CN110708117A

CN110708117A - Method, apparatus and storage medium for determining wavelength information of optical signal

Info

Publication number: CN110708117A
Application number: CN201810747414.9A
Authority: CN
Inventors: 杨波; 黄新刚; 李明生
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2018-07-09
Filing date: 2018-07-09
Publication date: 2020-01-17
Anticipated expiration: 2038-07-09
Also published as: WO2020011175A1; CN110708117B

Abstract

The invention provides a method, a device, a storage medium and an electronic device for determining wavelength information of an optical signal, wherein the method comprises the following steps: dividing the first optical signal into two or more optical signals through a monotonic filtering module, wherein the monotonic filtering module comprises a monotonic filter or a monotonic filter and an optical splitter; determining the power of two or more paths of optical signals into which the first optical signal is divided; determining a first optical power loss characteristic value of the first optical signal passing through the monotonic filter module by using the power of the two or more optical signals into which the first optical signal is divided; and determining the wavelength information of the optical signal corresponding to the first optical power loss characteristic value according to the corresponding relation between the optical power loss characteristic value and the wavelength information of the optical signal, and taking the determined wavelength information of the optical signal as the wavelength information of the first optical signal. The invention solves the problems of expensive price, large volume and complex control circuit of optical signal monitoring equipment in the related technology.

Description

Method, apparatus and storage medium for determining wavelength information of optical signal

Technical Field

The present invention relates to the field of communications, and in particular, to a method, an apparatus, a storage medium, and an electronic apparatus for determining wavelength information of an optical signal.

Background

A Wavelength Division Multiplexing Passive optical network (WDM PON, for short) has the advantages of rich bandwidth, small time delay and good security, and has a wide application prospect in the aspects of radio bearer or private network users in recent years. With the increasing bandwidth demand and the number of access points, the WDM PON system has more and more channels, the channel rate is continuously increased, and the capacity is also larger and larger. In order to ensure that a wdm pon system operates stably and reliably under multi-channel and high-speed conditions, it is necessary to monitor indexes such as wavelength, optical power, and the like of corresponding channels in a central office and terminal equipment. Meanwhile, for a WDM PON system with transparent service transmission, a colorless Optical Network Unit (ONU) needs a wavelength monitoring technology to obtain information of a wavelength channel where the current wavelength is located.

In a traditional Dense Wavelength Division Multiplexing (DWDM) system, an on-line Optical channel Performance Monitor (OPM) module is mainly used to Monitor an Optical channel signal at present. The OPM module for DWDM system uses diffraction grating, array detector, or large-range adjustable filter, so it has the disadvantages of high price, large volume, complex control circuit, and is not suitable for WDM PON system with low cost and high integration.

In view of the above problems in the related art, no effective solution has been proposed.

Disclosure of Invention

The embodiment of the invention provides a method, a device, a storage medium and an electronic device for determining wavelength information of an optical signal, which are used for at least solving the problems of high price, large volume and complex control circuit of optical signal monitoring equipment in the related technology.

According to an embodiment of the present invention, there is provided a method of determining wavelength information of an optical signal, including: dividing the first optical signal into two or more optical signals through a monotonic filtering module, wherein the monotonic filtering module comprises a monotonic filter or a monotonic filter and an optical splitter; determining the power of two or more paths of optical signals into which the first optical signal is divided; determining a first optical power loss characteristic value of the first optical signal passing through the monotonic filter module by using the power of the two or more optical signals into which the first optical signal is divided; and determining the wavelength information of the optical signal corresponding to the first optical power loss characteristic value according to the corresponding relation between the optical power loss characteristic value and the wavelength information of the optical signal, and taking the determined wavelength information of the optical signal as the wavelength information of the first optical signal.

According to another embodiment of the present invention, there is provided an apparatus for determining wavelength information of an optical signal, including: the processing module is used for dividing the first optical signal into two or more optical signals through the monotone filtering module, wherein the monotone filtering module comprises a monotone filter or comprises a monotone filter and an optical splitter; the first determining module is used for determining the power of two or more paths of optical signals into which the first optical signal is divided; a second determining module, configured to determine a first optical power loss characteristic value of the first optical signal passing through the monotonic filtering module by using power of two or more optical signals into which the first optical signal is divided; and a third determining module, configured to determine wavelength information of the optical signal corresponding to the first optical power loss characteristic value according to a correspondence between the optical power loss characteristic value and the wavelength information of the optical signal, and use the determined wavelength information of the optical signal as the wavelength information of the first optical signal.

According to a further embodiment of the present invention, there is also provided a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.

According to yet another embodiment of the present invention, there is also provided an electronic device, including a memory in which a computer program is stored and a processor configured to execute the computer program to perform the steps in any of the above method embodiments.

The invention uses the monotonous filter module to split the light signal, and the monotonous filter module is composed of the monotonous filter or the monotonous filter and the light splitter, because the monotonous filter and the light splitter have low cost, small volume and easy control, the problems of expensive price, large volume and complex control circuit of the light signal monitoring equipment in the related technology can be solved, and the effects of low cost, small volume and easy control are achieved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a flow chart of a method of determining wavelength information of an optical signal according to an embodiment of the present invention;

fig. 2 is a block diagram of a structure of a wavelength information monitoring apparatus according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a wavelength information monitoring method according to a first embodiment;

FIG. 4 is a diagram illustrating a relationship between an optical power loss value and wavelength information according to a first embodiment;

FIG. 5 is a first block diagram of a wavelength information monitoring device according to a first embodiment;

FIG. 6 is a second block diagram of a wavelength information monitoring device according to a first embodiment;

FIG. 7 is a diagram illustrating a method for monitoring wavelength information according to a second embodiment;

fig. 8 is a diagram illustrating a relationship between an optical power loss value and wavelength information according to a second embodiment;

fig. 9 is a schematic diagram of a first wavelength information monitoring apparatus according to a second embodiment;

fig. 10 is a second schematic diagram of a wavelength information monitoring apparatus according to a second embodiment;

fig. 11 is a schematic diagram of a wavelength information monitoring method according to a third embodiment;

fig. 12 is a diagram illustrating a relationship between an optical power loss value and wavelength information according to a third embodiment;

fig. 13 is a first structural diagram of a wavelength information monitoring apparatus according to a third embodiment;

fig. 14 is a second structural diagram of a wavelength information monitoring apparatus according to a third embodiment;

