implementations, the wavelengths of optical signals input from every two adjacent input ports are different, so as to avoid interference caused by coherence characteristics between wavelengths.

[0013] In some possible implementations, the optical performance detection device further includes a polarization beam splitter. The polarization beam splitter is used to perform polarization beam splitting on the optical signal of each wavelength in the first optical signal to obtain two polarized optical signals with mutually orthogonal polarization states, wherein the two polarized optical signals are transmitted to the optical encoding module. In this way, it can be ensured that the input optical signal of any polarization state can be completely detected, which is conducive to avoiding detection errors caused by the input optical signal of any polarization state.

[0014] In some possible implementations, the optical performance detection device further includes a reflective element. The reflective element is used to reflect the two polarized lights to the optical encoding module. The polarization beam splitter, the optical encoding module, and the optical detection module are arranged in the reflection direction of the two polarized lights, thereby improving the compactness of the optical performance detection device.

[0015] In some possible implementations, the optical performance detection device further includes a spectrometer and a power detector. The spectrometer is used to split the first optical signal, and transmit the first optical signal after the splitting to the optical coding module, and transmit the second optical signal after the splitting to the power detector. The power detector is used to detect the optical power of the second optical signal, and transmit the optical power of the second optical signal to the processing control module.

[0016] In some possible implementations, the processing control module is specifically used to: obtain prior information, the prior information including the light intensity distribution corresponding to each wavelength of the optical signal after passing through the optical encoding module. Determine the wavelength and relative intensity information of each optical signal in the first optical signal according to the prior information and the light intensity distribution of the second optical signal. Determine the power of each wavelength of the optical signal in the first optical signal according to the optical power of the second optical signal and the relative intensity information of each wavelength of the optical signal in the first optical signal.

[0017] In some possible implementations, the processing control module is further used to control the detection duration and detection area of ​​the light detection module, so as to flexibly control the working mode of the light detection module according to actual conditions.

[0018] In some possible implementations, the first optical signal is scattered and interfered by the optical coding module. By designing the optical coding module, optical signals of different wavelengths can be scattered and interfered in different ways by passing through the optical coding module, thereby making the light intensity distribution of optical signals of different wavelengths different.

[0019] In some possible implementations, the optical input module is an optical fiber array, and the optical fiber types used in the optical fiber array include but are not limited to polarization-maintaining optical fiber and single-mode optical fiber, which enriches the implementation methods of this solution.

[0020] In the second aspect, an embodiment of the present application provides an optical performance detection method, which is applied to an optical performance detection device, and the optical performance detection device includes an optical input module, an optical coding module, an optical detection module and a processing control module. The optical performance detection method includes the following steps. The input first optical signal is transmitted to the optical coding module through the optical input module, and the first optical signal includes optical signals of multiple wavelengths. The light intensity distribution of the first optical signal is adjusted at a first moment through the first area of ​​the optical coding module to obtain a second optical signal, wherein the light intensity distribution of any two wavelengths of the optical signal in the second optical signal is different. The second optical signal is detected by the optical detection module to obtain the light intensity distribution of the second optical signal. The power of the optical signal of each wavelength in the first optical signal is determined by the processing control module and based on the light intensity distribution of the second optical signal.

[0021] In some possible implementations, light intensity distributions of optical signals of any two wavelengths in the second optical signal are orthogonal.

[0022] In some possible implementations, the method further includes: adjusting the light intensity distribution of the first optical signal at the second moment through the second region of the optical encoding module to obtain a third optical signal, wherein the light intensity distributions of any two wavelengths of the optical signal in the third optical signal are different. Detecting the third optical signal through the optical detection module to obtain the light intensity distribution of the third optical signal. Determining the power of the optical signal of each wavelength in the first optical signal through the processing control module and based on the light intensity distribution of the second optical signal includes: determining the power of the optical signal of each wavelength in the first optical signal through the processing control module based on the light intensity distribution of the second optical signal and the light intensity distribution of the third optical signal.

[0023] In some possible embodiments, the transmission coefficient of the first optical signal passing through the optical encoding module at the first moment is different from the transmission coefficient of the first optical signal passing through the optical encoding module at the second moment, and / or the reflection coefficient of the first optical signal passing through the optical encoding module at the first moment is different from the reflection coefficient of the first optical signal passing through the optical encoding module at the second moment.

[0024] In some possible implementations, the method further includes: transmitting the input fourth optical signal to the optical coding module through the optical input module, the fourth optical signal includes optical signals of multiple wavelengths, and the wavelength of the first optical signal is different from the wavelength of the fourth optical signal. The light intensity distribution of the fourth optical signal is adjusted at the third moment through the first area of ​​the optical coding module to obtain a fifth optical signal, wherein the light intensity distributions of any two wavelengths of the optical signal in the fifth optical signal are different. The fifth optical signal is detected by the optical detection module to obtain the light intensity distribution of the fifth optical signal. The power of the optical signal of each wavelength in the fourth optical signal is determined by the processing and control module according to the light intensity distribution of the fifth optical signal.

