Optical signal processing method, device and equipment

Abstract

The present invention provides an optical signal processing method, apparatus, and device, wherein the optical signal processing method includes: obtaining a first branch signal and a second branch signal of an optical signal to be measured; determining a first optical power of the first branch signal, and a second optical power of the second branch signal after passing through a filter; and determining the center wavelength of the optical signal to be measured based on the correspondence between the first optical power, the second optical power, and the filter parameters of the filter and the wavelength. This solution can separate a reference optical path and a detection optical path, thereby completing the detection of the optical signal; the implementation of this solution does not require coupling too many optical elements, the device cost is low, the operation and maintenance are simple, and it can adapt to harsh working environments; it effectively solves the problem of complex operation and maintenance of optical signal processing solutions for optical signal detection in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of optical signal processing, and in particular to an optical signal processing method, device and equipment. Background Art

[0002] The following solutions are mainly used in existing technologies for optical signal detection:

[0003] Solution 1: Spectrum Analyzer: This instrument uses dispersion, time delay, and interference to separate light into different wavelengths for measurement and analysis. Input light is decomposed by an optical wavelength decomposition device. A photoelectric converter collects each monochromatic light and converts it into an electrical signal. By scanning, the power of the optical signal at each wavelength is decomposed to produce a spectrum. Common spectroscopic methods include prism spectrometry and diffraction grating spectrometry.

[0004] Specifically, a prism or diffraction grating type spectrum analyzer uses the dispersion characteristics of light. When light passes through a prism or diffraction grating, light of different wavelengths is located in different spatial positions. The spectrum is obtained by detecting the optical signal power at different spatial positions.

[0005] Solution 2: Optical signal detection is performed using a fiber optic flange, an optical attenuator, a narrow-linewidth light source, a coupler, an isolator, a gain-flattening filter, and a wavelength monitoring assembly. The wavelength monitoring assembly consists of a ramp filter and a photodetector connected together. The fiber optic flange is used to connect the light source under test to the laser wavelength meter, allowing the light source under test to be connected to the laser wavelength meter through the fiber optic flange. The optical attenuator is connected to the other end of the fiber optic flange. The narrow-linewidth light source is connected to the optical attenuator via a coupler, and then enters the ramp filter through an isolator and a gain-flattening filter. The optical signal waveform is flattened after passing through the gain-flattening filter. After passing through the ramp filter, the optical power of light of different wavelengths will change, which is converted into an electrical signal output by the wavelength monitoring assembly. After data acquisition and A / D conversion, the real-time wavelength and corresponding parameters are calculated and compared with the standard wavelength and corresponding parameters recorded by the wavelength calibration light source. Based on this, the real-time optical wavelength output by the measured laser is calculated and read.

[0006] However, the above existing solutions have the following problems:

[0007] In Option 1, the spectrometer has the characteristics of high measurement accuracy, but it has high requirements on the travel of moving parts, requires coupling more optical elements, and is difficult to tune the optical path and align. Therefore, it is not suitable for use in harsh working environments. It has high accuracy and high price, and is large in size but inconvenient to carry.

[0008] In Solution 2, devices such as a reference light source and a gain flattening filter are required. Fluctuations in detection accuracy are affected by fluctuations in the performance of the reference light source, so it is necessary to consider providing a stable power supply and working environment for the reference light source.

[0009] As can be seen from the above, the optical signal processing solutions for optical signal detection in the prior art have the problem of complex operation and maintenance. Summary of the Invention

[0010] The object of the present invention is to provide an optical signal processing method, apparatus and device to solve the problem of complex operation and maintenance of optical signal processing solutions for optical signal detection in the prior art.

[0011] In order to solve the above technical problems, an embodiment of the present invention provides an optical signal processing method, including:

[0012] Acquire a first branch signal and a second branch signal of the optical signal to be measured;

[0013] Determining a first optical power of the first branch signal and a second optical power of the second branch signal after passing through a filter;

[0014] determining a central wavelength of the optical signal to be measured according to the first optical power, the second optical power, and a correspondence between the filtering parameters of the filter and the wavelength;

[0015] Wherein, the filtering parameter includes reflectivity or transmittance;

[0016] The filtering curve of the filter includes a first curve, the first curve continuously increases or continuously decreases within a first measurement range, and the spectral range of the optical signal to be measured is smaller than the first measurement range.

[0017] Optionally, before determining the center wavelength of the optical signal to be measured according to the first optical power, the second optical power, and the correspondence between the filtering parameter of the filter and the wavelength, the method further includes:

[0018] Acquire a first optical power ratio between the unfiltered second branch signal and the first branch signal;

[0019] The determining the center wavelength of the optical signal to be measured according to the first optical power, the second optical power, and the corresponding relationship between the filtering parameter of the filter and the wavelength includes:

[0020] The center wavelength of the optical signal to be measured is determined according to the first optical power ratio, the first optical power, the second optical power, and a correspondence between the filtering parameters of the filter and the wavelength.

[0021] Optionally, determining the center wavelength of the optical signal to be measured according to the first optical power ratio, the first optical power, the second optical power, and a correspondence between a filtering parameter of the filter and the wavelength includes:

[0022] Obtaining a second optical power ratio between the second optical power and the first optical power;

[0023] Obtaining a first ratio between a second optical power ratio and the first optical power ratio;

[0024] Acquire filtering parameters of the filter that match the first ratio;

[0025] The center wavelength of the optical signal to be measured is obtained according to the acquired filtering parameters and the corresponding relationship between the filtering parameters of the filter and the wavelength.