FIG. 15 is a diagram illustrating a method for monitoring wavelength information according to a fourth embodiment;

fig. 16 is a diagram illustrating a relationship between an optical power loss value and wavelength information according to a fourth embodiment;

fig. 17 is a structural diagram of a wavelength information monitoring apparatus according to a fourth embodiment;

FIG. 18 is a schematic diagram of a wavelength information monitoring method according to a fifth embodiment;

fig. 19 is a diagram illustrating a relationship between an optical power loss value and wavelength information according to a fifth embodiment;

fig. 20 is a first schematic diagram of a wavelength information monitoring apparatus according to a fifth embodiment;

fig. 21 is a second schematic diagram of a wavelength information monitoring apparatus according to a fifth embodiment;

FIG. 22 is a diagram illustrating a method for monitoring wavelength information according to a sixth embodiment;

fig. 23 is a diagram illustrating a relationship between an optical power loss value and a wavelength channel according to a sixth embodiment;

FIG. 24 is a schematic view of a wavelength information monitoring apparatus according to a sixth embodiment;

fig. 25 is a flowchart illustrating a method for monitoring wavelength information according to a seventh embodiment;

fig. 26 is a flowchart illustrating a wavelength information adjusting method according to an eighth embodiment;

fig. 27 is a schematic view of a wavelength information adjusting apparatus according to an eighth embodiment;

fig. 28 is an apparatus for determining wavelength information of an optical signal according to an embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

In the present embodiment, a method for determining wavelength information of an optical signal is provided, and fig. 1 is a flowchart of a method for determining wavelength information of an optical signal according to an embodiment of the present invention, as shown in fig. 1, the flowchart includes the following steps:

s102, dividing the first optical signal into two or more optical signals through a monotone filtering module, wherein the monotone filtering module comprises a monotone filter or comprises a monotone filter and an optical splitter;

s104, determining the power of two or more paths of optical signals into which the first optical signal is divided;

s106, determining a first optical power loss characteristic value of the first optical signal passing through the monotonic filter module by using the power of the two or more optical signals into which the first optical signal is divided;

and S108, determining the wavelength information of the optical signal corresponding to the first optical power loss characteristic value according to the corresponding relation between the optical power loss characteristic value and the wavelength information of the optical signal, and taking the determined wavelength information of the optical signal as the wavelength information of the first optical signal.

The apparatus for determining wavelength information of an optical signal may be an apparatus for determining wavelength information of an optical signal, which may also be referred to as an information monitoring apparatus, and its specific structure may be as shown in fig. 2 (where a monotonic filter is included in a monotonic filter optical path in fig. 2), the apparatus may include the monotonic filter module described above, the monotonic filter module may perform S102 described above, and the apparatus may further include a detector and a wavelength identification module, where the detector may perform S104 described above for detecting power of each optical signal, and the wavelength identification module may perform S106 and S108 described above for determining an optical power loss characteristic value and determining wavelength information of an optical signal according to the optical power loss characteristic value. In the above embodiment, the correspondence between the optical power loss characteristic value and the wavelength information of the optical signal may be recorded in a correspondence table, and the correspondence may be predetermined, and the correspondence may be flexibly adjusted, manually adjusted, or automatically adjusted according to an adjustment condition. Among them, the monotonic filter in the above embodiment is a filter in which the loss characteristic value changes monotonically with a change in the wavelength of the optical signal or the size of the wavelength channel of the optical signal, that is, a filter in which the loss characteristic value increases monotonically (or decreases monotonically) with an increase in the wavelength of the optical signal (or the wavelength channel of the optical signal). It should be noted that the loss characteristic value in this embodiment is a loss value corresponding to a certain fixed wavelength, or a loss value corresponding to a wavelength value interval included in a certain wavelength channel, where the corresponding loss value includes a loss maximum value, a loss minimum value, or a loss range value.

Through the embodiment, the monotonic filter module is used for splitting the optical signal and consists of the monotonic filter or the monotonic filter and the light splitter, and the monotonic filter and the light splitter are low in manufacturing cost, small in size and easy to control, so that the problems of high price, large size and complex control circuit of optical signal monitoring equipment in the related technology can be solved, and the effects of low manufacturing cost, small size and easy control are achieved.

In an alternative embodiment, the monotonic filter includes a monotonic increasing filter and/or a monotonic decreasing filter, but may also be a monotonic increasing filter and a monotonic decreasing filter. In the present embodiment, the monotonically increasing filter is a filter in which the loss characteristic value monotonically increases with an increase in the wavelength of the optical signal (or the wavelength channel of the optical signal), and the monotonically decreasing filter is a filter in which the loss characteristic value monotonically decreases with an increase in the wavelength of the optical signal (or the wavelength channel of the optical signal).

In an alternative embodiment, the monotonic filter comprises a linear filter. In the present embodiment, the wavelength information of the optical signal (e.g., the information of the wavelength of the optical signal) and the loss (dB) of the linear filter are in a linear relationship.

In an alternative embodiment, when the monotonic filter module includes one monotonic filter, the monotonic filter is disposed on a transmission optical path of the first optical signal, and the monotonic filter divides the first optical signal into two optical signals by transmitting and reflecting the first optical signal. The following examples are given by way of illustration of specific embodiments:

detailed description of the preferred embodiment

Fig. 3 is a schematic diagram of a wavelength information monitoring method according to a first embodiment, and fig. 5 is a schematic diagram of a corresponding apparatus. The method comprises the following steps:

s302, the reflected light and the transmitted light of the received light signal (corresponding to the first light signal described above, and similar in the later-described embodiments) passing through the monotonic filter are received by the probe 1 and the probe 2, respectively, resulting in P1(λ) and P2(λ);

s304, calculating L (λ) ═ P1(λ) -P2(λ) from the obtained P1 and P2;

and S306, the L (lambda) and the lambda are in one-to-one correspondence, and the wavelength information lambda of the current channel is obtained through table lookup.

The optical power loss characteristic value L (λ) (also referred to as optical power loss value, or loss) is a difference between the reflected optical power and the transmitted optical power of the monotonic filter, i.e., a difference between the reflection loss and the transmission loss of the monotonic filter. Fig. 4 is a diagram showing a correspondence relationship between optical power loss characteristic values L (λ) and λ, where L (λ i) is a difference between reflection loss and transmission loss of the monotonic filter, which corresponds to the wavelength λ i one by one. When the lambda i is larger than or equal to the lambda a and smaller than the lambda b, L (lambda i) is larger than 0 and monotonically decreases; when λ i is equal to λ b, L (λ i) is equal to 0; when λ i is greater than λ b and equal to or less than λ c, L (λ i) is less than 0 and monotonically decreases.

