CN115694631A

CN115694631A - Power measurement method, device and related equipment

Info

Publication number: CN115694631A
Application number: CN202110877281.9A
Authority: CN
Inventors: 刘帆; 李明
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-07-31
Filing date: 2021-07-31
Publication date: 2023-02-03

Abstract

The application provides a power measurement method which is applied to the field of optical communication. The power measurement method comprises the following steps: the power measurement device acquires a first power spectrum of the first optical signal over N wavelengths. N is an integer greater than 1. The power measurement device acquires X powers. The X powers correspond to the X sub-optical signals one-to-one. Each sub-optical signal is one or more wavelength signals in the first optical signal. Each sub-optical signal includes a different wavelength, and X is an integer greater than 0 and less than N. And the power measurement equipment corrects the first power spectrum according to the X powers to obtain a target power spectrum. In this application, the first power spectrum is an inaccurate power spectrum. The inaccurate power spectrum is corrected through X powers, so that the frequency of measuring quantum optical signals can be reduced, and the measurement efficiency is improved.

Description

Power measurement method, device and related equipment

Technical Field

The present application relates to the field of optical communications, and in particular, to a power measurement method, apparatus, and related device.

Background

Wavelength Division Multiplexing (WDM) technology can transmit optical signals of different wavelengths in one optical fiber, thereby increasing communication bandwidth.

However, in the optical transmission path, the power variation of the sub optical signals of different wavelengths may be different. If the power difference of the sub optical signals with different wavelengths is too large, the transmission performance of the optical signals is affected. Therefore, one or more power detection devices may be provided in the optical transmission path. The power detection device is used for measuring the power of the optical signal to be detected on different wavelengths. Specifically, the power detection device includes a grating, a Micro Electro Mechanical System (MEMS) turning mirror, and a Photodiode (PD). The grating is used for dividing an optical signal to be detected comprising N wavelengths into N sub-optical signals. The N sub-optical signals correspond to the N wavelengths one by one. And transmitting the N sub optical signals to the MEMS rotating mirror. By changing the angle of the MEMS rotating mirror, the power detection equipment can transmit different sub optical signals to the PD to obtain the power spectrum of the optical signal to be detected on N wavelengths.

In practical applications, for a light beam to be detected including N wavelengths, the power detection device needs to measure the power of N sub-optical signals. If the value of N is too large, the measurement efficiency of the power detection device is low.

Disclosure of Invention

The application provides a power measurement method, a power measurement device and related equipment, wherein inaccurate power spectrums are corrected through X power, the times of measuring quantum optical signals can be reduced, and the measurement efficiency is improved.

A first aspect of the present application provides a method of power measurement. The power measurement method may be applied to a power measurement device. The power measurement method comprises the following steps: the power measurement device acquires a first power spectrum of the first optical signal over N wavelengths. N is an integer greater than 1. The power measurement device may obtain the first power spectrum from the last power measurement device or transmitting end in the optical beam transmission path. In the above two examples, there are optical devices, such as optical fibers, optical amplifiers, etc., between the power measuring device and the last power measuring device, the transmitting end. After passing through the optical device, the power spectrum of the first optical signal may change. Thus, the first power spectrum is an inaccurate power spectrum for the power measurement device. The first optical signal includes M wavelengths. M is an integer greater than or equal to N. The power measurement device acquires X powers. The X powers correspond to the X sub-optical signals one-to-one. Each sub-optical signal is one or more wavelength signals in the first optical signal. Each sub-optical signal includes a different wavelength. X is an integer greater than 0 and less than N. And the power measurement equipment corrects the first power spectrum according to the X powers to obtain a target power spectrum of the first optical signal on the N wavelengths.

In the present application, X is less than N. For example, when N equals 120, X may equal 2 or 3. The value of X is the frequency of measuring the quantum optical signal by the power measuring equipment. Therefore, the inaccurate power spectrum is corrected through the X powers, so that the frequency of measuring the quantum optical signals can be reduced, and the measuring efficiency is improved.

In an optional manner of the first aspect, the power measurement device receives X sub optical signals from a measurement port of a Wavelength Selective Switch (WSS). The power measurement device measures X powers of the X sub-optical signals. The WSS includes an output port and a measurement port. The WSS is configured to output a first optical signal through an output port. The transmitting end transmits a first optical signal to the receiving end through an optical transmission path. WSS belongs to an optical device in an optical transmission path. The WSS is used to implement wavelength selection of the first optical signal. The WSS is also used to derive X sub-optical signals. Therefore, the cost of the power measuring equipment can be reduced. And, the power measurement device can flexibly adjust the value of X, and/or the number of wavelengths of each sub-optical signal through the WSS. Therefore, the present application may increase the flexibility of power measurement.

In an alternative form of the first aspect, the power measurement device receives X sub-optical signals from X first optical splitters. And the X sub-optical signals correspond to the X first optical splitters one to one. The power measurement device obtains X powers of X sub-optical signals. The X first optical splitters are used for receiving X optical signals from the first optical splitter. The X first optical splitters are used for splitting the X optical signals into X sub-optical signals and X output optical signals. The X first optical splitters are used for outputting X output optical signals. The first splitter is configured to split the first optical signal into N optical signals. The N optical signals include X optical signals and N-X optical signals. The N optical signals correspond to the N wavelengths one to one. The first wave splitter is used for outputting N-X optical signals. Wherein the first splitter belongs to an optical device in the optical transmission path. The first wave splitter is used for realizing wave splitting of the first optical signal. The first splitter is also used to obtain X sub-optical signals. Therefore, the cost of the power measuring equipment can be reduced.

In an alternative form of the first aspect, the power measurement device receives the measurement optical signal from the second optical splitter. The power measuring device divides the measuring optical signal into X sub-optical signals by the second demultiplexer. The power measurement device obtains X powers of X sub-optical signals. The second optical splitter is used for splitting the first optical signal into a target optical signal and a measurement optical signal. The second optical splitter is used for outputting a target optical signal. The second optical splitter is connected behind the second optical splitter, so that the number of the optical splitters can be reduced, and the cost of measuring power is reduced.

In an alternative form of the first aspect, the X sub-optical signals comprise optical signals of N wavelengths. Wherein, the power measuring device can obtain the slope of the power distribution of the first optical signal according to the X powers. When the wavelength range covered by the X sub-optical signals is larger, the slope obtained by the power measuring equipment is more accurate. The power measurement device may correct the first power spectrum according to the slope to obtain a target power spectrum. Therefore, the present application may limit the X sub-optical signals to include optical signals of N wavelengths, thereby improving the accuracy of the target power spectrum.

In an alternative form of the first aspect, each of the X sub-optical signals is an optical signal having a plurality of consecutive wavelengths. When the wavelength of each sub-optical signal is continuous, the cost of the wavelength division device in the power measurement equipment can be reduced.

In an alternative form of the first aspect, the first optical signal is obtained by passing the second optical signal through an optical amplifier. The power measurement device acquires a second power spectrum of the second optical signal over the N wavelengths. In this application, the manner in which the power measurement device acquires the second power spectrum may refer to the manner in which the aforementioned power measurement device acquires the first power spectrum. The power measurement device acquires gain distributions of the optical amplifier over N wavelengths. And the power measurement equipment adds the power and the gain with the same wavelength in the second power spectrum and the gain distribution to obtain a first power spectrum. Wherein, as can be seen from the foregoing description, the first power spectrum is an inaccurate power spectrum. According to the method and the device, the accuracy of the first power spectrum can be improved by introducing the gain spectrum of the optical amplifier, and the accuracy of the target power spectrum is further improved.