[0026] Optionally, also include:

[0027] Acquiring at least one third branch signal of the optical signal to be measured;

[0028] Sending the at least one third branch signal to a transmission device;

[0029] The third branch signal is another branch signal except the first branch signal and the second branch signal.

[0030] Optionally, obtaining the first branch signal and the second branch signal of the optical signal to be measured includes:

[0031] A first branch signal and a second branch signal of the optical signal to be measured are obtained through an optical splitter or an optical switch.

[0032] Optionally, determining the first optical power of the first branch signal and the second optical power of the second branch signal after passing through a filter includes:

[0033] Determine the first optical power of the first branch signal by a first optical power detector, and determine the second optical power of the second branch signal after passing through the filter by a second optical power detector; or,

[0034] The first optical power of the first branch signal and the second optical power of the second branch signal after passing through the filter are determined by a third optical power detector; wherein the third optical power detector is connected to a light combiner or an optical switch, and the first branch signal and the second branch signal respectively pass through the light combiner or the optical switch into the third optical power detector.

[0035] An embodiment of the present invention further provides an optical signal processing device, comprising:

[0036] A first acquisition module, configured to acquire a first branch signal and a second branch signal of the optical signal to be measured;

[0037] A first determining module is configured to determine a first optical power of the first branch signal and a second optical power of the second branch signal after passing through a filter;

[0038] a second determining module, configured to determine the center wavelength of the optical signal to be measured according to the first optical power, the second optical power, and a correspondence between the filtering parameters of the filter and the wavelength;

[0039] Wherein, the filtering parameter includes reflectivity or transmittance;

[0040] The filtering curve of the filter includes a first curve, the first curve continuously increases or continuously decreases within a first measurement range, and the spectral range of the optical signal to be measured is smaller than the first measurement range.

[0041] Optionally, also include:

[0042] a second acquisition module, configured to acquire a first optical power ratio between the unfiltered second branch signal and the first branch signal before determining the center wavelength of the optical signal to be measured based on the first optical power, the second optical power, and the correspondence between the filtering parameter of the filter and the wavelength;

[0043] The determining the center wavelength of the optical signal to be measured according to the first optical power, the second optical power, and the corresponding relationship between the filtering parameter of the filter and the wavelength includes:

[0044] The center wavelength of the optical signal to be measured is determined according to the first optical power ratio, the first optical power, the second optical power, and a correspondence between the filtering parameters of the filter and the wavelength.

[0045] Optionally, determining the center wavelength of the optical signal to be measured according to the first optical power ratio, the first optical power, the second optical power, and a correspondence between a filtering parameter of the filter and the wavelength includes:

[0046] Obtaining a second optical power ratio between the second optical power and the first optical power;

[0047] Obtaining a first ratio between a second optical power ratio and the first optical power ratio;

[0048] Acquire filtering parameters of the filter that match the first ratio;

[0049] The center wavelength of the optical signal to be measured is obtained according to the acquired filtering parameters and the corresponding relationship between the filtering parameters of the filter and the wavelength.

[0050] Optionally, also include:

[0051] A third acquisition module, configured to acquire at least one third branch signal of the optical signal to be measured;

[0052] A first sending module, configured to send the at least one third branch signal to a transmission device;

[0053] The third branch signal is another branch signal except the first branch signal and the second branch signal.

[0054] Optionally, obtaining the first branch signal and the second branch signal of the optical signal to be measured includes:

[0055] A first branch signal and a second branch signal of the optical signal to be measured are obtained through an optical splitter or an optical switch.

[0056] Optionally, determining the first optical power of the first branch signal and the second optical power of the second branch signal after passing through a filter includes:

[0057] Determine the first optical power of the first branch signal by a first optical power detector, and determine the second optical power of the second branch signal after passing through the filter by a second optical power detector; or,

[0058] The first optical power of the first branch signal and the second optical power of the second branch signal after passing through the filter are determined by a third optical power detector; wherein the third optical power detector is connected to a light combiner or an optical switch, and the first branch signal and the second branch signal respectively pass through the light combiner or the optical switch into the third optical power detector.

[0059] An embodiment of the present invention further provides an optical signal processing device, comprising: a processor and a transceiver;

[0060] The processor is configured to obtain a first branch signal and a second branch signal of the optical signal to be measured;

[0061] Determining a first optical power of the first branch signal and a second optical power of the second branch signal after passing through a filter;

[0062] determining a central wavelength of the optical signal to be measured according to the first optical power, the second optical power, and a correspondence between the filtering parameters of the filter and the wavelength;

[0063] Wherein, the filtering parameter includes reflectivity or transmittance;

[0064] The filtering curve of the filter includes a first curve, the first curve continuously increases or continuously decreases within a first measurement range, and the spectral range of the optical signal to be measured is smaller than the first measurement range.

[0065] Optionally, the processor is further configured to:

[0066] Before determining the center wavelength of the optical signal to be measured based on the first optical power, the second optical power, and the correspondence between the filtering parameter of the filter and the wavelength, obtaining a first optical power ratio between the unfiltered second branch signal and the first branch signal;

[0067] The determining the center wavelength of the optical signal to be measured according to the first optical power, the second optical power, and the corresponding relationship between the filtering parameter of the filter and the wavelength includes:

[0068] The center wavelength of the optical signal to be measured is determined according to the first optical power ratio, the first optical power, the second optical power, and a correspondence between the filtering parameters of the filter and the wavelength.