Fig. 5 is a structural diagram of a first wavelength information monitoring apparatus according to a first embodiment, as shown in fig. 5, the apparatus includes a monotonic filtering optical path (corresponding to the monotonic filtering module described above), a detector and a wavelength identification module. The monotonous filtering optical path is a single monotonous increasing (decreasing) filter realized by a thin film filter plate and a reflection and transmission optical path thereof. The reflected optical path and the transmitted optical path are connected to the detector 1 and the detector 2, respectively, to obtain P1(λ) (dBm) and P2(λ) (dBm). The wavelength identification module calculates L (λ) ═ P1(λ) -P2(λ) (dB) from the obtained P1 and P2, and obtains the received optical signal wavelength information λ according to the correspondence between L (λ) and λ shown in fig. 4.

Fig. 6 is a structural diagram of a wavelength information monitoring apparatus according to a first embodiment, as shown in fig. 6, a monotonic filtering optical path in the wavelength monitoring apparatus can also be implemented by an integrated optical waveguide device, monotonic filtering is implemented based on a grating filter optical waveguide device, and a reflection port and a transmission port are respectively connected with a PD1 and a PD2 through optical waveguides. Based on the integrated optical waveguide monotonic filter optical path, a waveguide type optical splitter and a PON signal receiver (PD0) can be integrated at the same time, and a miniaturized receiver integrated chip with a wavelength monitoring function is realized. Alternatively, the monotonic filter device may be composed of a three-port filter device such as a directional coupler, a MZ (mach-zehnder) filter, or a micro-ring resonator.

In an alternative embodiment, when the monotonic filtering module includes a monotonic filter and an optical splitter, the optical splitter is disposed on the transmission optical path of the first optical signal, and the optical splitter is configured to split the first optical signal into two optical signals; the monotonic filter is arranged on a transmission light path of one optical signal of the two optical signals which are split into two paths, and the monotonic filter is only used for transmitting the one optical signal; or, the monotonic filter transmits and reflects one optical signal to divide the one optical signal into two optical signals. The following examples are given by way of illustration of specific embodiments:

detailed description of the invention

Fig. 7 is a schematic diagram of a wavelength information monitoring method according to a second embodiment, and fig. 9 is a corresponding schematic diagram of an apparatus, where the method includes the following steps:

s702, dividing the received optical signal into two parts according to the proportion (R1: R2) by an optical splitter;

s704, inputting the optical signal branched and output by the optical splitter R1 into the optical detector 1 to obtain an optical power value P1, and inputting the optical signal branched and output by the optical splitter R2 into the optical detector 2 after the optical path is transmitted by a linear filter (the linear filter is a monotonic filter whose wavelength and filter loss (dB) are in a linear relationship, and the latter embodiment is similar) to obtain an optical signal P2;

s706, based on the obtained R1: r2, P1 and P2 values, calculating a loss value L (λ) of the optical signal after passing through a linear filtering optical path (also called a monotonic filtering optical path, corresponding to the monotonic filtering module);

and S708, the L (lambda) and the lambda are in one-to-one correspondence, and the wavelength information of the current channel is obtained through table lookup.

The optical power loss characteristic value L (lambda) is a transmission loss value of a monotonic filter, and the monotonic filtering optical path comprises a light splitter and a linear filter. When the splitting ratio of the beam splitter is R1: R2, and the optical power of the detector 1 and the detector 2 is P1(dBm) and P2(dBm), L (λ) is P2- (10log (R2/R1) + P1) (dB). This value is the linear filter transmission spectrum loss value. Fig. 8 is a schematic diagram of a correspondence relationship between filter transmission spectrum loss and wavelength information according to a second embodiment, and as shown in fig. 8, the transmission spectrum loss of a linear filter monotonically increases with wavelength, and the loss L (λ i) differs for different wavelengths λ i. The L (lambda) obtained by the wavelength monitoring method is compared with the transmission spectrum loss of the linear filter, and the wavelength lambda of the current received optical signal can be obtained. When the R1 branch accounts for the main splitting ratio, the detector 1 can be used for PON signal reception while being used for wavelength monitoring. Preferably, R1: R2 is 50: 50.

Fig. 9 is a schematic diagram of a first wavelength information monitoring apparatus according to a second embodiment, as shown in fig. 9, the apparatus includes a monotonic filtering optical path, a detector and a wavelength identification module. The monotonic filter light path is a linear filter realized by a thin film filter and a combined light path of a light splitter with the light splitting ratio of R1: R2. The branch of the optical splitter R1 is connected with the detector 1, and the branch of the optical splitter R2 is connected with the detector 2 after passing through a linear filter, so that P1 (lambda) (dBm) and P2 (lambda) (dBm) are obtained. The wavelength identification module calculates L (λ) ═ P2- (10log (R2/R1) + P1) (dB) from the obtained P1 and P2, and obtains the received optical signal wavelength information λ according to the correspondence between L (λ) and λ shown in fig. 8. In this apparatus, when the R1 branch accounts for the main splitting ratio, the detector 1 is used for wavelength monitoring and simultaneously can be used for PON signal reception. Preferably, R1: R2 is 50: 50.

Fig. 10 is a schematic diagram of a second wavelength information monitoring apparatus according to the second embodiment, and as shown in fig. 10, a monotonic filtering optical path in the wavelength monitoring apparatus can also be implemented by an integrated optical waveguide device, linear filtering is implemented based on a cascaded MZ filter optical waveguide device, and the detector 1 and the detector 2 are monolithically integrated with a filter splitter and are respectively connected to an R1 port of the splitter and an output port of the MZ filter. When the R1 branch accounts for the main splitting ratio, the detector 1 can be used for PON signal reception while being used for wavelength monitoring. Preferably, R1: R2 is 50: 50.

Detailed description of the preferred embodiment

Fig. 11 is a schematic diagram of a wavelength information monitoring method according to a third embodiment, and fig. 13 is a corresponding schematic diagram of an apparatus, where the method includes the following steps:

s1102, dividing the received optical signal into two parts according to the ratio of 1:1 by an optical splitter;

s1104, inputting the optical signal branched and output by the optical splitter R1 into the optical detector 1 to obtain an optical power value P1, inputting the optical signal branched and output by the optical splitter R2 into the optical detector 2 to obtain an optical signal P2 after being transmitted by the monotonic filter, and inputting the optical signal reflected by the monotonic filter into the optical detector 3 to obtain an optical signal P3;

s1106, calculating a loss value L (lambda) of the optical signal after the optical signal passes through a linear filtering optical path according to the obtained P1, P2 and P3 values;

and S1108, enabling the L (lambda) and the lambda to be in one-to-one correspondence, and obtaining the wavelength information of the current channel through table look-up.