In an optional manner of the first aspect, the first optical signal is obtained by passing N second optical signals through a third multiplexer. The power measurement device obtains the total power of the N second optical signals over the N wavelengths. The power measurement device acquires second power spectra of the N second optical signals at the N wavelengths. The power measurement device adjusts the second power spectrum using the total power to obtain a first power spectrum of the first optical signal over the N wavelengths. In the application, the accuracy of the first power spectrum can be improved by adjusting the second power spectrum through the total power, and the accuracy of the target power spectrum is further improved.

In an alternative form of the first aspect, the first optical signal is derived from the second optical signal via an optical fiber. The power measurement device acquires a second power spectrum of the second optical signal over N wavelengths. The power measurement device obtains a first power spectrum from a Stimulated Raman Scattering (SRS) effect of the second optical signal in the optical fiber and the second power spectrum. In the application, the accuracy of the first power spectrum can be improved by adjusting the second power spectrum through the SRS effect, and the accuracy of the target power spectrum is further improved.

In an alternative form of the first aspect, M is an integer greater than N. The first optical signal includes a traffic optical signal and a dummy optical signal. The dummy optical signal includes N wavelengths. The traffic optical signal includes M-N wavelengths. The traffic optical signal carries a set-top signal. The power measurement method further includes: and the power measurement equipment acquires the service power spectrum of the service optical signal on M-N wavelengths according to the pilot tone signal. The dummy optical signal may not need to be modulated, and the service optical signal may need to be modulated. Therefore, if the sending end needs to add the tone-top signal to the service optical signal, the sending end may add the tone-top signal in the process of modulating the service optical signal. If the sending end needs to add the top-modulated signal into the false optical signal, the sending end needs to add an additional modulator, thereby increasing the cost of the sending end. However, the accuracy of the power spectrum measured by the pilot tone signal is higher. In the present application, the power measurement device obtains the service power spectrum and the target power spectrum according to different manners. Therefore, the cost for acquiring the target power spectrum can be reduced on the basis of improving the accuracy of the service power spectrum.

In an optional manner of the first aspect, the power measurement method further includes: and the power measurement equipment corrects the target power spectrum by using the service power spectrum to obtain a corrected target power spectrum. Since the service optical signal and the dummy optical signal are transmitted in the same optical fiber, there is a certain correlation between the service power spectrum and the target power spectrum. And, the accuracy of the traffic power spectrum is generally higher than the accuracy of the target power spectrum. Therefore, the power measurement equipment can correct the target power spectrum through the service power spectrum, so that the accuracy of the target power spectrum is improved.

In an alternative form of the first aspect, each sub optical signal is a partial wavelength optical signal in the traffic optical signal. Wherein the traffic power spectrum obtained by the pilot tone signal includes X powers of the X sub-optical signals. The power measurement device obtains X powers in the traffic power spectrum. Therefore, the cost of the power measuring equipment can be reduced. For example, the power measurement device measures the power of the service optical signal in the first optical signal through one PD to obtain a service power spectrum, that is, X powers are obtained. Therefore, the power measurement device may not include the aforementioned third wave splitter.

In an alternative form of the first aspect, the power of the N wavelength signals is the same in the first power spectrum. The X powers include a first power of the first sub optical signal and a second power of the second sub optical signal. The power measurement method further includes: power measuring equipment according to

And obtaining a first slope t, wherein g1 is a first power. And g2 is the second power. f1 is the center wavelength of the first sub-optical signal. f2 is the center wavelength of the second sub-optical signal. The slope of the target power spectrum is a first slope. The power measurement device can correct the slope of the first power spectrum into the first slope, so that the measurement accuracy is improved.

In an alternative form of the first aspect, the X powers comprise a first power of the first sub optical signal and a second sub optical signalOf the second power. The power measurement device obtains the first slope t according to the following formula.

g1 is the first power, and g2 is the second power. f1 is the center wavelength of the first sub-optical signal. f2 is the center wavelength of the second sub-optical signal. The power measurement device obtains a target power spectrum according to the following formula:

P(λ _i ) Representing the power of the signal at the ith wavelength in the target power spectrum. i is an integer greater than 0 and less than N. Pa (lambda) _i ) Representing the power of the signal at the ith wavelength in the first power spectrum. F represents the size of the wavelength interval of the N wavelength signals. The power measurement equipment can correct the first power spectrum through the formula, so that the measurement accuracy is improved.

A second aspect of the present application provides a power measurement device. The power measuring device comprises a first obtaining module, a second obtaining module and a correcting module. The first acquisition module is used for acquiring a first power spectrum of the first optical signal on N wavelengths. N is an integer greater than 1. The first optical signal includes M wavelengths. M is an integer greater than or equal to N. The second acquisition module is used for acquiring X powers. The X powers correspond to the X sub-optical signals one-to-one. Each sub-optical signal is one or more wavelength signals in the first optical signal. Each sub-optical signal includes a different wavelength. X is an integer greater than 0 and less than N. The correction module is used for correcting the first power spectrum according to the X powers to obtain a target power spectrum of the first optical signal on the N wavelengths.

In an optional manner of the second aspect, the second acquisition module is configured to receive X sub-optical signals from a measurement port of the WSS. The second acquisition module is used for measuring X powers of the X sub-optical signals. The WSS includes an output port and a measurement port. The WSS is for use with the first optical signal via the output port.

In an optional manner of the second aspect, the second obtaining module is configured to receive X sub optical signals from X first optical splitters. The second acquisition module is used for acquiring X powers of the X sub-optical signals. Wherein the X first optical splitters are used for receiving X optical signals from the first optical splitter. The X first optical splitters are used for splitting the X optical signals into X sub-optical signals and X output optical signals. The X first optical splitters are used for outputting X output optical signals. The first splitter is configured to split the first optical signal into N optical signals. The first wave splitter is used for outputting N-X optical signals. The N optical signals correspond to the N wavelengths one to one.

In an alternative form of the second aspect, the second acquisition module includes a second wave splitter. The second acquisition module is used for receiving the measurement optical signal from the second optical splitter. The second acquisition module is used for dividing the measuring optical signal into X sub-optical signals through the second wave splitter. The second acquisition module is used for acquiring X powers of the X sub-optical signals. The second optical splitter is used for splitting the first optical signal into a target optical signal and a measuring optical signal. The second optical splitter is used for outputting a target optical signal.

In an alternative form of the second aspect, the X sub-optical signals comprise optical signals of N wavelengths.

In an alternative form of the second aspect, each of the X sub-optical signals is an optical signal having a plurality of consecutive wavelengths.

In an alternative form of the second aspect, the first optical signal is obtained by passing the second optical signal through an optical amplifier. The first acquisition module is used for acquiring a second power spectrum of the second optical signal on the N wavelengths. The first acquisition module is used for acquiring the gain distribution of the optical amplifier on N wavelengths. The first obtaining module is used for adding the power and the gain with the same wavelength in the second power spectrum and the gain distribution to obtain a first power spectrum.

In an alternative manner of the second aspect, the first optical signal is obtained by passing the N second optical signals through a third multiplexer. The first obtaining module is configured to obtain total power of the N second optical signals over the N wavelengths. The first obtaining module is used for obtaining second power spectrums of the N second optical signals on the N wavelengths. The first obtaining module is used for adjusting the second power spectrum by using the total power to obtain a first power spectrum of the first optical signal on the N wavelengths.

In an alternative form of the second aspect, the first optical signal is obtained by passing the second optical signal through an optical fiber. The first acquisition module is used for acquiring a second power spectrum of the second optical signal on N wavelengths. The first obtaining module is used for obtaining a first power spectrum according to the SRS effect of the second optical signal in the optical fiber and the second power spectrum.