[0069] Optionally, determining the center wavelength of the optical signal to be measured according to the first optical power ratio, the first optical power, the second optical power, and a correspondence between a filtering parameter of the filter and the wavelength includes:

[0070] Obtaining a second optical power ratio between the second optical power and the first optical power;

[0071] Obtaining a first ratio between a second optical power ratio and the first optical power ratio;

[0072] Acquire filtering parameters of the filter that match the first ratio;

[0073] The center wavelength of the optical signal to be measured is obtained according to the acquired filtering parameters and the corresponding relationship between the filtering parameters of the filter and the wavelength.

[0074] Optionally, the processor is further configured to:

[0075] Acquiring at least one third branch signal of the optical signal to be measured;

[0076] Sending the at least one third branch signal to a transmission device through the transceiver;

[0077] The third branch signal is another branch signal except the first branch signal and the second branch signal.

[0078] Optionally, obtaining the first branch signal and the second branch signal of the optical signal to be measured includes:

[0079] A first branch signal and a second branch signal of the optical signal to be measured are obtained through an optical splitter or an optical switch.

[0080] Optionally, determining the first optical power of the first branch signal and the second optical power of the second branch signal after passing through a filter includes:

[0081] Determine the first optical power of the first branch signal by a first optical power detector, and determine the second optical power of the second branch signal after passing through the filter by a second optical power detector; or,

[0082] The first optical power of the first branch signal and the second optical power of the second branch signal after passing through the filter are determined by a third optical power detector; wherein the third optical power detector is connected to a light combiner or an optical switch, and the first branch signal and the second branch signal respectively pass through the light combiner or the optical switch into the third optical power detector.

[0083] An embodiment of the present invention further provides an optical signal processing device, comprising a memory, a processor, and a program stored in the memory and executable on the processor; when the processor executes the program, the above-mentioned optical signal processing method is implemented.

[0084] An embodiment of the present invention further provides a readable storage medium storing a program, which implements the steps of the above-mentioned optical signal processing method when executed by a processor.

[0085] The beneficial effects of the above technical solution of the present invention are as follows:

[0086] In the above scheme, the optical signal processing method obtains the first branch signal and the second branch signal of the optical signal to be measured; determines the first optical power of the first branch signal and the second optical power of the second branch signal after passing through a filter; determines the center wavelength of the optical signal to be measured based on the correspondence between the first optical power, the second optical power and the filtering parameters of the filter and the wavelength; wherein the filtering parameters include reflectivity or transmittance; the filtering curve of the filter includes a first curve, the first curve continuously increases or continuously decreases within a first range, and the spectral range of the optical signal to be measured is smaller than the first range; it is possible to separate a reference optical path (corresponding to the first branch signal) and a detection optical path (corresponding to the second branch signal), thereby completing the detection of the optical signal; the implementation of this scheme does not require coupling too many optical elements, the device cost is low, the operation and maintenance are simple, and it can adapt to harsh working environments; and this scheme does not require additional reference light sources, flat filters, etc., so that the measurement accuracy will not be affected by the characteristics of the reference light source and the flat filter, thereby ensuring the measurement accuracy as much as possible; it is a good solution to the problem of complex operation and maintenance of optical signal processing schemes for optical signal detection in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0087] Figure 1 Schematic diagram of the optical signal processing method according to an embodiment of the present invention;

[0088] Figure 2Schematic diagram of the optical signal processing method according to the embodiment of the present invention Figure 1 ;

[0089] Figure 3 Schematic diagram of the optical signal processing method according to the embodiment of the present invention Figure 2 ;

[0090] Figure 4 Schematic diagram of the optical signal processing method according to the embodiment of the present invention Figure 3 ;

[0091] Figure 5 Schematic diagram of the optical signal processing method according to the embodiment of the present invention Figure 4 ;

[0092] Figure 6 Schematic diagram of the optical signal processing method according to the embodiment of the present invention Figure 5 ;

[0093] Figure 7 Schematic diagram of the variation of reflectivity or transmittance of a slope filter with wavelength according to an embodiment of the present invention;

[0094] Figure 8 Schematic diagram of optical signal ratio changes with wavelength according to an embodiment of the present invention;

[0095] Figure 9 Schematic diagram of filtering principle of an embodiment of the present invention;

[0096] Figure 10 Schematic diagram of the structure of an optical signal processing device according to an embodiment of the present invention;

[0097] Figure 11 FIG. 4 is a schematic structural diagram of an optical signal processing device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0098] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0099] The present invention aims to solve the problem of complex operation and maintenance in the optical signal processing scheme for optical signal detection in the existing technology, and provides an optical signal processing method, such as Figure 1 As shown, including:

[0100] Step 11: Acquire a first branch signal and a second branch signal of the optical signal to be measured;

[0101] Step 12: Determine a first optical power of the first branch signal and a second optical power of the second branch signal after passing through a filter;

[0102] Step 13: Determine the center wavelength of the optical signal to be measured based on the correspondence between the first optical power, the second optical power, and the filtering parameters of the filter and the wavelength; wherein the filtering parameters include reflectivity or transmittance; the filtering curve of the filter includes a first curve, the first curve continuously increases or continuously decreases within a first measurement range, and the spectral range of the optical signal to be measured is smaller than the first measurement range.