The optical power loss characteristic value L (lambda) is a combined value of a transmission loss value and a reflection loss value of the monotonic filter, and the monotonic filtering light path comprises a light splitter with a splitting ratio of 1:1 and a monotonically increasing (decreasing) filter. When the optical power of the detector 1, the detector 2, and the detector 3 is P1(dBm), P2(dBm), and P3(dBm), L (λ) ═ L1(λ), L2(λ) ] (dB), where L1(λ) ═ P2-P1(dB) is a transmission loss value, and L2(λ) ═ P3-P1(dB) is a reflection loss value. As shown in fig. 12, the monotonic filter transmission spectral loss increases with wavelength monotony, and the reflection spectral loss decreases with wavelength monotony. When λ i is less than λ b, L1(λ i) is less than L2(λ i); when λ i is equal to λ b, L1(λ i) is equal to L2(λ i); when λ i is greater than λ b, L1(λ i) is greater than L2(λ i); and L (λ i) ═ L1(λ i), L2(λ i) ] and λ i are in a one-to-one correspondence relationship. Therefore, the wavelength λ can be obtained from the L (λ) obtained by the test in accordance with the correspondence shown in fig. 12.

Fig. 13 is a first structural diagram of a wavelength information monitoring apparatus according to a third embodiment, as shown in fig. 13, the apparatus includes a monotonic filter optical path, a detector and a wavelength identification module. The monotonic filter light path is a monotonic filter realized by a thin film filter and a combined light path of the light splitter with the light splitting ratio of 1: 1. The branch of the beam splitter R1 is connected with the detector 1, the branch of the R2 is respectively connected with the detector 2 and the detector 3 after being transmitted and reflected by the monotonic filter, and P1(dBm), P2(dBm) and P3(dBm) are obtained. The wavelength identification module calculates L (lambda) ([ L1 (lambda) ], L2 (lambda) ] (dB) according to the obtained P1, P2 and P3, wherein L1 (lambda) ═ P2-P1(dB) is a transmission loss value, and L2 (lambda) ═ P3-P1(dB) is a reflection loss value. And obtains the wavelength information λ of the received optical signal according to the corresponding relationship between L (λ) and λ shown in fig. 12.

Fig. 14 is a structural diagram of a wavelength information monitoring apparatus according to a third embodiment, as shown in fig. 14, a monotonic filtering optical path in the wavelength monitoring apparatus can also be implemented by an integrated optical waveguide device, monotonic filtering is implemented based on a directional coupler, and a change relationship of two output port losses of the directional coupler with wavelength is a reciprocal relationship shown in fig. 12. The detector 1, the detector 2 and the detector 3 are integrated with a filter and a beam splitter in a single chip mode and are respectively connected with an R1 port of the beam splitter and two output ports of a directional coupler. Furthermore, the integrated chip can also integrate a PON signal optical splitter and a PON signal receiver PD0, so that the miniaturized receiver integrated chip with the wavelength monitoring function is realized.

In an optional embodiment, when the monotonic filtering module includes three monotonic filters and three optical splitters, the three monotonic filters are a first monotonic filter, a second monotonic filter and a third monotonic filter, respectively, and the three optical splitters are a first optical splitter, a second optical splitter and a third optical splitter, respectively, where the first optical splitter is disposed on a transmission optical path of the first optical signal, and the first optical splitter is configured to split the first optical signal into a first optical signal and a second optical signal; the second optical splitter is arranged on a transmission optical path of the first optical signal, and is used for splitting the first optical signal into a third optical signal and a fourth optical signal; the third optical splitter is arranged on a transmission light path of the second optical signal, and is used for splitting the second optical signal into a fifth optical signal and a sixth optical signal; the first monotonic filter is arranged on a transmission light path of the fourth optical signal and is used for transmitting the fourth optical signal; the second monotonic filter is arranged on a transmission optical path of the fifth optical signal and is used for transmitting the fifth optical signal; the third monotonic filter is arranged on the transmission optical path of the sixth optical signal and is used for transmitting the sixth optical signal. The following examples are given by way of illustration of specific embodiments:

detailed description of the invention

Fig. 15 is a schematic diagram of a wavelength information monitoring method according to a fourth embodiment, and fig. 17 is a corresponding schematic diagram of an apparatus, where the method includes the following steps:

s1502, dividing the received optical signal into four parts of 1:1:1:1 by the optical splitter;

s1504, inputting the optical signal branched and output by the optical splitter R1 into the optical detector 1 to obtain an optical power value P1, inputting the optical signal branched and output by the optical splitter R2 into the optical detector 2 after being transmitted by the linear filter 1 to obtain an optical signal P2, inputting the optical signal into the optical detector 3 after being transmitted by the linear filter 2 to obtain an optical signal P3, and inputting the optical signal into the optical detector 4 after being transmitted by the linear filter 3 to obtain an optical signal P4;

s1506, calculating loss values L1(λ), L2(λ), L3(λ) of the optical signal after each linear filtering, and optical power loss characteristic values L (λ) ═ L1(λ), L2(λ), L3(λ), according to the obtained P1, P2, P3 and P4 values;

and S1508, the L (lambda) and the lambda are in one-to-one correspondence, and the wavelength information of the current channel is obtained through table lookup.

The optical power loss characteristic value L (lambda) is a combined value of transmission loss values of a finite number of linear filters, and the monotone filtering optical path comprises a finite number of optical splitters and linear filters with splitting ratios of 1: 1. When the optical power of the detector 1, the detector 2, the detector 3, and the detector 4 is P1(dBm), P2(dBm), P3(dBm), and P4(dBm), L (λ) ═ L1(λ), L2(λ), L3(λ) ] (dB), where L1(λ) ═ P2-P1(dB) is the transmission loss value of the linear filter 1, L2(λ) ═ P3-P1(dB) is the transmission loss value of the linear filter 2, and L3(λ) ═ P4-P1(dB) is the transmission loss value of the linear filter 3. As shown in fig. 16, the transmission spectral losses of the linear filters 1, 2, and 3 increase monotonically with wavelength within [ λ a, λ b ], [ λ b, λ c ], [ λ c, λ d ], respectively. When λ i is smaller than λ b, the loss of the linear filter 2 and the linear filter 3 is L0; when λ i is greater than λ b and less than λ c, the loss of the linear filter 1 is L1, and the loss of the linear filter 3 is L0; when λ i is larger than λ c, the loss of the linear filter 1 and the linear filter 2 is L1. Therefore, L (λ i) ═ L1(λ i), L2(λ i), L3(λ i) corresponds to λ i one to one. Therefore, the wavelength λ can be obtained from the L (λ) obtained by the test in accordance with the correspondence shown in fig. 16.