In an alternative form of the second aspect, M is an integer greater than N. The first optical signal includes a traffic optical signal and a dummy optical signal. The dummy optical signal includes N wavelengths. The traffic optical signal includes M-N wavelengths. The traffic optical signal carries a set-top signal. The second obtaining module is further configured to obtain a service power spectrum of the service optical signal on the M-N wavelengths according to the pilot tone signal.

In an optional manner of the second aspect, the modification module is further configured to modify the target power spectrum by using the service power spectrum, so as to obtain a modified target power spectrum.

In an alternative form of the second aspect, each of the sub optical signals is a partial wavelength optical signal in the traffic optical signal.

In an alternative form of the second aspect, the power of the N wavelength signals is the same in the first power spectrum. The X powers include a first power of the first sub optical signal and a second power of the second sub optical signal. The correction module is also used for correcting

A first slope t is obtained. g1 is the first power. g2 is the second power. f1 is the center wavelength of the first sub-optical signal. f2 is the center wavelength of the second sub-optical signal. The power measuring device corrects the first power spectrum according to the X powers, and the slope of the target power spectrum obtained after the first power spectrum is corrected is the first slope.

In an alternative form of the second aspect, the X powers include a first power of the first sub optical signal and a second power of the second sub optical signal. The correction module is further configured to obtain the first slope t according to the following formula.

g1 is the first power, g2 is the second power. f1 is the center wavelength of the first sub-optical signal. f2 is the center wavelength of the second sub-optical signal. The correction module is used for obtaining a target power spectrum according to the following formula:

P(λ _i ) Representing the power of the signal at the ith wavelength in the target power spectrum. i is an integer greater than 0 and less than N. Pa (lambda) _i ) Representing the power of the signal at the ith wavelength in the first power spectrum. F represents the size of the wavelength interval of the N wavelength signals.

A third aspect of the present application provides a power measurement device. The power measurement device includes a memory and a processor. The memory stores a first power spectrum of the first optical signal at N wavelengths. N is an integer greater than 1. The first optical signal includes M wavelengths. M is an integer greater than or equal to N. There are also X powers stored in the memory. The X powers correspond to the X sub-optical signals one-to-one. Each sub-optical signal is one or more wavelength signals in the first optical signal. Each sub-optical signal includes a different wavelength. X is an integer greater than 0 and less than N. The processor is used for correcting the first power spectrum according to the X powers to obtain a target power spectrum of the first optical signal on the N wavelengths.

In an optional manner of the third aspect, the power measurement device further comprises a first obtaining module and/or a second obtaining module. The first obtaining module is configured to perform a function of the first obtaining module in any one of the options of the second aspect or the second aspect. And/or the second obtaining module is configured to perform the function of the second obtaining module in any of the options of the second aspect or the second aspect.

In an optional form of the third aspect, the processor of the power measurement device is further configured to perform the functions of the modification module of the second aspect or any optional form of the second aspect.

A fourth aspect of the present application provides an optical communication system. The optical communication system comprises a sending end, light splitting equipment, power measuring equipment and a receiving end. The transmitting end is used for transmitting the first optical signal to the receiving end. The optical splitting device is used for receiving the first optical signal. The optical splitting device is used for obtaining a measuring optical signal and a target optical signal according to the first optical signal. The optical splitting device is used for transmitting the target optical signal to the receiving end. The power measurement device is used for acquiring a first power spectrum of the first optical signal on N wavelengths. N is an integer greater than 1. The first optical signal includes M wavelengths. M is an integer greater than or equal to N. The power measuring device is also used for acquiring X powers according to the measuring optical signal. The power measurement device is further configured to correct the first power spectrum according to the X powers, so as to obtain a target power spectrum of the first optical signal at the N wavelengths. Wherein, X powers correspond to X sub-optical signals one to one. Each sub-optical signal is one or more wavelength signals in the first optical signal. Each sub-optical signal includes a different wavelength. X is an integer greater than 0 and less than N.

Drawings

Fig. 1 is a first schematic configuration of an optical communication system provided in the present application;

FIG. 2 is a schematic flow chart of a power measurement method provided herein;

fig. 3 is a second schematic diagram of an optical communication system provided in the present application;

fig. 4 is a third schematic diagram of an optical communication system provided in the present application;

fig. 5 is a fourth schematic diagram of an optical communication system provided in the present application;

fig. 6 is a fifth structural schematic diagram of an optical communication system provided in the present application;

fig. 7 is a sixth schematic diagram of an optical communication system provided in the present application;

FIG. 8 is a schematic diagram of a target power spectrum provided herein;

FIG. 9 is a schematic illustration of a traffic power spectrum and a target power spectrum as provided herein;

FIG. 10 is a schematic diagram of a power measurement device provided herein;

fig. 11 is a schematic structural diagram of a power measurement device provided in the present application.

Detailed Description

The application provides a power measurement method, a power measurement device and related equipment, wherein inaccurate power spectrums are corrected through X power, the times of measuring quantum optical signals can be reduced, and the measurement efficiency is improved. It is to be understood that the use of "first," "second," "target," and the like, herein are for purposes of descriptive differentiation only and are not to be construed as indicating or implying relative importance, nor order. In addition, reference numerals and/or letters are repeated among the various figures of the present application for sake of brevity and clarity. Repetition does not indicate a strict, restrictive relationship between the various embodiments and/or configurations.

In the field of optical communication using Wavelength Division Multiplexing (WDM) technology, a transmitting end and a receiving end transmit optical signals of a plurality of wavelengths through an optical transmission path. One or more optical devices may be included in the optical transmission path. The optical device may be an optical fiber, an amplifier, an optical coupler or an optical splitter, etc. The power variations of the sub-optical signals of different wavelengths may be different when passing through the optical device in the optical transmission path. In order to obtain a power spectrum of an optical signal to be detected including N wavelengths, the power measurement device needs to measure N sub optical signals of the optical signal to be detected. Therefore, if the value of N is too large, the measurement efficiency of the power detection device is low.

To this end, a power measurement method is provided in the present application. The power measurement method in the present application can be applied to an optical communication system. Fig. 1 is a first schematic diagram of an optical communication system provided in the present application. As shown in fig. 1, the optical communication system includes a transmitting end 101, an optical splitter 102, a power measurement device 103, and a receiving end 105.

The sender 101 may comprise one or more sending devices. For example, the transmitting end 101 is configured to transmit an optical signal including M wavelengths to the receiving end 105 through an optical transmission path. The transmitting end 101 includes M transmitting devices. Each transmitting device is configured to transmit an optical signal at one wavelength to the receiving end 105. The optical transmission path includes a multiplexer. The combiner is used for combining the M optical signals to obtain optical signals with M wavelengths. The combiner is configured to transmit an optical signal including M wavelengths to the receiving end 105. Similarly, the receiving end 105 may include one or more receiving devices. The transmitting device and/or the receiving device may be a switch, a router, a base station, or the like.

The optical splitting device 102 belongs to one or more optical devices in the optical transmission path. The optical splitting device 102 is configured to receive a first optical signal including M wavelengths. The optical splitting device 102 is further configured to obtain a measurement optical signal and a target optical signal including M wavelengths according to the first optical signal. The optical splitter 102 is also used to transmit the target optical signal to the receiving end 105. The target optical signal and the first optical signal carry the same data. The measurement optical signal may be X sub-optical signals of different wavelengths. The power measurement device 103 is configured to obtain X powers of the X sub-optical signals from the measurement optical signal. The power measurement device 103 is configured to obtain target power spectrums of the first optical signal over N wavelengths according to the X powers. The power measurement device 103 may report the target power spectrum to a network management device (not shown in fig. 1). And the network management equipment determines the running state of the optical transmission path according to the target power spectrum. Alternatively, the optical communication system may further include a power adjustment device 104. The power measurement device 103 transmits the target power spectrum to the power adjustment device 104. The power adjustment device 104 is used to adjust the power of the target optical signal according to the target power spectrum. The power conditioning device 104 is used to transmit the adjusted target optical signal to the receiving end 105.