[0103] The continuous increase or continuous decrease of the first curve within the first measuring range can be understood as the monotonically increasing or monotonically decreasing first curve within the first measuring range.

[0104] The optical signal processing method provided in an embodiment of the present invention obtains a first branch signal and a second branch signal of the optical signal to be measured; determines a first optical power of the first branch signal and a second optical power of the second branch signal after passing through a filter; determines the center wavelength of the optical signal to be measured based on the correspondence between the first optical power, the second optical power and the filtering parameters of the filter and the wavelength; wherein the filtering parameters include reflectivity or transmittance; the filtering curve of the filter includes a first curve, the first curve continuously increases or continuously decreases within a first range, and the spectral range of the optical signal to be measured is smaller than the first range; it is possible to separate a reference optical path (corresponding to the first branch signal) and a detection optical path (corresponding to the second branch signal), thereby completing the detection of the optical signal; the implementation of this solution does not require coupling too many optical elements, the device cost is low, the operation and maintenance are simple, and it can adapt to harsh working environments; and this solution does not require additional reference light sources, flat filters, etc., so that the measurement accuracy will not be affected by the characteristics of the reference light source and the flat filter, thereby ensuring the measurement accuracy as much as possible; it well solves the problem of complex operation and maintenance of optical signal processing solutions for optical signal detection in the prior art.

[0105] Furthermore, before determining the center wavelength of the optical signal to be measured based on the first optical power, the second optical power, and the correspondence between the filtering parameters of the filter and the wavelength, it also includes: obtaining the first optical power ratio between the unfiltered second branch signal and the first branch signal; determining the center wavelength of the optical signal to be measured based on the first optical power, the second optical power, and the correspondence between the filtering parameters of the filter and the wavelength includes: determining the center wavelength of the optical signal to be measured based on the first optical power ratio, the first optical power, the second optical power, and the correspondence between the filtering parameters of the filter and the wavelength.

[0106] This ensures that an adapted corresponding relationship is used to accurately determine the central wavelength of the optical signal to be measured.

[0107] Wherein, determining the center wavelength of the optical signal to be measured based on the first optical power ratio, the first optical power, the second optical power and the correspondence between the filtering parameters of the filter and the wavelength includes: obtaining a second optical power ratio between the second optical power and the first optical power; obtaining a first ratio between the second optical power ratio and the first optical power ratio; obtaining filtering parameters from the filtering parameters of the filter that match the first ratio; and obtaining the center wavelength of the optical signal to be measured based on the obtained filtering parameters and the correspondence between the filtering parameters of the filter and the wavelength.

[0108] Specifically, the wavelength corresponding to the filter parameter that matches the obtained filter parameter in the corresponding relationship is used as the central wavelength of the optical signal to be measured.

[0109] In an embodiment of the present invention, the optical signal processing method further includes: obtaining at least one third branch signal of the optical signal to be measured; sending the at least one third branch signal to a transmission device; wherein the third branch signal is a branch signal other than the first branch signal and the second branch signal.

[0110] This can expand the application scenarios of this solution.

[0111] In the embodiment of the present invention, obtaining the first branch signal and the second branch signal of the optical signal to be measured includes: obtaining the first branch signal and the second branch signal of the optical signal to be measured through an optical splitter or an optical switch.

[0112] In this way, the first branch signal and the second branch signal can be obtained flexibly.

[0113] In an embodiment of the present invention, determining the first optical power of the first branch signal and the second optical power of the second branch signal after passing through the filter includes: determining the first optical power of the first branch signal through a first optical power detector, and determining the second optical power of the second branch signal after passing through the filter through a second optical power detector (the two branch signals correspond to one optical power detector respectively); or, determining the first optical power of the first branch signal and the second optical power of the second branch signal after passing through the filter through a third optical power detector (the two branch signals share one optical power detector); wherein the third optical power detector is connected to an optical combiner or an optical switch, and the first branch signal and the second branch signal respectively pass through the optical combiner or the optical switch to enter the third optical power detector.

[0114] In this way, the first optical power and the second optical power can be quickly obtained; or, the device cost can be minimized while ensuring that the first optical power and the second optical power are obtained.

[0115] Regarding “the third optical power detector is connected to a light combiner or an optical switch”, the third optical power detector is connected to a light combining component, which is a light combiner or an optical switch.

[0116] The optical signal processing method provided by the embodiment of the present invention is further described below, with a shelving filter being taken as an example.

[0117] In response to the above technical problems, an embodiment of the present invention provides an optical signal processing method, which can be specifically implemented as an optical signal wavelength monitoring method based on a ramp filter: this solution separates the reference optical path and the detection optical path through a splitter or an optical switch. Except for the optical power detector used, all other passive devices do not require movement and can adapt to harsh working environments. The device cost is low, and the accuracy fluctuation is only determined by the characteristic fluctuation of the passive device.

[0118] Specifically, the solution provided by the embodiment of the present invention can be adopted as follows Figures 2 to 6 The architecture shown in any one of the above is implemented, and the architecture includes: a light splitting component, a slope filter, an optical power detector and a comparison and analysis module; it may also include: a light combining component; wherein the light splitting component is a light splitter or an optical switch, and the light combining component is a light combiner or an optical switch.