[0025] In some possible implementations, the optical input module includes a plurality of input ports, each input port is used to input an optical signal of at least one wavelength, and the optical performance detection device further includes an isolation module, and the isolation module is located between the optical encoding module and the optical detection module. The method further includes: isolating the optical signals from each two adjacent input ports by the isolation module, so that the optical signal from each input port has an independent transmission space during the transmission from the optical encoding module to the optical detection module.

[0026] In some possible implementations, wavelengths of optical signals input from every two adjacent input ports are different.

[0027] In some possible implementations, the optical performance detection device further includes a polarization beam splitter. The method further includes: performing polarization beam splitting on each wavelength of the optical signal in the first optical signal by the polarization beam splitter to obtain two polarized optical signals with mutually orthogonal polarization states, wherein the two polarized optical signals are transmitted to the optical encoding module.

[0028] In some possible implementations, the optical performance detection device further includes a reflective element. The method further includes: reflecting the two polarized lights to the optical encoding module through the reflective element. The polarization beam splitter, the optical encoding module and the optical detection module are arranged in the reflection direction of the two polarized lights.

[0029] In some possible implementations, the optical performance detection device further includes a spectrometer and a power detector. The method further includes: splitting the first optical signal by the spectrometer, transmitting the split first optical signal to the optical coding module, and transmitting the split second optical signal to the power detector. Detecting the optical power of the second optical signal by the power detector, and transmitting the optical power of the second optical signal to the processing control module.

[0030] In some possible implementations, determining the power of each wavelength of the optical signal in the first optical signal by processing the control module and according to the light intensity distribution of the second optical signal includes: acquiring a priori information by processing the control module, the a priori information including the light intensity distribution corresponding to each wavelength of the optical signal after passing through the optical encoding module. Determining the wavelength and relative intensity information of each optical signal in the first optical signal by processing the control module according to the a priori information and the light intensity distribution of the second optical signal. Determining the power of each wavelength of the optical signal in the first optical signal by processing the control module according to the optical power of the second optical signal and the relative intensity information of each wavelength of the optical signal in the first optical signal.

[0031] In a third aspect, an embodiment of the present application provides an optical signal transmission system, which includes: a combiner, an optical amplifier, a demultiplexer, and an optical performance detection device as described in any embodiment of the first aspect. The combiner is used to combine multiple input optical signals to obtain a combined optical signal. The optical amplifier is used to amplify the combined optical signal. The demultiplexer is used to demultiplex the amplified combined optical signal. The optical performance detection device is used to perform optical power detection on the combined optical signal before and / or after amplification.

[0032] It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

[0033] The optical performance detection device designed in the present application includes an optical input module, an optical coding module, an optical detection module and a processing and control module. The optical coding module enables each wavelength of the input multi-wavelength optical signal to have a unique corresponding light intensity distribution feature, that is, after passing through the optical coding module, the light intensity distribution characteristics of the optical signals of different wavelengths in space are also different. Therefore, based on the characteristics of this space division multiplexing, the optical detection module can detect optical signals of multiple wavelengths at the same time, and the processing and control module can identify the optical signal of each wavelength according to the detection results and calculate the power of the optical signal of each wavelength. It can be seen that the optical performance detection device designed in the present application realizes the detection of optical signals of multiple wavelengths at the same time through space division multiplexing, shortens the detection time, and is conducive to meeting the needs of high-speed detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the first structure of the optical performance detection device in the embodiment of the present application;

[0035] Figure 2 This is a schematic diagram comparing the light intensity distribution of the optical signal before and after it passes through the optical coding module in the embodiment of the present application;

[0036] Figure 3 A schematic diagram of adjusting light intensity distribution by time and region in an embodiment of the present application;

[0037] Figure 4 This is a schematic diagram of the second structure of the optical performance detection device in the embodiment of the present application;

[0038] Figure 5 This is a schematic diagram of the third structure of the optical performance detection device in the embodiment of the present application;

[0039] Figure 6 This is a schematic diagram of the fourth structure of the optical performance detection device in the embodiment of the present application;

[0040] Figure 7 This is a fifth structural schematic diagram of the optical performance detection device in the embodiment of the present application;

[0041] Figure 8 A schematic diagram of an embodiment of a method for detecting light performance in an embodiment of the present application;

[0042] Fig. 9 Schematic diagram of an optical signal transmission system in an embodiment of the present application. DETAILED DESCRIPTION

[0043] The embodiment of the present application provides a kind of optical performance detection device and related method and system, realizes the detection of optical signals of multiple wavelengths at the same time by space division multiplexing mode, shortens the detection time, and is conducive to meeting the demand of high-speed detection. It should be noted that the terms "first", "second", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable in appropriate circumstances, so that the embodiments described here can be implemented in an order other than the content illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0044] Figure 1 Schematic diagram of the first structure of the optical performance detection device in the embodiment of the present application. Figure 1 As shown, the optical performance detection device includes: an optical input module 10, an optical encoding module 20, an optical detection module 30 and a processing control module 40. It should be understood that the optical performance detection device provided in the embodiment of the present application is an optical power or light intensity detection for optical signals of different wavelengths, which is a detection of optical performance, and does not detect the service signals carried by the light.