In this application, N is an integer greater than 1. X is an integer greater than 0 and less than N. M is an integer greater than or equal to N. When M is greater than N, the first optical signal includes optical signals of N wavelengths and optical signals of M-N wavelengths. When M is equal to N, the first optical signal includes optical signals of N wavelengths. The power measurement method is described below with M equal to N as an example. Fig. 2 is a schematic flow chart of a power measurement method provided in the present application. As shown in fig. 2, the power measurement method includes the following steps.

In step 201, a power measurement device acquires a first power spectrum of a first optical signal over N wavelengths. The power measurement device may obtain the first power spectrum in a number of ways. Described separately below.

In a first manner, the power measurement device may derive a first power spectrum from the total power of the measurement optical signal. In particular, the light splitting device may be a light splitter. The optical splitter splits the first optical signal into a measurement optical signal and a target optical signal according to a target splitting ratio. Both the measurement optical signal and the target optical signal comprise optical signals of N wavelengths. The power measurement device receives the measurement optical signal through the PD to obtain the measurement total power of the measurement optical signal. The power measurement device obtains the total power of the first optical signal according to the measured total power and the target splitting ratio. The power measurement device divides the total power of the first optical signal by N to obtain the power distribution of the first optical signal over the N wavelengths. At this time, the power distribution of the first optical signal is also referred to as a first power spectrum.

In a second approach, the power measurement device obtains a first power spectrum of the first optical signal from a last power measurement device. In the optical transmission path between the receiving end and the transmitting end, one or more power measuring devices may be provided. Each power measuring device is connected with one light splitting device. For example, in fig. 1, another optical splitting device is further included between the transmitting end 101 and the optical splitting device 102, and another power measurement device is connected to the other optical splitting device. At this time, the other power measurement device is the last power measurement device. It should be understood that when another optical splitter is not included between the transmitting end 101 and the optical splitter 102, the transmitting end 101 is the last power measuring device. At this time, the power measurement apparatus receives the first power spectrum from the transmitting end 101. Also, even when another optical splitter is included between the transmitting end 101 and the optical splitter 102, the transmitting end 101 may serve as the last power measuring device. For convenience of description, in the following description, the above power measurement device is taken as an example of the transmitting end 101 to be correspondingly described. The present application does not limit the manner in which the last power measurement device acquires the first power spectrum.

The optical transmission path between the last power measurement device and the optical splitting device 102 may include an optical device. At this time, the last power measuring device is used to output the second optical signal to the optical device in the optical transmission path. The optical device is configured to receive the second optical signal and output the first optical signal to the optical splitter 102. Wherein the power spectrum of the second optical signal may change as the second optical signal passes through the optical device.

Thus, in the third mode, the power measurement device may derive the first power spectrum from the optical device and the second power spectrum of the second optical signal. Fig. 3 is a second schematic diagram of an optical communication system provided in the present application. As shown in fig. 3, the optical communication system includes a transmitting end 101, an optical splitter 102, and a power measuring device 103. The optical transmission path between the transmitting end 101 and the optical splitter 102 includes an optical device 301. The transmitting end 101 is configured to transmit a second optical signal including N wavelengths to the optical device 301. The transmitting end 101 is further configured to transmit a second power spectrum of the second optical signal to the power measurement device 103. The optical device 301 is configured to receive a second optical signal with N wavelengths. The optical device 301 is configured to transmit a first optical signal including N wavelengths to the optical splitting device 102. The optical splitter 102 is configured to obtain a measurement optical signal and a target optical signal according to the first optical signal. The optical splitting device 102 is used to transmit the measurement optical signal to the power measurement device 103. The optical splitter 102 is used to transmit the target optical signal to a receiving end (not shown).

When the optical device 301 is a total power measurement point, the power measurement device 103 may obtain a first power spectrum from the second power spectrum and the total power measured by the total power measurement point. For example, the power measurement device 103 obtains a first power spectrum according to equation 1.

Wherein, P _b (λ _i ) Representing the power of the first optical signal at the ith wavelength. i is greater than 0 and less than or equal to N. When i is equal to 1 to N, P _b (λ _i ) Representing the power distribution of the first optical signal over N wavelengths, i.e. P _b (λ _i ) Representing a first power spectrum. Similarly, P _a (λ _i ) Representing the power of the second optical signal at the ith wavelength. When i is equal to 1 to N, P _a (λ _i ) Representing the power distribution of the second optical signal over N wavelengths, i.e. P _a (λ _i ) Representing a second power spectrum. P is _total The total power of the first optical signal measured for the total power measurement point.

Representing the total power of the second optical signal.

When the optical device 301 is an optical amplifier, the power measurement apparatus 103 may obtain the first power spectrum from the second power spectrum and the gain profile of the optical amplifier. For example, the power measurement device 103 acquires the first power spectrum according to equation 2.

P _b (λ _i )＝P _a (λ _i )×G _now (λ _i ) Equation 2

Wherein, P _b (λ _i ) Representing a first power spectrum. Similarly, P _a (λ _i ) Representing a second power spectrum. G _now (λ _i ) Is the gain of the optical signal at the ith wavelength of the optical amplifier. When i is equal to 1 to N, G _now (λ _i ) Representing the gain distribution of the first optical signal over N wavelengths of the optical amplifier. Equation 2 shows that the power measurement device 103 adds the power and the gain of the same wavelength in the second power spectrum and the gain distribution to obtain the first power spectrum. Wherein, according to P _a (λ _i ) Equation 2 can also be expressed as a power and gain multiplication.

When the optical device 301 is a length of optical fiber, the power measurement device 103 may derive the first power spectrum from the second power spectrum and the SRS effect of the optical fiber. For example, the power measurement device 103 acquires the first power spectrum according to equation 3.

P _b (λ _i )＝P _a (λ _i )×Z(λ _i ) Equation 3

Wherein, P _b (λ _i ) Representing a first power spectrum. Similarly, P _a (λ _i ) Representing a second power spectrum. Z (lambda) _i ) Which represents the coefficient of influence of the SRS effect of the optical fiber on the optical signal of wavelength i. Z (lambda) _i ) Can be expressed by the following formula.

Where gr is the stimulated raman coefficient of the fiber. gr is primarily related to the spacing between wavelengths。P _a (λ _i ) Representing a second power spectrum. Leff _i Indicating the effective length of the fiber at the ith wavelength. Omega _i Indicating the frequency of the optical signal at the ith wavelength. Sigma _i Representing the loss at the ith wavelength. L is the length of the fiber.

When the optical device 301 comprises one combiner and a total power measurement point, the combiner is configured to receive N second optical signals from a transmitting end comprising N transmitting devices. Each second optical signal includes a wavelength. The N second optical signals correspond to the N transmitting devices one to one. The combiner is used for combining the N second optical signals to obtain a first optical signal with N wavelengths. The total power measurement point is used to measure the total power of the first optical signal. At this time, the power measurement device 103 may receive N powers from N transmission devices. The N powers correspond to the N second optical signals one to one. The N powers are the second power spectrum. The power measurement device 103 obtains a first power spectrum from the second power spectrum and the total power of the first optical signal. The specific processing method can refer to the foregoing formula 1.