[0119] After the measured light (corresponding to the aforementioned optical signal to be measured) enters the incident port A, it is split into two or more light paths (including the aforementioned first branch signal and the second branch signal) through an optical splitter or optical switch. The second branch light path (corresponding to the aforementioned second branch signal) and the first branch light path (corresponding to the aforementioned first branch signal) satisfy a fixed optical power ratio a. In this embodiment of the present invention, if the light divided into the measured light path is greater than the two branch light paths, the other branch light path (corresponding to the aforementioned third branch signal) can be directly output from the system (corresponding to the aforementioned sending to the transmission device). The other branch light path can also be referred to as the third branch light path.

[0120] Subsequently, the first split beam can directly enter the optical power detector (corresponding to Figure 2 and Figure 3 architecture); or, advanced optical switches (corresponding to Figure 4 and Figure 5 Architecture) or optical combiner (corresponding to Figure 6 The architecture) is then input to the optical power detector;

[0121] After the second path of light splitting enters the slope filter, it can directly enter the optical power detector (corresponding to Figure 2 and Figure 3 architecture), or, advanced optical switches (corresponding to Figure 4 and Figure 5 Architecture) or optical combiner (corresponding to Figure 6 The architecture) is then input into the optical power detector;

[0122] The measurement results of the optical power detector are input into the comparison and analysis module to obtain the ratio b between the second path of split light and the first path of split light after the slope filter; according to the result of b / a and the known correspondence between the transmittance or reflectance of the slope filter and the wavelength (light wavelength) (such as Figure 7 Specifically, the central wavelength of the measured light can be obtained according to b / a and the slope filter corresponding to the curve oblique edge (such as Figure 7 The central wavelength of the measured light can be determined by matching the ratios b / a with the ratios corresponding to the hypotenuse of the curve.

[0123] In an embodiment of the present invention, the filtering curve of the ramp filter needs to be monotonically increasing or monotonically decreasing within the measured range (corresponding to the above-mentioned first range), and the spectral range of the measured light is smaller than the measured range, which can also be called the channel bandwidth.

[0124] The optical power detector in the embodiment of the present invention can obtain the power of the optical signal passing through the optical power detector;

[0125] for Figure 2 In the architecture shown in the figure, there can also be two splitters, including splitter 1 and splitter 2; wherein, splitter 1 splits the third split and the combined split of the first split and the second split; splitter 2 splits the combined split of the first split and the second split into the first split and the second split; this is not limited here.

[0126] In the embodiment of the present invention, regarding the slope filter: the transmission or reflection characteristics of this filter for light within a certain wavelength range have a certain relationship with the wavelength, for example, the transmittance or reflectance increases or decreases as the wavelength of the light increases.

[0127] In the embodiment of the present invention, the optical power ratio between the first split path and the second split path (ie, the optical signal ratio) has a corresponding relationship with the optical wavelength, such as Figure 8 As shown, C represents the minimum wavelength and D represents the maximum wavelength;

[0128] The filtering principle of the shelving filter in the embodiment of the present invention can be as follows: Figure 9 As shown, B represents the channel bandwidth, C represents the minimum wavelength, D represents the maximum wavelength, and E represents the spectral effect of the ramp filter.

[0129] From the above, it can be seen that the solution provided by the embodiment of the present invention mainly includes: distinguishing the reference optical path and the detection optical path passing through the slope filter; comparing and analyzing the power ratio b of the two paths, combining the splitting ratio a, the reflectivity or transmittance of the filter and the wavelength relationship to obtain the center wavelength of the measured light.

[0130] In addition, this solution does not require additional reference light sources or flattening filters, and the measurement accuracy will not be affected by the characteristics of the reference light source and the flattening filter. Except for the optical power detector, all other components are low-cost passive components with simple operation and maintenance and can adapt to harsh working environments.

[0131] The embodiment of the present invention further provides an optical signal processing device, such as Figure 10 As shown, including:

[0132] A first acquisition module 101 is configured to acquire a first branch signal and a second branch signal of the optical signal to be measured;

[0133] A first determining module 102 is configured to determine a first optical power of the first branch signal and a second optical power of the second branch signal after passing through a filter;

[0134] A second determining module 103 is configured to determine the center wavelength of the optical signal to be measured according to the first optical power, the second optical power, and the corresponding relationship between the filtering parameters of the filter and the wavelength;

[0135] Wherein, the filtering parameter includes reflectivity or transmittance;

[0136] The filtering curve of the filter includes a first curve, the first curve continuously increases or continuously decreases within a first measurement range, and the spectral range of the optical signal to be measured is smaller than the first measurement range.

[0137] The optical signal processing device provided in an embodiment of the present invention obtains a first branch signal and a second branch signal of the optical signal to be measured; determines a first optical power of the first branch signal and a second optical power of the second branch signal after passing through a filter; determines the center wavelength of the optical signal to be measured based on the correspondence between the first optical power, the second optical power and the filtering parameters of the filter and the wavelength; wherein the filtering parameters include reflectivity or transmittance; the filtering curve of the filter includes a first curve, the first curve continuously increases or continuously decreases within a first range, and the spectral range of the optical signal to be measured is smaller than the first range; it is capable of separating a reference optical path (corresponding to the first branch signal) and a detection optical path (corresponding to the second branch signal), thereby completing the detection of the optical signal; the implementation of this solution does not require coupling too many optical elements, the device cost is low, the operation and maintenance are simple, and it can adapt to harsh working environments; and this solution does not require additional reference light sources, flat filters, etc., so that the measurement accuracy will not be affected by the characteristics of the reference light source and the flat filter, thereby ensuring the measurement accuracy as much as possible; it well solves the problem of complex operation and maintenance of optical signal processing solutions for optical signal detection in the prior art.