[0045] The optical signal input by the optical input module 10 is a multi-wavelength optical signal. As an example, the optical input module 10 includes a plurality of input ports, each of which is used to input an optical signal of at least one wavelength. It should be noted that in order to avoid interference caused by the coherence characteristics between wavelengths, the wavelengths of the optical signals input by each two adjacent input ports are different. Figure 1 For example, the optical input module 10 includes four input ports, input port 1 inputs a C-band optical signal, input port 2 inputs an L-band optical signal, input port 3 inputs a C-band optical signal, and input port 4 inputs an L-band optical signal. It should be understood that the present application does not limit the specific implementation of the optical input module 10. For example, the optical input module 10 is an optical fiber array. In order to minimize the crosstalk caused by interference, the distance between the optical fibers in the optical fiber array is maintained at the millimeter level. The rear end of the optical fiber array can also be connected to a spatial collimator to collimate the incident optical signal, and the spatial isolator is then connected after the collimator to reduce interference caused by reflection. Among them, the types of optical fibers used in the optical fiber array include but are not limited to polarization-maintaining fibers and single-mode fibers.

[0046] The optical coding module 20 is a device that can adjust the light intensity distribution of the incident light. The light intensity distribution of any two wavelengths of the multi-wavelength optical signal processed by the optical coding module 20 is different. It should be understood that by designing the optical coding module 20, the light signals of different wavelengths can be scattered and interfered in different ways after passing through the optical coding module 20, so that the light intensity distribution of the light signals of different wavelengths is different. For example, the optical coding module 20 can use a coding medium related to the wavelength intensity, such as a coding medium composed of scattering particles at the nanometer or micro level. For another example, the optical coding module 20 can also use a designable metasurface structure. Among them, the optical coding module 20 can adopt a forward design, that is, the optical coding module 20 is designed according to the predetermined light intensity distribution of each wavelength light signal. Alternatively, the optical coding module 20 can also adopt a random design, and after the design is completed, the light intensity distribution of each wavelength light signal after passing through the optical coding module 20 is detected.

[0047] Figure 2 Schematic diagram showing the comparison of the light intensity distribution of the optical signal before and after passing through the optical coding module in the embodiment of the present application. Figure 2 As shown, the light intensity distribution of the optical signal before it is input into the optical encoding module 20 is Gaussian distribution, and the light intensity distribution of the optical signal after it passes through the optical encoding module 20 is speckle.

[0048] It should be noted that the optical encoding module 20 is designed to make the light intensity distribution of any two wavelengths of the multi-wavelength optical signal orthogonal, so as to improve the accuracy of optical performance detection. It should be understood that the light intensity distribution of each wavelength optical signal in two dimensions can be arranged into a one-dimensional vector, and the correlation between the one-dimensional vectors corresponding to the different wavelength optical signals is calculated by the Pearson function, wherein the closer the calculation result is to 0, the more the light intensity distribution of the two wavelength optical signals conforms to the orthogonal characteristic, and the calculation result is usually required to be less than 0.5.

[0049] The optical detection module 30 is used to detect the multi-wavelength optical signal passing through the optical encoding module 20 to obtain the light intensity distribution corresponding to each wavelength optical signal. The optical detection module 30 sends the detection result to the processing control module 40, and the processing control module 40 determines the optical power of each wavelength optical signal in the multi-wavelength optical signal according to the detection result. Among them, a plurality of pixels are distributed on the optical detection module 30. For example, the optical detection module 30 can be a photodiode (PD) array. For another example, the optical detection module 30 can be a focal plane detector. It should be understood that the sum of the light intensity distribution corresponding to the optical signal under different optical powers is linear, and the sum of the light intensity distribution represents the sum of the light intensity under the light intensity distribution of the optical signal. The optical power and the sum of the light intensity distribution have the following relationship: y=a*x+b, wherein y represents the optical power, x represents the sum of the light intensity distribution, and a and b can be obtained by verification. Therefore, the processing control module 40 can calculate the optical power of each wavelength optical signal according to the light intensity distribution corresponding to each wavelength optical signal fed back by the optical detection module 30.