It is understood that in practical applications, the optical device 301 may also comprise more optical devices. At this time, the power measurement device 103 may sequentially calculate the influence of each optical device on the optical signal, resulting in a first power spectrum. For example, fig. 4 is a third structural diagram of the optical communication system provided in the present application. As shown in fig. 4, the optical communication system includes a transmitting end 101 and an optical splitter 102. The transmitting end 101 is configured to transmit a second optical signal including N wavelengths to a receiving end (not shown in the figure) through an optical transmission path. The optical transmission path includes an optical device 301. The optical device 301 is configured to receive the second optical signal and transmit the first optical signal to the optical splitter 102. The optical splitter 102 is configured to obtain a measurement optical signal and a target optical signal according to the first optical signal. The optical splitter 102 is used to transmit the target optical signal to the receiving end. The optical splitting device 102 is used to transmit the measurement optical signal to a power measurement device (not shown in the figure). The optical device 301 includes a total power measurement point 401, an Optical Amplifier (OA) 402, and an optical fiber 403.

Total power measurement point 401 is used to receive the second optical signal and transmit optical signal 1 to OA 402. The total power measurement point 401 is also used to measure the total power of the second optical signal. The power measurement device 103 is configured to obtain a second power spectrum of the second optical signal from the transmitting end 101. From the total power of the second optical signal and the second power spectrum, the power measurement device 103 obtains the power spectrum of the optical signal 1 according to equation 1. The OA 402 is for receiving the optical signal 1.OA 402 is also configured to amplify optical signal 1 and transmit amplified optical signal 2 to optical fiber 403. From the gain distribution of OA 402 and the power spectrum of optical signal 1, power measurement apparatus 103 obtains the power spectrum of optical signal 2 according to equation 2. The optical fiber 403 is used for receiving the optical signal 2 and transmitting the first optical signal to the optical splitter 102. From the SRS effect of the optical fiber 403 and the power spectrum of the optical signal 2, the power measurement device 103 obtains a first power spectrum of the first optical signal according to equation 3.

In step 202, the power measurement device acquires X powers of X sub-optical signals. Each sub-optical signal is one or more wavelength signals in the first optical signal. X is an integer greater than 0 and less than N.

As can be seen from the foregoing description in fig. 1, fig. 3 or fig. 4, the optical splitter 102 is configured to obtain the measurement optical signal and the target optical signal according to the first optical signal. The power measuring device obtains X powers from the measured optical signal. In practical applications, the splitter 102 can be designed by those skilled in the art according to the requirement. The following are several examples of the spectroscopy device 102 provided herein.

First, the light splitting device 102 includes a first splitter and X first splitters. The first wave splitter is used for splitting the first optical signal into N optical signals with different wavelengths. The first optical splitter is used for transmitting X optical signals to X first optical splitters. The first wave splitter is also used for outputting N-X optical signals. The X first optical splitters are used for receiving X optical signals. The X first optical splitters correspond to the X optical signals one by one. The X first optical splitters are used for splitting the X optical signals into X sub-optical signals and X output optical signals. Each sub-optical signal and each output optical signal carry the same data. The X first optical splitters are used for outputting X output optical signals. The X first splitters are used to transmit X sub-optical signals to the power measurement device. The X sub-optical signals are the measuring optical signals. The power measuring equipment is used for measuring the power of the X sub-optical signals to obtain X powers.

For example, assume that N equals 3.X is equal to 2. Fig. 5 is a schematic diagram of a fourth structure of the optical communication system provided in the present application. As shown in fig. 5, the optical communication system includes a transmitting end 101, an optical splitter 102, a power measuring device 103, and a receiving end 105. The transmitting end 101 is configured to transmit a first optical signal including 3 wavelengths to the receiving end 105 through the optical splitter 102. The optical branching device 102 includes a demultiplexer 501, a first optical splitter 502, and a first optical splitter 503. The splitter 501 is used to split the first optical signal into 3 optical signals of different wavelengths. The 3 optical signals of different wavelengths are λ 1, λ 2 and λ 3, respectively. The demultiplexer 501 is used to transmit λ 1 to the first optical splitter 502. The demultiplexer 501 is used to transmit λ 2 to the first optical splitter 503. The first optical splitter 502 is used to split λ 1 into λ 1 sub optical signals and λ 1 output optical signals. The first optical splitter 503 is used to split λ 2 into λ 2 sub optical signals and λ 2 output optical signals. The receiving end 105 includes a receiving device 504, a receiving device 505, and a receiving device 506. Receiving device 504 is configured to receive the λ 1 output optical signal from first optical splitter 502. The receiving device 505 is configured to receive the λ 2 output optical signal from the first optical splitter 503. The receiving device 506 is used to receive λ 3 from the demultiplexer 501. The power measurement device 103 is configured to receive 2 sub-optical signals from the first optical splitter 502 and the first optical splitter 503. The 2 sub optical signals are the λ 1 sub optical signal and the λ 2 sub optical signal, respectively. The power measurement device 103 is configured to measure the power of 2 sub-optical signals, and obtain 2 powers.

In fig. 5, λ 1 output optical signal, λ 2 output optical signal, and λ 3 are also referred to as a target optical signal or a first optical signal. The demultiplexer and the first optical splitter belong to an optical device in an optical transmission path. The wave separator is used for realizing the wave separation of the first optical signal and obtaining X sub-optical signals. Therefore, the cost of the power measuring equipment can be reduced.

Second, the optical splitting device 102 includes a WSS. The WSS is configured to receive the first optical signal. The WSS includes an output port and a measurement port. The WSS transmits X sub-optical signals to the power measurement device through the measurement port. The WSS outputs a first optical signal through an output port. The power measurement device is used for receiving X sub-optical signals from a measurement port of the WSS. The X sub-optical signals are the measuring optical signals. The power measuring equipment is used for measuring the power of the X sub-optical signals to obtain X powers. Also, to reduce the cost of the power measurement device, the WSS may include only one measurement port. At this time, the power measuring apparatus receives X sub-optical signals by one PD time division.

For example, fig. 6 is a fifth structural diagram of the optical communication system provided in the present application. As shown in fig. 6, the optical communication system includes a transmitting end 101, an optical splitter 102, a power measuring device 103, and a receiving end 105. The transmitting end 101 is configured to transmit a first optical signal including 3 wavelengths to the receiving end 105 through the optical splitter 102. The optical splitting apparatus 102 includes a WSS 601. The WSS601 is configured to receive a first optical signal from the transmitting end 101. WSS601 includes ports 1-4. Port 1 is a measurement port. Ports 2-4 are output ports. The WSS601 is used to demultiplex the first optical signal to obtain λ 1, λ 2, and λ 3.WSS 601 outputs λ 1 through port 2.WSS 601 outputs λ 2 through port 3.WSS 601 outputs λ 3 through port 4. The receiving end 105 includes a receiving apparatus 602, a receiving apparatus 603, and a receiving apparatus 604. The receiving device 602 is configured to receive λ 1 from the WSS 601. The receiving device 603 is configured to receive λ 2 from the WSS 601. The receiving device 604 is used to receive λ 3 from the WSS 601. The WSS601 has the ability to illuminate an optical signal at one wavelength to two different ports. Therefore, at the first time, the WSS601 can also output the λ 1 sub-optical signal through the port 1. At the second time, the WSS601 may also output the λ 2 sub-optical signal through port 1. The power measurement device 103 is connected to port 1 of the WSS 601. The power measuring device 103 is used for receiving 2 sub optical signals in a time-sharing manner. The 2 sub optical signals are λ 1 sub optical signal and λ 2 sub optical signal, respectively. The power measuring device 103 measures the power of 2 sub-optical signals by one PD time division, and obtains 2 powers.