[0138] Furthermore, the optical signal processing device also includes: a second acquisition module, which is used to obtain a first optical power ratio between the unfiltered second branch signal and the first branch signal before determining the center wavelength of the optical signal to be measured based on the first optical power, the second optical power and the correspondence between the filtering parameters of the filter and the wavelength; determining the center wavelength of the optical signal to be measured based on the first optical power, the second optical power and the correspondence between the filtering parameters of the filter and the wavelength includes: determining the center wavelength of the optical signal to be measured based on the first optical power ratio, the first optical power, the second optical power and the correspondence between the filtering parameters of the filter and the wavelength.

[0139] In an embodiment of the present invention, determining the center wavelength of the optical signal to be measured based on the first optical power ratio, the first optical power, the second optical power, and the correspondence between the filtering parameters of the filter and the wavelength includes: obtaining a second optical power ratio between the second optical power and the first optical power; obtaining a first ratio between the second optical power ratio and the first optical power ratio; obtaining filtering parameters from the filtering parameters of the filter that match the first ratio; and obtaining the center wavelength of the optical signal to be measured based on the obtained filtering parameters and the correspondence between the filtering parameters of the filter and the wavelength.

[0140] Furthermore, the optical signal processing device also includes: a third acquisition module, used to obtain at least one third branch signal of the optical signal to be measured; a first sending module, used to send the at least one third branch signal to the transmission equipment; wherein, the third branch signal is other branch signals except the first branch signal and the second branch signal.

[0141] In the embodiment of the present invention, obtaining the first branch signal and the second branch signal of the optical signal to be measured includes: obtaining the first branch signal and the second branch signal of the optical signal to be measured through an optical splitter or an optical switch.

[0142] In an embodiment of the present invention, determining the first optical power of the first branch signal and the second optical power of the second branch signal after passing through the filter includes: determining the first optical power of the first branch signal through a first optical power detector, and determining the second optical power of the second branch signal after passing through the filter through a second optical power detector; or, determining the first optical power of the first branch signal and the second optical power of the second branch signal after passing through the filter through a third optical power detector; wherein the third optical power detector is connected to an optical combiner or an optical switch, and the first branch signal and the second branch signal respectively pass through the optical combiner or the optical switch to enter the third optical power detector.

[0143] Among them, the implementation embodiments of the above-mentioned optical signal processing method are all applicable to the embodiments of the optical signal processing device and can also achieve the same technical effects.

[0144] The embodiment of the present invention further provides an optical signal processing device, such as Figure 11 As shown, it includes: a processor 111 and a transceiver 112;

[0145] The processor 111 is configured to obtain a first branch signal and a second branch signal of the optical signal to be measured;

[0146] Determining a first optical power of the first branch signal and a second optical power of the second branch signal after passing through a filter;

[0147] determining a central wavelength of the optical signal to be measured according to the first optical power, the second optical power, and a correspondence between the filtering parameters of the filter and the wavelength;

[0148] Wherein, the filtering parameter includes reflectivity or transmittance;

[0149] The filtering curve of the filter includes a first curve, the first curve continuously increases or continuously decreases within a first measurement range, and the spectral range of the optical signal to be measured is smaller than the first measurement range.

[0150] The optical signal processing device provided in an embodiment of the present invention obtains a first branch signal and a second branch signal of the optical signal to be measured; determines a first optical power of the first branch signal and a second optical power of the second branch signal after passing through a filter; determines the center wavelength of the optical signal to be measured based on the correspondence between the first optical power, the second optical power and the filtering parameters of the filter and the wavelength; wherein the filtering parameters include reflectivity or transmittance; the filtering curve of the filter includes a first curve, the first curve continuously increases or continuously decreases within a first range, and the spectral range of the optical signal to be measured is smaller than the first range; it is capable of separating a reference optical path (corresponding to the first branch signal) and a detection optical path (corresponding to the second branch signal), thereby completing the detection of the optical signal; the implementation of this solution does not require coupling too many optical elements, the device cost is low, the operation and maintenance are simple, and it can adapt to harsh working environments; and this solution does not require additional reference light sources, flat filters, etc., so that the measurement accuracy will not be affected by the characteristics of the reference light source and the flat filter, thereby ensuring the measurement accuracy as much as possible; it well solves the problem of complex operation and maintenance of optical signal processing solutions for optical signal detection in the prior art.

[0151] Furthermore, the processor is also used to: before determining the center wavelength of the optical signal to be measured based on the first optical power, the second optical power and the correspondence between the filtering parameters of the filter and the wavelength, obtain the first optical power ratio between the unfiltered second branch signal and the first branch signal; determining the center wavelength of the optical signal to be measured based on the first optical power, the second optical power and the correspondence between the filtering parameters of the filter and the wavelength includes: determining the center wavelength of the optical signal to be measured based on the first optical power ratio, the first optical power, the second optical power and the correspondence between the filtering parameters of the filter and the wavelength.

[0152] In an embodiment of the present invention, determining the center wavelength of the optical signal to be measured based on the first optical power ratio, the first optical power, the second optical power, and the correspondence between the filtering parameters of the filter and the wavelength includes: obtaining a second optical power ratio between the second optical power and the first optical power; obtaining a first ratio between the second optical power ratio and the first optical power ratio; obtaining filtering parameters from the filtering parameters of the filter that match the first ratio; and obtaining the center wavelength of the optical signal to be measured based on the obtained filtering parameters and the correspondence between the filtering parameters of the filter and the wavelength.