Fig. 17 is a structural diagram of a wavelength information monitoring apparatus according to a fourth embodiment, and as shown in fig. 17, the apparatus includes a monotonic filter optical path, a detector and a wavelength identification module. The monotonous filtering light path is a combined light path of a plurality of thin film filter plate linear filters and a plurality of light splitting devices with the light splitting ratio of 1: 1. The branch of the optical splitter R1 is connected with the detector 1, and the branches of the R2, R3 and R4 are respectively connected with the detector 2, the detector 3 and the detector 4 after being transmitted by the linear filter 1, the linear filter 2 and the linear filter 3 to obtain P1(dBm), P2(dBm), P3(dBm) and P4 (dBm). The wavelength identification module calculates L (λ) ═ L1(λ), L2(λ), L3(λ) ] (dB) from the obtained P1, P2, P3 and P4, where L1(λ) ═ P2-P1(dB) is the transmission loss value of the linear filter 1, L2(λ) ═ P3-P1(dB) is the transmission loss value of the linear filter 2, and L3(λ) ═ P4-P1(dB) is the transmission loss value of the linear filter 3. According to the corresponding relationship between L (λ) and λ shown in fig. 16, the wavelength information λ of the received optical signal can be obtained.

In an optional embodiment, when the monotonic filtering module includes two monotonic filters and one optical splitter, the two monotonic filters are a fourth monotonic filter and a fifth monotonic filter, respectively, where the optical splitter is disposed on a transmission optical path of the first optical signal, and the first optical splitter is configured to split the first optical signal into a seventh optical signal and an eighth optical signal; the fourth monotonic filter is arranged on a transmission optical path of the eighth optical signal and is used for dividing the eighth optical signal into a ninth optical signal and a tenth optical signal by reflecting and transmitting the eighth optical signal; the fifth monotonic filter is arranged on the transmission optical path of the tenth optical signal and is used for transmitting the tenth optical signal. The following examples are given by way of illustration of specific embodiments:

detailed description of the preferred embodiment

Fig. 18 is a schematic view of a wavelength information monitoring method according to a fifth embodiment, and fig. 20 is a corresponding schematic view of an apparatus, where the method includes the following steps:

s1802, dividing a received optical signal into two parts of 1:1 by an optical splitter;

s1804, inputting the optical signal branched and output by the optical splitter R1 into the optical detector 1 to obtain an optical power value P1, transmitting the optical signal branched and output by the optical splitter R2 through the filter 1 (monotonic filter), then through the filter 2 (linear filter), transmitting the optical signal into the optical detector 2 to obtain an optical signal P2, and reflecting the optical signal by the filter 1 and inputting the optical signal into the optical detector 3 to obtain an optical signal P3;

s1806, calculating loss values L1(λ), L2(λ) of the optical signal after each linear filtering according to the obtained P1, P2, and P3 values, and obtaining an optical power loss characteristic value L (λ) ([ L1(λ), L2(λ) ];

and S1808, the L (lambda) and the lambda are in one-to-one correspondence, and the wavelength information of the current channel is obtained through table lookup.

The optical power loss characteristic value L (lambda) is a combined value of transmission loss values of the finite linear filters, and the monotone filtering optical path comprises a finite optical splitter with a splitting ratio of 1:1 and a monotone filter. When the optical power of the detector 1, the detector 2 and the detector 3 is P1(dBm), and P2(dBm) and P3(dBm), L (λ) ═ L1(λ), L2(λ) ] (dB), where L1(λ) ═ P2-P1(dB) is the sum of the transmission loss values of the filter 1 and the filter 2, and L2(λ) ═ P3-P1(dB) is the reflection loss value of the filter 1. As shown in fig. 19, the filter 1 transmits in the wavelength range [ λ a, λ b ], i.e., the loss is 0dB at the minimum value Lmin, and the transmission loss increases monotonically in the wavelength range [ λ b, λ c ], and the transmission-reflection loss decreases monotonically in the wavelength range [ λ b, λ c ]. The transmission spectral loss of the linear filter 2 monotonically decreases in the wavelength ranges [ λ a, λ b ], respectively. When λ i is smaller than λ b, L1(λ i) monotonically decreases, and L2(λ i) ═ 0; when λ i is larger than λ b, the L1(λ i) loss value monotonically increases, and the L2(λ i) loss value monotonically decreases. Therefore, L (λ i) ═ L1(λ i), L2(λ i) ] corresponds to λ i one to one. Therefore, the wavelength λ can be obtained from the L (λ) obtained by the test in accordance with the correspondence shown in fig. 19.

Fig. 20 is a schematic diagram of a first wavelength information monitoring apparatus according to a fifth embodiment, as shown in fig. 20, the apparatus includes a monotonic filtering optical path, a detector and a wavelength identification module. The monotonous filtering light path is a combined light path of a plurality of monotonous filters and a light splitting ratio of 1:1 light splitter. The branch of the optical splitter R1 is connected with the detector 1, the optical signal output by the branch R2 is transmitted by the filter 1 (monotonic filter), then transmitted by the filter 2 (linear filter), and then transmitted to the optical detector 2, and reflected by the filter 1 (monotonic filter), and finally input to the optical detector 3. The wavelength identification module calculates L (λ) [ [ L1(λ), L2(λ) ] (dB) ] from P1, P2 and P3 obtained by the photodetectors 1, 2 and 3, where L1(λ) [ [ P2-P1(dB) ] is the sum of the transmission loss values of the filter 1 and the filter 2, and L2(λ) [ [ P3-P1(dB) ] is the reflection loss value of the filter 1. According to the corresponding relationship between L (λ) and λ shown in fig. 19, the wavelength information λ of the received optical signal can be obtained.