In fig. 6, λ 1, λ 2, and λ 3 are also referred to as a target optical signal or a first optical signal. The WSS601 belongs to an optical device in an optical transmission path. The WSS is used to both implement wavelength selection of the first optical signal and obtain X sub-optical signals. Therefore, the cost of the power measuring equipment can be reduced. Also, the power measurement device can flexibly adjust the value of X, and/or the number of wavelengths per sub-optical signal, through the WSS 601. For example, at a first time, WSS601 outputs a λ 2 sub-optical signal through port 1. At a second time, the WSS601 outputs the λ 3 sub-optical signal through port 1. For example, at a first time, WSS601 outputs a sub-optical signal including λ 1 and λ 2 through port 1. At a second time, the WSS601 outputs the λ 3 sub-optical signal through port 1. Therefore, the present application may increase the flexibility of power measurement.

Finally, the light splitting device 102 comprises a second light splitter. The second optical splitter is used for receiving the first optical signal from the receiving end. The second optical splitter is used for splitting the first optical signal into a target optical signal and a measurement optical signal. For example, fig. 7 is a sixth structural diagram of the optical communication system provided in the present application. As shown in fig. 7, the optical communication system includes a transmitting end 101, an optical splitter 102, a power measuring device 103, and a receiving end 105. The transmitting end 101 is configured to transmit a first optical signal including 3 wavelengths to the receiving end 105 through the optical splitter 102. The light splitting apparatus 102 includes a second light splitter 701. The second optical splitter 701 is configured to split the first optical signal into a target optical signal and a measurement optical signal. The target optical signal and the measuring optical signal comprise optical signals with N wavelengths. The second optical splitter 701 is used to transmit the target optical signal to the receiving end 105. The second optical splitter 701 is used to transmit the measurement optical signal to the power measurement device 103. The power measurement device 103 is configured to divide the measurement optical signal into X sub-optical signals. For example, the power measurement device 103 comprises a second splitter. The second wave splitter is used for splitting the measuring optical signal into X sub-optical signals. The power measurement device 103 is configured to measure the power of X sub-optical signals, and obtain X power.

In fig. 7, the number of splitters can be reduced by connecting the second splitter after the second splitter. For example, in fig. 5, 2 splitters are included. In fig. 7, 1 beam splitter is included. Therefore, the cost of measuring power can be reduced.

As can be seen from the foregoing description, the first optical signal includes N optical signals. The N optical signals correspond to the N wavelengths one to one. The value of X is less than N. Among the X sub-optical signals, each sub-optical signal includes one or more optical signals of the N optical signals. For example, N has a value of 120. The value of X is 2. At this time, the first optical signal includes 120 wavelength signals. The 120 wavelength signals are arranged in wavelength order. The X sub optical signals include a first sub optical signal and a second sub optical signal. The first sub-optical signal is the first 60 wavelength signals of the 120 wavelength signals. The second sub optical signal is the last 60 wavelength signals of the 120 wavelength signals. For example, N has a value of 120. The value of X is 50. At this time, the first optical signal includes 120 wavelength signals. The 60 sub optical signals include 30 first sub optical signals and 20 second sub optical signals. Each first sub optical signal comprises 3 wavelength signals of the 120 wavelength signals. Each second sub optical signal includes 1 wavelength signal of the 120 wavelength signals. The remaining 10 wavelength signals of the 120 wavelength signals are discarded.

In practical applications, X sub-optical signals may be used to calculate the slope of the power profile of the first optical signal with blurring. The accuracy of the slope is related to the following. On the one hand, the more optical signals covered by X sub-optical signals, i.e. the fewer wavelength signals discarded from the N wavelength signals, the more accurate the slope obtained by the power measurement device 103. Thus, the present application may define that the X sub-optical signals comprise optical signals of N wavelengths. On the other hand, in the case where the optical signal is not discarded, the slope of the first power spectrum obtained by the power measurement device 103 is more accurate as the value of X approaches N. When X is equal to N, then the power measurement device 103 can obtain a complete power spectrum. However, the smaller the value of X, the fewer the number of times the power measurement device 103 measures the quantum optical signal, so that the measurement efficiency can be improved. Therefore, in order to obtain a more accurate slope on the basis of improving the detection efficiency, the application can limit the value of X to be equal to 2. At this time, the X sub optical signals include a first sub optical signal and a second sub optical signal. X is equal to 2. The first photon signal is the front one of the N wavelength signals

A signal of one wavelength. The second sub-optical signal is the last of the N wavelength signals

A signal of one wavelength.

In practical applications, to reduce the cost of the wavelength division device, each of the X sub-optical signals is an optical signal having a plurality of consecutive wavelengths. And, each sub-optical signal covers the same wavelength range. For example, when X is equal to 3, the 3 sub optical signals include a first sub optical signal, a second sub optical signal, and a third sub optical signal. The first sub optical signal includes the first 40 wavelength signals of the 120 wavelength signals. The third sub optical signal includes the last 40 wavelength signals of the 120 wavelength signals. The second sub optical signal includes the remaining 40 wavelength signals of the 120 wavelength signals.

In step 203, the power measurement device corrects the first power spectrum according to the X powers, so as to obtain a target power spectrum of the first optical signal at N wavelengths.

As can be seen from the foregoing description of step 201, the power measurement device can obtain a first power spectrum. As can be seen from the foregoing description of step 202, the power measurement device can obtain X powers of X sub-optical signals. And the power measurement equipment corrects the first power spectrum according to the X powers to obtain a target power spectrum of the first optical signal on the N wavelengths. For example, fig. 8 is a schematic diagram of a target power spectrum provided herein. As shown in fig. 8, the first power spectrum corresponds to a power curve 801. The power measurement device may derive a power curve 802 from the X powers. The power measurement device derives a power curve 803 from the power curve 801 and the power curve 802. The power curve 803 is the target power spectrum.

It should be understood that fig. 8 is only a graphical illustration. In practical applications, the correction process of the power measuring device 103 can also be formulated.

For example, the power measurement device 103 obtains the first power spectrum according to the first manner in the foregoing step 201. At this time, in the first power spectrum, the powers of the N wavelength signals are the same. Suppose X equals 2. The X sub optical signals include a first sub optical signal and a second sub optical signal. The X powers include a first power of the first sub optical signal and a second power of the second sub optical signal. The power measuring device 103 is based on

A first slope t is obtained. g1 is the first power. And g2 is the second power. f1 is the center wavelength of the first sub-optical signal. f2 is the second sub-lightThe center wavelength of the signal. The power measurement device 103 obtains a target power spectrum according to the first slope tdirst power spectrum. The slope of the target power spectrum is related to the first slope t. For example, the slope of the target power spectrum is a first slope. The total power value of the target power spectrum over the N wavelengths is equal to the total power value of the first power spectrum over the N wavelengths.

For example, in a power measuring device

After the first slope t is obtained, the power measurement equipment obtains a target power spectrum according to the following formula:

wherein, P (lambda) _i ) Representing the power of the signal at the ith wavelength in the target power spectrum. i is an integer greater than 0 and less than N. Pa (lambda) _i ) Representing the power of the signal at the ith wavelength in the first power spectrum. F represents the size of the wavelength interval of the N wavelength signals.