[0153] Furthermore, the processor is also used to: obtain at least one third branch signal of the optical signal to be measured; send the at least one third branch signal to the transmission equipment through the transceiver; wherein the third branch signal is other branch signals except the first branch signal and the second branch signal.

[0154] In the embodiment of the present invention, obtaining the first branch signal and the second branch signal of the optical signal to be measured includes: obtaining the first branch signal and the second branch signal of the optical signal to be measured through an optical splitter or an optical switch.

[0155] In an embodiment of the present invention, determining the first optical power of the first branch signal and the second optical power of the second branch signal after passing through the filter includes: determining the first optical power of the first branch signal through a first optical power detector, and determining the second optical power of the second branch signal after passing through the filter through a second optical power detector; or, determining the first optical power of the first branch signal and the second optical power of the second branch signal after passing through the filter through a third optical power detector; wherein the third optical power detector is connected to an optical combiner or an optical switch, and the first branch signal and the second branch signal respectively pass through the optical combiner or the optical switch to enter the third optical power detector.

[0156] Among them, the implementation embodiments of the above-mentioned optical signal processing method are all applicable to the embodiments of the optical signal processing device and can also achieve the same technical effects.

[0157] An embodiment of the present invention further provides an optical signal processing device, comprising a memory, a processor, and a program stored in the memory and executable on the processor; when the processor executes the program, the above-mentioned optical signal processing method is implemented.

[0158] Among them, the implementation embodiments of the above-mentioned optical signal processing method are all applicable to the embodiments of the optical signal processing device and can also achieve the same technical effects.

[0159] An embodiment of the present invention further provides a readable storage medium storing a program, which implements the steps of the above-mentioned optical signal processing method when executed by a processor.

[0160] Among them, the implementation embodiments of the above-mentioned optical signal processing method are all applicable to the embodiments of the readable storage medium and can also achieve the same technical effects.

[0161] It should be noted that many functional components described in this specification are referred to as modules in order to more particularly emphasize the independence of their implementation methods.

[0162] In embodiments of the present invention, modules can be implemented in software so that they can be executed by various types of processors. For example, an identified executable code module can include one or more physical or logical blocks of computer instructions, for example, which can be constructed as objects, procedures, or functions. Nevertheless, the executable code of the identified module does not need to be physically located together, but can include different instructions stored in different locations, which, when logically combined together, constitute the module and achieve the specified purpose of the module.

[0163] In fact, executable code module can be a single instruction or many instructions, and can even be distributed on a plurality of different code segments, distributed in the middle of different programs, and distributed across a plurality of memory devices.Similarly, operating data can be identified in the module, and can be implemented and organized in the data structure of any appropriate type according to any appropriate form.Described operating data can be collected as a single data set, or can be distributed in different locations (including on different storage devices), and can only be present on a system or network as an electronic signal at least in part.

[0164] When a module can be implemented using software, given the current state of hardware technology, those skilled in the art can build corresponding hardware circuits to implement the corresponding functions of the module, regardless of cost. The hardware circuits may include conventional very large scale integration (VLSI) circuits or gate arrays, as well as existing semiconductors such as logic chips and transistors, or other discrete components. Modules may also be implemented using programmable hardware devices, such as field programmable gate arrays, programmable array logic, or programmable logic devices.

[0165] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary personnel in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for processing an optical signal, characterized in that: include: Acquire a first branch signal and a second branch signal of the optical signal to be measured; Determining a first optical power of the first branch signal and a second optical power of the second branch signal after passing through a filter; determining a central wavelength of the optical signal to be measured according to the first optical power, the second optical power, and a correspondence between the filtering parameters of the filter and the wavelength; Wherein, the filtering parameter includes reflectivity or transmittance; The filtering curve of the filter includes a first curve, the first curve continuously increases or continuously decreases within a first measurement range, and the spectral range of the optical signal to be measured is smaller than the first measurement range; Before determining the center wavelength of the optical signal to be measured according to the first optical power, the second optical power, and the corresponding relationship between the filtering parameters of the filter and the wavelength, the method further includes: Acquire a first optical power ratio between the unfiltered second branch signal and the first branch signal; The determining the center wavelength of the optical signal to be measured according to the first optical power, the second optical power, and the corresponding relationship between the filtering parameter of the filter and the wavelength includes: The center wavelength of the optical signal to be measured is determined according to the first optical power ratio, the first optical power, the second optical power, and a correspondence between the filtering parameters of the filter and the wavelength.

2. The optical signal processing method according to claim 1, wherein: The determining the center wavelength of the optical signal to be measured according to the first optical power ratio, the first optical power, the second optical power, and the corresponding relationship between the filtering parameters of the filter and the wavelength includes: Obtaining a second optical power ratio between the second optical power and the first optical power; Obtaining a first ratio between a second optical power ratio and the first optical power ratio; Acquire filtering parameters of the filter that match the first ratio; The center wavelength of the optical signal to be measured is obtained according to the acquired filtering parameters and the corresponding relationship between the filtering parameters of the filter and the wavelength.

3. The optical signal processing method according to claim 1, wherein: Also includes: Acquiring at least one third branch signal of the optical signal to be measured; Sending the at least one third branch signal to a transmission device; The third branch signal is another branch signal except the first branch signal and the second branch signal.