[0050] It should be noted that, in the scenario where the optical input module 10 includes multiple input ports, the optical performance detection device also includes multiple Figure 1 The isolation module shown is located between the optical encoding module 20 and the optical detection module 30, and the isolation module can be made of dark light-absorbing material. The isolation module is used to isolate the optical signals from each two adjacent input ports, so that the optical signal from each input port has an independent transmission space during the transmission from the optical encoding module 20 to the optical detection module 30, thereby eliminating or suppressing the cross noise generated by the optical signals from different input ports after passing through the optical encoding module 20.

[0051] It should be understood that the detection area of ​​the light detection module 30 is related to the divergence angle of the light signal after passing through the light encoding module 20. The larger the divergence angle of the light signal after passing through the light encoding module 20, the larger the detection area of ​​the light detection module 30. In some possible scenarios, the processing control module 40 is also used to send a control signal to the light detection module 30 to control the duration of the light detection module 30 and the area for detection. For example, the processing control module 40 can control the size of the area opened for detection on the light detection module 30 according to the number of input ports that actually transmit light signals in the light input module 10. For another example, the processing control module 40 can control the duration of the light detection module 30 for detection according to the optical power of the light signal. If the optical power of the light signal is large, the detection duration of the light detection module 30 can be shorter, that is, the exposure duration is reduced. For another example, if the processing control module 40 finds that the calculation result is inaccurate, it may be caused by overexposure. The processing control module 40 can also control the light detection module 30 to reduce the exposure duration.

[0052] In the embodiment of the present application, the optical coding module 20 can simultaneously process the multi-wavelength optical signals from the optical input module 10 to adjust the light intensity distribution of each wavelength optical signal. It should be understood that a certain degree of time deviation can also be allowed here, that is, the processing completed within the allowed time range can be understood as being performed simultaneously. Through the optical coding module, each wavelength optical signal in the input multi-wavelength optical signal has a unique corresponding light intensity distribution feature, that is, the light intensity distribution characteristics of different wavelength optical signals in space after passing through the optical coding module are also different. Therefore, based on the characteristics of this space division multiplexing, the optical detection module can detect optical signals of multiple wavelengths at the same time, and the processing and control module can identify the optical signal of each wavelength according to the detection results and calculate the power of the optical signal of each wavelength. It can be seen that the optical performance detection device designed in the present application realizes the detection of optical signals of multiple wavelengths at the same time through space division multiplexing, shortens the detection time, and is conducive to meeting the needs of high-speed detection.

[0053] In a first possible implementation, the optical encoding module 20 processes optical signals of all wavelengths from the optical input module 10 simultaneously, and correspondingly, the optical detection module 30 detects optical signals of all wavelengths passing through the optical encoding module 20 simultaneously, thereby realizing light intensity distribution detection of optical signals of all wavelengths through a one-time operation.

[0054] In a second possible implementation, the optical encoding module 20 can also process the optical signals of all wavelengths from the optical input module 10 in a time-sharing and region-sharing manner. Specifically, the transmission coefficient and / or reflection coefficient of the multi-wavelength optical signal passing through the optical encoding module 20 at different times can be different by applying corresponding currents or voltages to the optical encoding module 20 at different times, thereby realizing the time-sharing and region-sharing dynamic adjustment of the optical encoding module 20. In other words, the area corresponding to each moment on the optical encoding module allows the optical signal to pass through, and the optical signals of all wavelengths from the optical input module 10 are processed simultaneously based on the area corresponding to each moment. Correspondingly, the optical detection module 30 also detects the optical signals of all wavelengths passing through the optical encoding module 20 in a time-sharing manner. In other words, although only part of the area of ​​the optical encoding module 20 allows the optical signal to pass through at each moment, the optical signals of all wavelengths are processed at the same time at each moment, which is equivalent to that the optical detection module 30 can only detect part of the light intensity distribution of each wavelength optical signal each time, and the optical detection module 30 can obtain the complete light intensity distribution of each wavelength optical signal through multiple detections in a time-sharing manner. Thus, since the light detection module 30 adopts a time-sharing detection method, compared with the first embodiment described above, the second embodiment can adopt a smaller light detection module 30 . An example is provided below.

[0055] Figure 3Schematic diagram of adjusting the light intensity distribution in different time periods and regions in the embodiment of the present application. Figure 3 As shown in (a), the optical coding module 20 adjusts the light intensity distribution of the incident multi-wavelength optical signal at four moments. For example, the optical coding module 20 adjusts the light intensity distribution of the multi-wavelength optical signal through region 1 at moment t1, the optical coding module 20 adjusts the light intensity distribution of the multi-wavelength optical signal through region 2 at moment t2, the optical coding module 20 adjusts the light intensity distribution of the multi-wavelength optical signal through region 3 at moment t3, and the optical coding module 20 adjusts the light intensity distribution of the multi-wavelength optical signal through region 4 at moment t4. Correspondingly, the optical detection module 30 detects the light intensity distribution of the optical signal passing through four different regions on the optical coding module 20 four times. The optical detection module 30 only needs to detect part of the light intensity distribution of each wavelength optical signal at a time, which can be achieved by using a miniaturized optical detection module 30. Furthermore, the optical detection module 30 sends the four detection results to the processing and control module 40, and the processing and control module 40 can obtain the complete light intensity distribution of each wavelength optical signal based on the four detection results, as shown in FIG. Figure 3 As shown in (b) in .