Fig. 21 is a schematic diagram of a wavelength information monitoring apparatus according to the fifth embodiment, where as shown in fig. 21, a monotonic filtering optical path in the wavelength monitoring apparatus can also be implemented by an integrated optical waveguide device, a filter 1 is implemented based on a micro-ring resonator, a through port of the micro-ring resonator corresponds to a transmission optical path of the filter 1, and a MZ filter implements a linear filtering function of the filter 2; the drop port of the micro-ring resonator corresponds to the reflection light path of the filter 1, and the loss spectrum of the output port changes as shown in fig. 19. The detector 1, the detector 2 and the detector 3 are integrated with a filter and a beam splitter in a single chip mode and are respectively connected with an R1 port of the beam splitter and two output ports of a directional coupler. Furthermore, the integrated chip can also integrate a PON signal optical splitter and a PON signal receiver, so that the miniaturized receiver integrated chip with the wavelength monitoring function is realized.

In an optional embodiment, the monotonic filter module may further include an optical splitter, a monotonic filter, and an optical etalon, where the optical splitter is disposed on a transmission optical path of the first optical signal, and the optical splitter is configured to split the first optical signal into two optical signals; the monotonic filter is arranged on a transmission light path of one optical signal of the two optical signals which are split into two paths, and the monotonic filter is only used for transmitting the one optical signal; the optical standard is arranged on a transmission path of the transmitted optical signal, and the optical standard is used for transmitting the transmitted optical signal again. The invention is illustrated below with reference to specific examples:

detailed description of the preferred embodiment

Fig. 22 is a schematic diagram of a wavelength information monitoring method according to a sixth embodiment, and fig. 24 is a corresponding schematic diagram of an apparatus, where the method includes the following steps:

s2202, dividing the received optical signal into two parts according to the proportion (R1: R2) by an optical splitter;

s2204, inputting the optical signal branched and output by the optical splitter R1 into the optical detector 1 (the optical detector may also be referred to as a detector in the present invention) to obtain an optical power value P1, and inputting the optical signal branched and output by the optical splitter R2 into the optical detector 2 after being transmitted through the optical path of the linear filter to obtain an optical signal P2;

s2206, according to the obtained R1: r2, P1 and P2 values, and calculating a loss value L (lambda) of the optical signal after the optical signal passes through a linear filtering optical path;

s2208, the L (lambda) range and the lambda wavelength channels are in one-to-one correspondence, and the current wavelength channel information is obtained through table lookup.

Different from the second embodiment, in the present embodiment, in a certain wavelength channel, the loss characteristic value L (λ) and the wavelength value λ are not in a one-to-one correspondence relationship, but the loss value ranges are different between different wavelength channels, that is, the L (λ) range and the wavelength channel are in a one-to-one correspondence relationship, as shown in fig. 23. Preferably, when the wavelength to be measured is the central wavelength of the wavelength channel, the loss value is the minimum value of the loss section, and when the wavelength value deviates from the central wavelength, the loss value L (λ) becomes larger.

As shown in fig. 24, the difference between the wavelength monitoring device implementing the wavelength monitoring method and the specific embodiment of the wavelength monitoring device shown in fig. 9 is that the monotonic filter optical path includes an optical splitter, a linear filter and an optical etalon. The splitter R2 branches through the linear filter and the optical standard and is connected to the detector 2. L (λ) is thus the sum of the transmission losses of the linear filter and the optical etalon.

In an alternative embodiment, determining the power of the two or more optical signals into which the first optical signal is divided by the monotonic filtering module comprises: and determining the power of two or more optical signals into which the first optical signal is divided by the monotonic filtering module by using a detector. That is, in the present embodiment, the power of each optical signal is detected by the detector. Optionally, the detector comprises a passive optical network PON signal receiver.

In an alternative embodiment, when the detector is the PON signal receiver and the first optical signal is split into two optical signals, the splitter splitting ratio R1: R2 is any value in the interval (0,1), and the first optical power loss characteristic value is P2- (10log (R2/R1) + P1) dB; the P2 is the power of one optical signal detected by the detector connected to the R2 branch of the optical splitter, and the P1 is the power of the other optical signal detected by the detector connected to the R1 branch of the optical splitter.

In an alternative embodiment, the splitting the first optical signal into two or more optical signals by the monotonic filtering module includes: and dividing the first optical signal into two or more paths of optical signals after transmission and/or reflection in the monotonic filtering module. That is, the monotonic filter module includes the filter and the transmission and/or reflection paths of the beam splitter.

In an alternative embodiment, the optical power loss characteristic value includes a single loss characteristic value or a group of loss characteristic values, wherein at least one of the optical power loss characteristic values corresponding to the wavelength information of the different optical signals is different.

In an alternative embodiment, when the monotonic filter module includes the monotonic filter and the optical splitter, and the splitting ratio of the optical splitter is 1:1, determining the first optical power loss characteristic value of the first optical signal passing through the monotonic filter module by using the power of the two or more optical signals into which the first optical signal is split includes: determining a difference value of any two optical signals in the powers of the two or more optical signals into which the first optical signal is divided as the first optical power loss characteristic value; or, a group of loss characteristic values formed by a plurality of difference values of two or more optical signals in the two or more optical signals into which the first optical signal is divided is determined as the first optical power loss characteristic value.

In an optional embodiment, in a case that the monotonic filter module includes a monotonic filter and an optical splitter, the monotonic filter module further includes an optical etalon, wherein in a case that the monotonic filter module includes the optical etalon, the first optical power loss characteristic value is an optical power loss value in a predetermined wavelength channel, wherein optical power loss characteristic values corresponding to optical signals in different wavelength channels passing through the monotonic filter module are different; and/or the optical power loss characteristic values corresponding to the optical signals with different wavelengths in the same wavelength channel passing through the monotonic filtering module are the same or different.

In an optional embodiment, after determining a first optical power loss characteristic value of the first optical signal passing through the monotonic filter module by using the power of the two or more optical signals into which the first optical signal is divided, the method further includes: dividing a second optical signal into two or more optical signals through the monotonic filtering module, wherein the second optical signal and the first optical signal come from the same opposite terminal; determining the power of two or more paths of optical signals into which the second optical signal is divided; determining a second optical power loss characteristic value of the second optical signal passing through the monotonic filter module by using the power of the two or more optical signals into which the second optical signal is divided; determining a wavelength offset value of the optical signal transmitted by the opposite terminal according to a difference value between the first optical power loss characteristic value and the second optical power loss characteristic value; and/or determining Loss alarm information of the opposite-end transmitting optical signal according to a variation trend of the power of the two or more optical signals into which the second optical signal is divided relative to the power of the two or more optical signals into which the first optical signal is divided, and a difference value of the first optical power Loss characteristic value and the second optical power Loss characteristic value. The following description is given with reference to specific examples:

detailed description of the preferred embodiment

In the wavelength monitoring method described in the first to sixth embodiments, the wavelength identification module further includes L (λ) monitoring, and the wavelength drift value and Loss alarm of the optical signal transmitted by the opposite end can be obtained by monitoring L (λ) in real time, where fig. 25 is a flowchart of a wavelength information monitoring method according to the seventh embodiment, and includes the following steps:

s2502, the onu (olt) transmits an optical signal with a certain wavelength;

s2504, the olt (onu) obtains the wavelength value of the optical signal emitted by the onu (olt) by the wavelength monitoring method, and monitors the loss characteristic value L (λ) in real time;

s2506, OLT (ONU) obtains information such as Loss alarm and wavelength drift value of ONU (OLT) transmitter according to the Loss characteristic value L (lambda) change of optical signal transmitted by ONU (OLT).