The foregoing describes a scenario where N is equal to M, and the following describes a scenario where M is greater than N. At this time, the first optical signal includes a traffic optical signal and a dummy optical signal. The dummy optical signal includes N wavelengths. The traffic optical signal includes M-N wavelengths. The traffic optical signal carries a set-top signal. The tune-to-peak signal refers to the power perturbation imposed on the different wavelength signals. For example M-N equals 10. The 10 wavelength signals carry power disturbances at 10 different frequencies. There is a one-to-one correspondence of 10 different power perturbations and 10 wavelength signals. The power measuring device can determine the corresponding wavelength signal through the power disturbance, and further determine the power of the corresponding wavelength signal. Therefore, the power measurement device can acquire the service power spectrum of the service optical signal on the M-N wavelengths according to the tuning signal. The power measurement device acquires a target power spectrum of the false optical signal according to the manner. For example, fig. 9 is a schematic diagram of a traffic power spectrum and a target power spectrum provided in the present application. As shown in fig. 9, the traffic power spectrum corresponds to a power curve 902. The target power spectrum corresponds to the power curve 901. The ranges of the abscissas of the power curve 901 and the power curve 902 are different, that is, the wavelength ranges of the dummy optical signal and the service optical signal are different.

The dummy optical signal does not carry traffic data, and thus modulation may not be required. The traffic optical signal carries traffic data and therefore needs to be modulated. If the sending end 101 needs to add a tune-to-top signal to the service optical signal, the sending end 101 may add the tune-to-top signal in the process of modulating the service optical signal. If the transmitter 101 needs to add a modulated top signal to the dummy optical signal, the transmitter 101 needs to add an additional modulator, thereby increasing the cost of the transmitter 101. However, the accuracy of the power spectrum measured by the pilot tone signal is higher. In the present application, the power measurement device obtains the service power spectrum and the target power spectrum according to different modes. Therefore, the cost for acquiring the target power spectrum can be reduced on the basis of improving the accuracy of the service power spectrum.

As can be seen from the foregoing description, the accuracy of the traffic power spectrum is generally higher than the accuracy of the target power spectrum. Therefore, the power measurement device 103 may modify the target power spectrum by using the service power spectrum, so as to obtain a modified target power spectrum. For example, in fig. 9, at the nth wavelength, the power curve 901 has a value of 10. At the N +1 th wavelength, the power curve 902 has a value of 13. After the correction, the value of the power curve 901 is 12 at the nth wavelength.

As can be seen from the foregoing description, the power measurement device can obtain the traffic power spectrum from the pilot tone signal. The traffic power spectrum may be expressed as a correspondence of M-N power and M-N wavelength. In the aforementioned step 202, the power measurement device needs to acquire X powers. Therefore, to reduce the cost of the power measurement device, the power measurement device may obtain X powers out of the M-N powers. At this time, each of the X sub optical signals is an optical signal of a partial wavelength in the traffic optical signal. For example, the traffic optical signal includes 10 wavelength signals. The X sub optical signals include 2 sub optical signals. 2 sub optical signals. Including a first sub optical signal and a second sub optical signal. The first sub optical signal is the first 5 wavelength signals in the traffic optical signal. The first sub optical signal is the last 5 wavelength signals in the service optical signal.

The power measurement method in the present application is described above. The power measuring device in the present application is described below. Fig. 10 is a schematic structural diagram of a power measurement device provided in the present application. As shown in fig. 10, the power measurement apparatus 1000 includes a first obtaining module 1001, a second obtaining module 1002, and a correcting module 1003. The first obtaining module 1001 is configured to obtain a first power spectrum of the first optical signal at N wavelengths. N is an integer greater than 1. The first optical signal includes M wavelengths. M is an integer greater than or equal to N. The second obtaining module 1002 is configured to obtain X powers. The X powers correspond to the X sub-optical signals one-to-one. Each sub-optical signal is one or more wavelength signals in the first optical signal. Each sub-optical signal includes a different wavelength. X is an integer greater than 0 and less than N. The correcting module 1003 is configured to correct the first power spectrum according to the X powers, so as to obtain a target power spectrum of the first optical signal at N wavelengths.

In other embodiments, the modules of the power measurement apparatus 1000 are also used to perform some or all of the functions that the power measurement device 103 can perform in the aforementioned power measurement method. For example, the first obtaining module 1001 is configured to obtain a first power spectrum from the transmitting end 101. For example, the modification module 1003 is further configured to modify the target power spectrum according to the service power spectrum, so as to obtain a modified target power spectrum. For example, the second acquisition module 1002 is configured to receive X sub-optical signals from a measurement port of the WSS.

The power measuring device in the present application is described above, and the power measuring apparatus in the present application is described below. Fig. 11 is a schematic structural diagram of a power measurement device provided in the present application. As shown in fig. 11, the power measurement device 1100 includes a memory 1103 and a processor 1101.

The processor 1101 may be a Central Processing Unit (CPU), a Network Processor (NP), or a combination of a CPU and an NP. The memory 1103 may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. In other embodiments, the processor 1101 may also be the transceiver 1102. The transceiver 1102 may be a fiber optic transceiver or a radio frequency module, etc. The memory 1103 stores therein a first power spectrum of the first optical signal at N wavelengths. N is an integer greater than 1. The first optical signal includes M wavelengths. M is an integer greater than or equal to N. The memory 1103 also stores X powers. The X powers correspond to the X sub-optical signals one-to-one. Each sub-optical signal is one or more wavelength signals in the first optical signal. Each sub-optical signal includes a different wavelength. X is an integer greater than 0 and less than N. The processor 1101 is configured to correct the first power spectrum according to the X powers, so as to obtain a target power spectrum of the first optical signal on N wavelengths.

In other embodiments, the power measurement device 1100 is also configured to perform some or all of the functions that the power measurement device 103 can perform in the aforementioned power measurement methods.

The application also provides a digital processing chip. Integrated with circuitry and one or more interfaces to implement the functionality of the processor 1101 described above. When integrated with memory, the digital processing chip may perform the method steps of any one or more of the preceding embodiments.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application.

Claims

1. A method of power measurement, comprising:

acquiring a first power spectrum of a first optical signal on N wavelengths, wherein N is an integer greater than 1, the first optical signal comprises M wavelengths, and M is an integer greater than or equal to N;

obtaining X powers, wherein the X powers correspond to X sub-optical signals one to one, each sub-optical signal is one or more wavelength signals in the first optical signal, each sub-optical signal comprises different wavelengths, and X is an integer greater than 0 and less than N;

and correcting the first power spectrum according to the X powers to obtain a target power spectrum of the first optical signal on the N wavelengths.

2. The method of claim 1,

the obtaining of the X powers includes:

receiving the X sub-optical signals from a measurement port of a Wavelength Selective Switch (WSS) to obtain the X powers of the X sub-optical signals;

wherein the WSS comprises an output port for outputting the first optical signal and the measurement port.

3. The method of claim 1,

the obtaining of the X powers includes:

receiving the X sub-optical signals from X first optical splitters, where the X sub-optical signals correspond to the X first optical splitters one to one, and obtaining the X powers of the X sub-optical signals;

the X first optical splitters are configured to receive X optical signals from the first optical splitter, split the X optical signals into the X sub-optical signals and X output optical signals, and output the X output optical signals;

the first wave splitter is used for splitting the first optical signal into N optical signals, and the N optical signals correspond to the N wavelengths one to one.

4. The method of claim 1,

the obtaining of the X powers includes:

receiving a measurement optical signal from a second optical splitter, and dividing the measurement optical signal into the X sub-optical signals through a second optical splitter to obtain the X powers of the X sub-optical signals;

wherein the second optical splitter is configured to split the first optical signal into the target optical signal and the measurement optical signal.

5. The method of any of claims 1-4, wherein the X sub-optical signals comprise the N wavelengths of optical signals.

6. The method of any of claims 1 to 5, wherein each of the X sub-optical signals is an optical signal having a plurality of consecutive wavelengths.