[0056] In a third possible implementation, the optical encoding module 20 may also process the optical signal from the optical input module 10 in a time-division and wavelength-division manner. For example, the multi-wavelength optical signal includes λ1-λ 10 There are 10 wavelengths of optical signals in total. The optical encoding module 20 adjusts the light intensity distribution of the optical signals of 5 wavelengths of λ1-λ5 at time t1, and the optical encoding module 20 adjusts the light intensity distribution of the optical signals of λ6-λ7 at time t2. 10 The light intensity distribution of the other five wavelengths of the light signal is adjusted. Accordingly, the light detection module 30 detects the light intensity distribution of the five wavelengths of the light signal of λ1-λ5 and the light intensity distribution of the five wavelengths of λ6-λ7 in two times. 10 In one possible application scenario, the optical coding module 20 does not process in different regions on the basis of time division and wavelength division, that is, the optical coding module 20 adjusts the light intensity distribution of the incident optical signal through all regions at every moment. In another possible application scenario, the optical coding module 20 can also process in different regions on the basis of time division and wavelength division. For example, for optical signals of five wavelengths of λ1-λ5, the optical coding module 20 adopts a similar Figure 3 The implementation method is divided into 4 moments and corresponding 4 regions for processing; for λ6-λ 10 The optical coding module 20 uses a similar method to Figure 3 The implementation method is divided into another 4 moments and corresponding 4 areas for processing.

[0057] It should be noted that in the above Figure 1On the basis of the optical performance detection device shown, the optical performance detection device may also include other devices, which will be further introduced below.

[0058] Figure 4 Schematic diagram of the second structure of the optical performance detection device in the embodiment of the present application. Figure 4 As shown, the optical performance detection device also includes: a spectrometer 50 and a power detector 60. The spectrometer 50 is used to split the multi-wavelength optical signal from the optical input module 10, wherein the spectrometer 50 performs splitting based on energy, that is, the two optical signals after splitting by the spectrometer 50 both include all wavelengths. One of the optical signals after splitting is transmitted to the optical coding module 20, and the other optical signal after splitting is transmitted to the power detector 60. It should be understood that the present application does not limit the splitting ratio of the spectrometer 50. Under normal circumstances, most of the optical signals after splitting are transmitted to the optical coding module 20, and a small part of the optical signals after splitting are transmitted to the power detector 60. The power detector 60 detects the optical power of the input optical signal and sends the detected optical power to the processing and control module 40. Specifically, the processing and control module 40 can obtain prior information in advance through experiments. The prior information refers to the light intensity distribution corresponding to each wavelength optical signal after passing through the optical encoding module 20. The processing and control module 40 can determine the wavelength of each optical signal in the multi-wavelength optical signal from the optical input module 10 according to the prior information and the actual detection result of the optical detection module 30, and calculate the relative intensity information of each wavelength optical signal. Then, the processing and control module 40 calculates the total input optical power of the multi-wavelength optical signal from the optical input module 10 according to the detection result of the power detector 60 and the splitting ratio of the splitter 50, and then calculates the absolute optical power of each wavelength optical signal according to the total input optical power and the relative intensity information of each wavelength optical signal.

[0059] Figure 5 FIG. 1 is a schematic diagram of the third structure of the optical performance detection device in the embodiment of the present application. Figure 5 As shown, the optical performance detection device further includes a polarization beam splitter 70, which is located between the beam splitter 50 and the optical encoding module 20. The polarization beam splitter 70 is used to polarize each wavelength optical signal input to obtain two polarized optical signals with mutually orthogonal polarization states. In this way, it can be ensured that the input optical signal of any polarization state can be completely detected, which is conducive to avoiding the detection error caused by the input optical signal of any polarization state.

[0060] Figure 6 Schematic diagram of the fourth structure of the optical performance detection device in the embodiment of the present application. Figure 6As shown, the optical performance detection device further includes a reflective element 80, which is used to reflect two polarized light signals corresponding to each wavelength light signal after passing through the polarization beam splitter 70 to the optical encoding module 20. The polarization beam splitter 70, the optical encoding module 20 and the optical detection module 30 are arranged in the reflection direction of the polarized light signal. For example, the direction in which the multi-wavelength light signal is input into the optical input module 10 is defined as the X direction, and the reflection direction is defined as the Z direction, and the X direction and the Z direction are perpendicular to each other. Figure 6 The optical path shown can be understood as a side view of the optical property detection device.