Taking the first embodiment as an example, when L (λ) is decreased, it may be determined that the wavelength of the peer-to-peer transmission signal is red-shifted, when L (λ) is increased, it may be determined that the wavelength of the peer-to-peer transmission signal is blue-shifted, when P1 and P2 are decreased simultaneously, and L (λ) is unchanged, it may be determined that the optical power of the peer-to-peer transmission signal is decreased, and when P1 and P2 are decreased simultaneously below a certain decision threshold, it may be determined that the peer-to-peer transmission signal is Loss.

Taking the second embodiment as an example, when L (λ) is decreased, it may be determined that the wavelength of the peer-to-peer transmission signal is blue-shifted, when L (λ) is increased, it may be determined that the wavelength of the peer-to-peer transmission signal is red-shifted, when P1 and P2 are decreased simultaneously, and L (λ) is unchanged, it may be determined that the optical power of the peer-to-peer transmission signal is decreased, and when P1 and P2 are decreased simultaneously below a certain decision threshold, it may be determined that the peer-to-peer transmission signal is Loss.

Taking the sixth specific embodiment as an example, when L (λ) decreases, it may be determined that the opposite-end transmission signal deviates from the center wavelength, when L (λ) decreases by more than 1 Loss characteristic segment, it may be determined that the opposite-end transmission signal wavelength deviates from one wavelength channel, and when both P1 and P2 decrease by less than a certain decision threshold value, it may be determined that the opposite-end transmission signal Loss.

In an optional embodiment, after determining the wavelength information of the optical signal corresponding to the first optical power loss characteristic value according to the correspondence between the optical power loss characteristic value and the wavelength information of the optical signal, and taking the determined wavelength information of the optical signal as the wavelength information of the first optical signal, the method further includes: tuning a transmission wavelength of a transmitter into a wavelength channel corresponding to wavelength information of the first optical signal. The following description is given with reference to specific examples:

detailed description of the preferred embodiment

In a WDM PON system, after wavelength information of a received optical signal is obtained based on the wavelength monitoring method described in embodiments one to six, a transmitter tunes a transmission wavelength to a corresponding wavelength channel according to a received optical wavelength of an opposite-end signal. Specific methods and devices are shown in fig. 26 and 27. Wherein, the method comprises the following steps:

s2602, olt (onu) transmits an optical signal with a certain wavelength;

s2604, the ONU (OLT) obtains the wavelength value of the optical signal emitted by the OLT (ONU) by the wavelength monitoring method;

and S2606, the ONU (OLT) sets the self-emission optical signal in the corresponding wavelength channel according to the wavelength value of the optical signal emitted by the OLT (ONU).

In an alternative embodiment, the monotonic filter comprises at least one of: the device comprises a thin film filter, a fiber grating filter, a Mach-Zehnder interferometer, a micro-ring resonator, an arrayed waveguide grating, a multimode interference coupler, a directional coupler and an etalon.

In an alternative embodiment, the monotonic filtering module is composed of a single discrete device combination; in an alternative embodiment, the monotonic filtering module is formed by an integrated device; in an alternative embodiment, the monotonic filtering module is integrated with a detector, wherein the detector is configured to determine the power of the two or more optical signals into which the first optical signal is divided by the monotonic filtering module.

In an alternative embodiment, the wavelength information of the optical signal comprises at least one of: a wavelength value of the optical signal, a wavelength channel value of the optical signal.

Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

In this embodiment, a device for determining wavelength information of an optical signal is further provided, where the device is equivalent to the information monitoring device in the above specific embodiment, and the device is used to implement the above embodiments and preferred embodiments, and the description of the device is omitted for brevity. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 28 is an apparatus for determining wavelength information of an optical signal according to an embodiment of the present invention, as shown in fig. 28, including the following modules:

a monotonic filtering module 282 for dividing the first optical signal into two or more optical signals, wherein the monotonic filtering module comprises a monotonic filter, or comprises a monotonic filter and an optical splitter; a power detector 284 (corresponding to the detector 1 … n in fig. 2), connected to the monotonic filtering module 282, for determining the power of the two or more optical signals into which the first optical signal is divided; a first determining module 286, connected to the power detector 284, for determining a first optical power loss characteristic value of the first optical signal passing through the monotonic filter module by using the power of the two or more optical signals into which the first optical signal is divided; a second determining module 288, connected to the first determining module 286, configured to determine the wavelength information of the optical signal corresponding to the first optical power loss characteristic value according to the corresponding relationship between the optical power loss characteristic value and the wavelength information of the optical signal, and use the determined wavelength information of the optical signal as the wavelength information of the first optical signal.

In an alternative embodiment, the monotonic filter comprises a monotonically increasing filter and/or a monotonically decreasing filter.

In an alternative embodiment, the monotonic filter comprises a linear filter.

In an alternative embodiment, when the monotonic filter module includes one monotonic filter, the monotonic filter is disposed on a transmission optical path of the first optical signal, and the monotonic filter divides the first optical signal into two optical signals by transmitting and reflecting the first optical signal.

In an optional embodiment, when the monotonic filtering module includes one monotonic filter and one optical splitter, the optical splitter is disposed on a transmission optical path of the first optical signal, and the optical splitter is configured to split the first optical signal into two optical signals; the monotonic filter is arranged on a transmission light path of one optical signal of the two optical signals which are split into two paths, and the monotonic filter is only used for transmitting the one optical signal; or, the monotonic filter transmits and reflects the one optical signal to divide the one optical signal into two optical signals.