7. The method according to any one of claims 1 to 6, wherein the first optical signal is obtained by passing the second optical signal through an optical amplifier;

the acquiring a first power spectrum of the first optical signal over N wavelengths includes:

acquiring a second power spectrum of the second optical signal on the N wavelengths;

acquiring gain distribution of the optical amplifier on the N wavelengths;

and adding the power and the gain with the same wavelength in the second power spectrum and the gain distribution to obtain the first power spectrum.

8. The method according to any one of claims 1 to 6, wherein the first optical signal is obtained by passing N second optical signals through a third combiner;

acquiring the total power of the N second optical signals on the N wavelengths;

acquiring second power spectrums of the N second optical signals on the N wavelengths;

and adjusting the second power spectrum by using the total power to obtain the first power spectrum of the first optical signal on the N wavelengths.

9. The method of any one of claims 1 to 6, wherein the first optical signal is obtained by passing a second optical signal through an optical fiber;

and obtaining the first power spectrum according to the Stimulated Raman Scattering (SRS) effect of the second optical signal in the optical fiber and the second power spectrum.

10. The method according to any one of claims 1 to 9, wherein M is an integer greater than N, the first optical signal includes a service optical signal and a dummy optical signal, the dummy optical signal includes the N wavelengths, the service optical signal includes M-N wavelengths, and the service optical signal carries a tone-top signal;

the method further comprises the following steps:

and acquiring a service power spectrum of the service optical signal on the M-N wavelengths according to the top-modulation signal.

11. The method of claim 10, further comprising:

and correcting the target power spectrum by using the service power spectrum to obtain the corrected target power spectrum.

12. The method of claim 10, wherein each sub-optical signal is a partial wavelength optical signal in the traffic optical signal.

13. The method according to any one of claims 1 to 12, wherein in the first power spectrum, the powers of the optical signals of the N wavelengths are the same, and the X powers include a first power of a first sub optical signal and a second power of a second sub optical signal;

the method further comprises the following steps:

according to

Obtaining a first slope t, wherein g1 is the first power, g2 is the second power, f1 is the central wavelength of the first sub optical signal, and f2 is the central wavelength of the second sub optical signal;

and the slope of the target power spectrum obtained after the first power spectrum is corrected according to the X powers is the first slope.

14. A power measurement device, comprising:

a first obtaining module, configured to obtain a first power spectrum of a first optical signal at N wavelengths, where N is an integer greater than 1, the first optical signal includes M wavelengths, and M is an integer greater than or equal to N;

a second obtaining module, configured to obtain X powers, where the X powers correspond to X sub-optical signals one to one, each sub-optical signal is one or more wavelength signals in the first optical signal, each sub-optical signal includes different wavelengths, and X is an integer greater than 0 and less than N;

and the correction module is used for correcting the first power spectrum according to the X powers to obtain a target power spectrum of the first optical signal on the N wavelengths.

15. The apparatus of claim 14,

the second obtaining module is configured to obtain X powers, and includes:

the second obtaining module is configured to receive the X sub-optical signals from a measurement port of a wavelength selective switch WSS, and measure the X powers of the X sub-optical signals, where the WSS includes an output port and the measurement port, and the output port is configured to output the first optical signal.

16. The apparatus of claim 14,

the second obtaining module is configured to obtain X powers, and includes:

the second obtaining module is configured to receive the X sub-optical signals from X first optical splitters, and obtain the X powers of the X sub-optical signals;

17. The apparatus of claim 14, wherein the second acquisition module comprises a second splitter;

the second obtaining module is configured to obtain X powers, and includes:

the second obtaining module is configured to receive a measurement optical signal from a second optical splitter, divide the measurement optical signal into the X sub-optical signals by the second optical splitter, and obtain the X powers of the X sub-optical signals;

18. The apparatus of any one of claims 14 to 17, wherein the first optical signal is obtained by passing the second optical signal through an optical amplifier;

the first obtaining module is configured to obtain a first power spectrum of the first optical signal at N wavelengths, and includes:

the first obtaining module is configured to obtain a second power spectrum of the second optical signal at the N wavelengths, obtain gain distribution of the optical amplifier at the N wavelengths, and add power and gain of the same wavelength in the second power spectrum and the gain distribution to obtain the first power spectrum.

19. The apparatus according to any one of claims 14 to 17, wherein the first optical signal is obtained by passing N second optical signals through a third multiplexer;

the first obtaining module is configured to obtain a first power spectrum of the first optical signal at N wavelengths, and includes: the first obtaining module is configured to obtain total power of the N second optical signals over the N wavelengths, obtain second power spectrums of the N second optical signals over the N wavelengths, and adjust the second power spectrums by using the total power to obtain the first power spectrums of the first optical signals over the N wavelengths.

20. The apparatus of any one of claims 14 to 17, wherein the first optical signal is obtained by passing a second optical signal through an optical fiber;

the first obtaining module is configured to obtain a first power spectrum of the first optical signal at N wavelengths, and includes: the first obtaining module is configured to obtain a second power spectrum of the second optical signal at the N wavelengths, and obtain the first power spectrum according to a stimulated raman scattering SRS effect of the second optical signal in the optical fiber and the second power spectrum.

21. The apparatus according to any one of claims 14 to 20, wherein M is an integer greater than N, the first optical signal comprises a service optical signal and a dummy optical signal, the dummy optical signal comprises the N wavelengths, the service optical signal comprises M-N wavelengths, and the service optical signal carries a tone-top signal;

the second obtaining module is further configured to obtain a service power spectrum of the service optical signal on the M-N wavelengths according to the tune-to-top signal.

22. The apparatus of claim 21,

the correction module is further configured to correct the target power spectrum by using the service power spectrum, so as to obtain the corrected target power spectrum.

23. The apparatus of claim 21 wherein each sub-optical signal is a partial wavelength optical signal in the traffic optical signal.

24. The apparatus according to any one of claims 14 to 23, wherein in the first power spectrum, the powers of the N wavelength signals are the same, and the X powers comprise a first power of a first sub optical signal and a second power of a second sub optical signal;

the second obtaining module is further used for obtaining the data according to

25. A power measurement device, comprising: a memory and a processor;

the memory stores first power spectrums of first optical signals on N wavelengths, wherein N is an integer greater than 1, the first optical signals comprise M wavelengths, and M is an integer greater than or equal to N;

the memory is further stored with X powers, the X powers correspond to X sub-optical signals one to one, each sub-optical signal is one or more wavelength signals in the first optical signal, each sub-optical signal includes different wavelengths, and X is an integer greater than 0 and less than N;

the processor is configured to correct the first power spectrum according to the X powers, so as to obtain a target power spectrum of the first optical signal at the N wavelengths.

26. An optical communication system, comprising:

the system comprises a sending end, light splitting equipment, power measuring equipment and a receiving end;

the transmitting end is used for transmitting a first optical signal to the receiving end;

the light splitting device is used for receiving the first optical signal, obtaining a measuring optical signal and a target optical signal according to the first optical signal, and transmitting the target optical signal to the receiving end;

the power measurement device is configured to obtain a first power spectrum of the first optical signal over N wavelengths, where N is an integer greater than 1, the first optical signal includes M wavelengths, and M is an integer greater than or equal to N;

the power measurement equipment is further used for obtaining X powers according to the measurement optical signals, and correcting the first power spectrum according to the X powers to obtain target power spectrums of the first optical signals on the N wavelengths;

the X powers correspond to X sub optical signals one to one, each sub optical signal is one or more wavelength signals in the first optical signal, each sub optical signal includes different wavelengths, and X is an integer greater than 0 and less than N.