[0061] Figure 7 This is a fifth structural diagram of the optical performance detection device in the embodiment of the present application. Figure 7 As shown, it can be understood as a top view of the optical performance detection device, and the Y direction is perpendicular to the X direction and the Z direction respectively. In the top view direction of the optical performance detection device, that is, on the plane where the X direction and the Y direction are located, the polarization beam splitter 70 performs polarization beam splitting on each wavelength optical signal input. For example, the polarization beam splitter 70 transmits light in polarization state 1 and reflects light in polarization state 2, and polarization state 1 and polarization state 2 are orthogonal to each other. It should be understood that the present application does not limit the number of polarization beam splitters 70. In practical applications, the polarization beam splitters can correspond to the input ports one by one, or the polarization beam splitters can also cover multiple input ports.

[0062] The optical performance detection method provided in the embodiment of the present application is introduced below.

[0063] Figure 8 Schematic diagram of an embodiment of the optical performance detection method in the embodiment of the present application. It should be noted that the optical performance detection method is implemented based on the optical performance detection device introduced above. For the introduction of the optical performance detection device, please refer to the relevant description of the above embodiments, which will not be repeated here. In this example, the optical performance detection method includes the following steps.

[0064] 801. Input a multi-wavelength optical signal through an optical input module.

[0065] As an example, the optical input module includes multiple input ports, each of which is used to input an optical signal of at least one wavelength. It should be noted that in order to avoid interference caused by coherence characteristics between wavelengths, the wavelengths of the optical signals input by each two adjacent input ports are different.

[0066] 802. Split the multi-wavelength optical signal by using an optical splitter.

[0067] Optionally, the optical splitter splits the input multi-wavelength optical signal based on energy to obtain two optical signals, each optical signal includes all wavelengths, one optical signal is transmitted to the optical coding module, and the other optical signal is transmitted to the power detector.

[0068] 803. Detect the optical power by using a power detector.

[0069] Optionally, the power detector performs power detection on another optical signal after passing through the optical splitter, and transmits the detection result to the processing and control module.

[0070] 804. Perform polarization splitting on the input optical signal through a polarization beam splitter.

[0071] Optionally, one of the optical signals after passing through the optical splitter is transmitted to a polarization beam splitter, which performs polarization splitting on the input optical signal of each wavelength to obtain two mutually orthogonal polarized optical signals, and transmits the polarized optical signals to the optical encoding module.

[0072] 805. Adjust the light intensity distribution of the optical signal through the optical coding module.

[0073] The optical encoding module is used to adjust the light intensity distribution of the input multi-wavelength optical signal so that the light intensity distribution of any two wavelengths of the multi-wavelength optical signal is different. Furthermore, by designing the optical encoding module, the light intensity distribution of any two wavelengths of the multi-wavelength optical signal can be orthogonal to improve the accuracy of optical performance detection.

[0074] 806. Detect the light intensity distribution of the multi-wavelength optical signal through the optical detection module.

[0075] The optical detection module can obtain the light intensity distribution of each wavelength of the optical signal by detecting the multi-wavelength optical signal after passing through the optical encoding module.

[0076] 807. Determine the optical power of the optical signal of each wavelength in the multi-wavelength signal through the processing control module.

[0077] The processing control module can determine the optical power of each wavelength optical signal in the multi-wavelength optical signal according to the detection result of the optical detection module. Alternatively, the processing control module can also determine the optical power of each wavelength optical signal in the multi-wavelength optical signal in combination with the detection result of the optical detection module and the detection result of the power detector.

[0078] The application scenarios of the optical performance detection device are introduced below.

[0079] Fig. 9 Schematic diagram of an optical signal transmission system in an embodiment of the present application. Fig. 9As shown, the optical signal transmission system includes an optical performance detection device 101, a combiner 102, an optical amplifier 103 and a demultiplexer 104. The optical performance detection device 101 may be an optical performance detection device as described in any of the above embodiments. Specifically, the combiner 102 is used to combine the input multiple optical signals to obtain a combined optical signal, the optical amplifier 103 is used to amplify the combined optical signal, and the demultiplexer 104 is used to demultiplex the amplified combined optical signal. As an example, the optical performance detection device 101 is used to perform optical power detection on the combined optical signal before amplification. As another example, the optical performance detection device 101 is used to perform optical power detection on the combined optical signal after amplification. As yet another example, the optical performance detection device 101 performs optical power detection on the combined optical signal before and after amplification.