4. The optical signal processing method according to claim 1, wherein: The step of obtaining the first branch signal and the second branch signal of the optical signal to be measured includes: A first branch signal and a second branch signal of the optical signal to be measured are obtained through an optical splitter or an optical switch.

5. The optical signal processing method according to claim 1, wherein: The determining of the first optical power of the first branch signal and the second optical power of the second branch signal after passing through the filter includes: Determine the first optical power of the first branch signal by a first optical power detector, and determine the second optical power of the second branch signal after passing through the filter by a second optical power detector; or, The first optical power of the first branch signal and the second optical power of the second branch signal after passing through the filter are determined by a third optical power detector; wherein the third optical power detector is connected to a light combiner or an optical switch, and the first branch signal and the second branch signal respectively pass through the light combiner or the optical switch into the third optical power detector.

6. An optical signal processing device, characterized in that: include: A first acquisition module, configured to acquire a first branch signal and a second branch signal of the optical signal to be measured; A first determining module is configured to determine a first optical power of the first branch signal and a second optical power of the second branch signal after passing through a filter; a second determining module, configured to determine the center wavelength of the optical signal to be measured according to the first optical power, the second optical power, and a correspondence between the filtering parameters of the filter and the wavelength; Wherein, the filtering parameter includes reflectivity or transmittance; The filtering curve of the filter includes a first curve, the first curve continuously increases or continuously decreases within a first measurement range, and the spectral range of the optical signal to be measured is smaller than the first measurement range; Wherein, the optical signal processing device further includes: a second acquisition module, configured to acquire a first optical power ratio between the unfiltered second branch signal and the first branch signal before determining the center wavelength of the optical signal to be measured based on the first optical power, the second optical power, and the correspondence between the filtering parameter of the filter and the wavelength; The determining the center wavelength of the optical signal to be measured according to the first optical power, the second optical power, and the corresponding relationship between the filtering parameter of the filter and the wavelength includes: The center wavelength of the optical signal to be measured is determined according to the first optical power ratio, the first optical power, the second optical power, and a correspondence between the filtering parameters of the filter and the wavelength.

7. The optical signal processing device according to claim 6, wherein: The determining the center wavelength of the optical signal to be measured according to the first optical power ratio, the first optical power, the second optical power, and the corresponding relationship between the filtering parameters of the filter and the wavelength includes: Obtaining a second optical power ratio between the second optical power and the first optical power; Obtaining a first ratio between a second optical power ratio and the first optical power ratio; Acquire filtering parameters of the filter that match the first ratio; The center wavelength of the optical signal to be measured is obtained according to the acquired filtering parameters and the corresponding relationship between the filtering parameters of the filter and the wavelength.

8. The optical signal processing device according to claim 6, wherein: Also includes: A third acquisition module, configured to acquire at least one third branch signal of the optical signal to be measured; A first sending module, configured to send the at least one third branch signal to a transmission device; The third branch signal is another branch signal except the first branch signal and the second branch signal.

9. The optical signal processing device according to claim 6, wherein: The step of obtaining the first branch signal and the second branch signal of the optical signal to be measured includes: A first branch signal and a second branch signal of the optical signal to be measured are obtained through an optical splitter or an optical switch.

10. The optical signal processing device according to claim 6, wherein: The determining of the first optical power of the first branch signal and the second optical power of the second branch signal after passing through the filter includes: Determine the first optical power of the first branch signal by a first optical power detector, and determine the second optical power of the second branch signal after passing through the filter by a second optical power detector; or, The first optical power of the first branch signal and the second optical power of the second branch signal after passing through the filter are determined by a third optical power detector; wherein the third optical power detector is connected to a light combiner or an optical switch, and the first branch signal and the second branch signal respectively pass through the light combiner or the optical switch into the third optical power detector.

11. An optical signal processing device, characterized in that: include: processor and transceiver; The processor is configured to obtain a first branch signal and a second branch signal of the optical signal to be measured; Determining a first optical power of the first branch signal and a second optical power of the second branch signal after passing through a filter; determining a central wavelength of the optical signal to be measured according to the first optical power, the second optical power, and a correspondence between the filtering parameters of the filter and the wavelength; Wherein, the filtering parameter includes reflectivity or transmittance; The filtering curve of the filter includes a first curve, the first curve continuously increases or continuously decreases within a first measurement range, and the spectral range of the optical signal to be measured is smaller than the first measurement range; The processor is further configured to: Before determining the center wavelength of the optical signal to be measured based on the first optical power, the second optical power, and the correspondence between the filtering parameter of the filter and the wavelength, obtaining a first optical power ratio between the unfiltered second branch signal and the first branch signal; The determining the center wavelength of the optical signal to be measured according to the first optical power, the second optical power, and the corresponding relationship between the filtering parameter of the filter and the wavelength includes: The center wavelength of the optical signal to be measured is determined according to the first optical power ratio, the first optical power, the second optical power, and a correspondence between the filtering parameters of the filter and the wavelength.

12. An optical signal processing device comprising a memory, a processor, and a program stored in the memory and executable on the processor; characterized in that: When the processor executes the program, the optical signal processing method according to any one of claims 1 to 5 is implemented.

13. A readable storage medium having a program stored thereon, characterized in that: When the program is executed by a processor, the steps of the optical signal processing method according to any one of claims 1 to 5 are implemented.

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