[0080] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A light performance detection device, characterized in that: include: Optical input module, optical encoding module, optical detection module and processing control module; The optical input module is used to transmit the input first optical signal to the optical encoding module, wherein the first optical signal includes optical signals of multiple wavelengths; The first region of the optical encoding module is used to adjust the light intensity distribution of the first optical signal at a first moment to obtain a second optical signal, wherein the light intensity distributions of any two wavelengths of optical signals in the second optical signal are different; The optical detection module is used to detect the second optical signal to obtain the light intensity distribution of the second optical signal; The processing and control module is used to determine the power of an optical signal of each wavelength in the first optical signal according to the light intensity distribution of the second optical signal.

2. The optical performance detection device according to claim 1, characterized in that: The light intensity distributions of the optical signals of any two wavelengths in the second optical signal are orthogonal.

3. The optical performance detection device according to claim 1 or 2, characterized in that: The second region of the optical encoding module is used to adjust the light intensity distribution of the first optical signal at a second moment to obtain a third optical signal, wherein the light intensity distributions of optical signals of any two wavelengths in the third optical signal are different; The optical detection module is used to detect the third optical signal to obtain the light intensity distribution of the third optical signal; The processing and control module is used to determine the power of the optical signal of each wavelength in the first optical signal according to the light intensity distribution of the second optical signal and the light intensity distribution of the third optical signal.

4. The optical performance detection device according to claim 3, characterized in that: The transmission coefficient of the first optical signal passing through the optical encoding module at the first moment is different from the transmission coefficient of the first optical signal passing through the optical encoding module at the second moment, and / or the reflection coefficient of the first optical signal passing through the optical encoding module at the first moment is different from the reflection coefficient of the first optical signal passing through the optical encoding module at the second moment.

5. The optical performance detection device according to any one of claims 1 to 4, characterized in that: The optical input module is further used to transmit an input fourth optical signal to the optical encoding module, wherein the fourth optical signal includes optical signals of multiple wavelengths, and the wavelength of the first optical signal is different from the wavelength of the fourth optical signal; The first region of the optical encoding module is further used to adjust the light intensity distribution of the fourth optical signal at a third moment to obtain a fifth optical signal, wherein the light intensity distributions of any two wavelengths of the fifth optical signal are different; The optical detection module is used to detect the fifth optical signal to obtain the light intensity distribution of the fifth optical signal; The processing and control module is further configured to determine the power of an optical signal of each wavelength in the fourth optical signal according to the light intensity distribution of the fifth optical signal.

6. The optical performance detection device according to any one of claims 1 to 5, characterized in that: The optical input module includes a plurality of input ports, each of which is used to input an optical signal of at least one wavelength. The optical performance detection device also includes an isolation module, which is located between the optical encoding module and the optical detection module. The isolation module is used to isolate the optical signals from every two adjacent input ports, so that the optical signal from each input port has an independent transmission space during the transmission from the optical encoding module to the optical detection module.

7. The optical performance detection device according to claim 6, characterized in that: The wavelengths of optical signals inputted by every two adjacent input ports are different.

8. The optical performance detection device according to any one of claims 1 to 7, characterized in that: The optical property detection device also includes a polarization beam splitter; The polarization beam splitter is used to perform polarization beam splitting on the optical signal of each wavelength in the first optical signal to obtain two polarized optical signals with mutually orthogonal polarization states, wherein the two polarized optical signals are transmitted to the optical encoding module.

9. The optical performance detection device according to claim 8, characterized in that: The optical property detection device further comprises a reflective element; The reflective element is used to reflect the two polarized lights to the optical encoding module, wherein the polarization beam splitter, the optical encoding module and the optical detection module are arranged in the reflection direction of the two polarized lights.

10. The optical property detection device according to any one of claims 1 to 9, characterized in that: The optical performance detection device also includes a spectrometer and a power detector; The optical splitter is used to split the first optical signal, and transmit the split first optical signal to the optical encoding module, and transmit the split second optical signal to the power detector; The power detector is used to detect the optical power of the second optical signal and transmit the optical power of the second optical signal to the processing and control module.

11. The optical performance detection device according to claim 10, characterized in that: The processing control module is specifically used for: Acquire prior information, the prior information including light intensity distribution corresponding to each wavelength of the optical signal after passing through the optical coding module; Determining the wavelength and relative intensity information of each optical signal in the first optical signal according to the prior information and the light intensity distribution of the second optical signal; The power of the optical signal of each wavelength in the first optical signal is determined according to the optical power of the second optical signal and the relative intensity information of the optical signal of each wavelength in the first optical signal.

12. A method for detecting optical properties, characterized in that: The method is applied to an optical performance detection device, which includes an optical input module, an optical encoding module, an optical detection module and a processing control module. The method includes: Transmitting an input first optical signal to the optical encoding module through the optical input module, wherein the first optical signal includes optical signals of multiple wavelengths; By adjusting the light intensity distribution of the first optical signal at a first moment through the first area of ​​the optical encoding module, a second optical signal is obtained, wherein the light intensity distributions of optical signals of any two wavelengths in the second optical signal are different; Detecting the second optical signal by the optical detection module to obtain the light intensity distribution of the second optical signal; The power of an optical signal of each wavelength in the first optical signal is determined by the processing and control module according to the light intensity distribution of the second optical signal.

13. The method according to claim 12, characterized in that The light intensity distributions of the optical signals of any two wavelengths in the second optical signal are orthogonal.

14. The method according to claim 12 or 13, characterized in that The method further comprises: Adjusting the light intensity distribution of the first optical signal at a second moment through the second area of ​​the optical encoding module to obtain a third optical signal, wherein the light intensity distributions of optical signals of any two wavelengths in the third optical signal are different; Detecting the third optical signal by the optical detection module to obtain the light intensity distribution of the third optical signal; Determining the power of an optical signal of each wavelength in the first optical signal by the processing and control module according to the light intensity distribution of the second optical signal includes: The power of the optical signal of each wavelength in the first optical signal is determined by the processing and control module according to the light intensity distribution of the second optical signal and the light intensity distribution of the third optical signal.

15. The method according to claim 14, characterized in that The transmission coefficient of the first optical signal passing through the optical encoding module at the first moment is different from the transmission coefficient of the first optical signal passing through the optical encoding module at the second moment, and / or the reflection coefficient of the first optical signal passing through the optical encoding module at the first moment is different from the reflection coefficient of the first optical signal passing through the optical encoding module at the second moment.

16. The method according to any one of claims 12 to 15, characterized in that The method further comprises: Transmitting an input fourth optical signal to the optical encoding module through the optical input module, wherein the fourth optical signal includes optical signals of multiple wavelengths, and the wavelength of the first optical signal is different from the wavelength of the fourth optical signal; A fifth optical signal is obtained by adjusting the light intensity distribution of the fourth optical signal at a third moment through the first region of the optical encoding module, wherein the light intensity distributions of optical signals of any two wavelengths in the fifth optical signal are different; Detecting the fifth optical signal by the optical detection module to obtain the light intensity distribution of the fifth optical signal; The power of the optical signal of each wavelength in the fourth optical signal is determined by the processing and control module according to the light intensity distribution of the fifth optical signal.

17. The method according to any one of claims 12 to 16, characterized in that The optical input module includes a plurality of input ports, each of which is used to input an optical signal of at least one wavelength. The optical performance detection device also includes an isolation module, which is located between the optical encoding module and the optical detection module. The method also includes: The optical signals from every two adjacent input ports are isolated by the isolation module, so that the optical signal from each input port has an independent transmission space during the transmission from the optical encoding module to the optical detection module.

18. The method according to claim 17, characterized in that The wavelengths of optical signals inputted by every two adjacent input ports are different.

19. The method according to any one of claims 12 to 18, characterized in that The optical performance detection device further includes a polarization beam splitter, and the method further includes: The polarization beam splitter performs polarization splitting on the optical signal of each wavelength in the first optical signal to obtain two polarized optical signals with mutually orthogonal polarization states, wherein the two polarized optical signals are transmitted to the optical encoding module.

20. The method according to claim 19, characterized in that The optical property detection device further includes a reflective element, and the method further includes: The two polarized lights are reflected to the optical encoding module by the reflective element, wherein the polarization beam splitter, the optical encoding module and the optical detection module are arranged in the reflection direction of the two polarized lights.

21. The method according to any one of claims 12 to 20, characterized in that The optical performance detection device further includes a spectrometer and a power detector, and the method further includes: Splitting the first optical signal through the optical splitter, transmitting the first optical signal after the splitting to the optical encoding module, and transmitting the second optical signal after the splitting to the power detector; The optical power of the second optical signal is detected by the power detector, and the optical power of the second optical signal is transmitted to the processing and control module.

22. The method according to claim 21, characterized in that Determining the power of an optical signal of each wavelength in the first optical signal by the processing and control module according to the light intensity distribution of the second optical signal includes: Acquiring prior information through the processing control module, the prior information including the light intensity distribution corresponding to each wavelength of the optical signal after passing through the optical encoding module; Determining, by the processing and control module, the wavelength and relative intensity information of each optical signal in the first optical signal according to the prior information and the light intensity distribution of the second optical signal; The power of the optical signal of each wavelength in the first optical signal is determined by the processing and control module according to the optical power of the second optical signal and the relative intensity information of the optical signal of each wavelength in the first optical signal.

23. An optical signal transmission system, characterized in that: include: A combiner, an optical amplifier, a wavelength splitter, and an optical performance detection device as claimed in any one of claims 1 to 11; The combiner is used to combine the input multi-path optical signals to obtain a combined optical signal; The optical amplifier is used to amplify the combined optical signal; The demultiplexer is used to demultiplex the amplified combined optical signal; The optical performance detection device is used to perform optical power detection on the combined optical signal before and / or after the amplification.

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