In an optional embodiment, when the monotonic filtering module includes three monotonic filters and three optical splitters, the three monotonic filters are a first monotonic filter, a second monotonic filter and a third monotonic filter, respectively, and the three optical splitters are a first optical splitter, a second optical splitter and a third optical splitter, respectively, where the first optical splitter is disposed on a transmission optical path of the first optical signal, and the first optical splitter is configured to split the first optical signal into a first optical signal and a second optical signal; the second optical splitter is arranged on a transmission optical path of the first optical signal, and is used for splitting the first optical signal into a third optical signal and a fourth optical signal; the third optical splitter is arranged on a transmission light path of the second optical signal, and is used for splitting the second optical signal into a fifth optical signal and a sixth optical signal; the first monotonic filter is arranged on a transmission light path of the fourth optical signal and is used for transmitting the fourth optical signal; the second monotonic filter is arranged on a transmission optical path of the fifth optical signal and is used for transmitting the fifth optical signal; the third monotonic filter is arranged on the transmission optical path of the sixth optical signal and is used for transmitting the sixth optical signal.

In an optional embodiment, when the monotonic filtering module includes two monotonic filters and one optical splitter, the two monotonic filters are a fourth monotonic filter and a fifth monotonic filter, respectively, where the optical splitter is disposed on a transmission optical path of the first optical signal, and the first optical splitter is configured to split the first optical signal into a seventh optical signal and an eighth optical signal; the fourth monotonic filter is arranged on a transmission optical path of the eighth optical signal and is used for dividing the eighth optical signal into a ninth optical signal and a tenth optical signal by reflecting and transmitting the eighth optical signal; the fifth monotonic filter is arranged on the transmission optical path of the tenth optical signal and is used for transmitting the tenth optical signal.

In an alternative embodiment, the power detector comprises a passive optical network, PON, signal receiver.

In an alternative embodiment, when the power detector is the PON signal receiver and the first optical signal is split into two optical signals, the splitter splitting ratio R1: R2 is any value in the interval (0,1), and the first optical power loss characteristic value is P2- (10log (R2/R1) + P1) dB; the P2 is the power of one optical signal detected by the detector connected to the R2 branch of the optical splitter, and the P1 is the power of the other optical signal detected by the detector connected to the R1 branch of the optical splitter.

In an alternative embodiment, the monotonic filtering module 282 is configured to divide the first optical signal into two or more optical signals by: and dividing the first optical signal into two or more paths of optical signals after transmission and/or reflection in the monotonic filtering module.

In an alternative embodiment, when the monotonic filtering module comprises the monotonic filter and the optical splitter, and the splitting ratio of the optical splitter is 1:1, the first determining module 286 is configured to: determining a difference value of any two optical signals in the powers of the two or more optical signals into which the first optical signal is divided as the first optical power loss characteristic value; or, a group of loss characteristic values formed by a plurality of difference values of two or more optical signals in the two or more optical signals into which the first optical signal is divided is determined as the first optical power loss characteristic value.

In an optional embodiment, the apparatus further comprises a monitoring module configured to perform at least one of the following: determining a wavelength offset value of the optical signal transmitted by the opposite terminal according to a difference value between the first optical power loss characteristic value and the second optical power loss characteristic value; determining lost Loss alarm information of the opposite-end transmitting optical signal according to the variation trend of the power of the two or more optical signals into which the second optical signal is divided relative to the power of the two or more optical signals into which the first optical signal is divided and the difference value of the first optical power Loss characteristic value and the second optical power Loss characteristic value; wherein the second optical power loss characteristic value is determined by: after determining a first optical power loss characteristic value of the first optical signal passing through the monotonic filter module by using the power of the two or more optical signals into which the first optical signal is divided, dividing a second optical signal into two or more optical signals through the monotonic filter module, wherein the second optical signal and the first optical signal come from the same opposite terminal; determining the power of two or more paths of optical signals into which the second optical signal is divided; and determining a second optical power loss characteristic value of the second optical signal passing through the monotonic filter module by using the power of the two or more optical signals into which the second optical signal is divided.

In an optional embodiment, the apparatus is further configured to tune the transmission wavelength of the transmitter into a wavelength channel corresponding to the wavelength information of the first optical signal after determining the wavelength information of the optical signal corresponding to the first optical power loss characteristic value according to the correspondence between the optical power loss characteristic value and the wavelength information of the optical signal and taking the determined wavelength information of the optical signal as the wavelength information of the first optical signal.

In an optional embodiment, the wavelength information of the optical signal includes at least one of: a wavelength value of the optical signal, a wavelength channel value of the optical signal.

In an alternative embodiment, the first determining module 286 and the second determining module 288 may be integrated into a wavelength identification module (e.g., the wavelength identification module in fig. 2), or the first determining module 286 and the second determining module 288 may be two relatively independent physical devices.

It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in different processors in any combination.

Embodiments of the present invention also provide a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.

Optionally, in this embodiment, the storage medium may include, but is not limited to: various media capable of storing computer programs, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.

Embodiments of the present invention also provide an electronic device comprising a memory having a computer program stored therein and a processor arranged to run the computer program to perform the steps of any of the above method embodiments.

Optionally, the electronic apparatus may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor, and the input/output device is connected to the processor.

Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method of determining wavelength information of an optical signal, comprising:

dividing the first optical signal into two or more optical signals through a monotonic filtering module, wherein the monotonic filtering module comprises a monotonic filter or a monotonic filter and an optical splitter;

determining the power of two or more paths of optical signals into which the first optical signal is divided;

determining a first optical power loss characteristic value of the first optical signal passing through the monotonic filter module by using the power of the two or more optical signals into which the first optical signal is divided;

and determining the wavelength information of the optical signal corresponding to the first optical power loss characteristic value according to the corresponding relation between the optical power loss characteristic value and the wavelength information of the optical signal, and taking the determined wavelength information of the optical signal as the wavelength information of the first optical signal.

2. The method of claim 1, wherein the monotonic filter comprises a monotonically increasing filter and/or a monotonically decreasing filter.

3. The method of claim 1, wherein the monotonic filter comprises a linear filter.

4. The method of claim 1, wherein when said monotonic filter module comprises one of said monotonic filters,

the monotonic filter is arranged on a transmission optical path of the first optical signal, and the monotonic filter divides the first optical signal into two optical signals by transmitting and reflecting the first optical signal.

5. The method of claim 1, wherein when said monotonic filter module comprises one said monotonic filter and one said optical splitter,

the optical splitter is arranged on a transmission light path of the first optical signal and is used for splitting the first optical signal into two optical signals;

the monotonic filter is arranged on a transmission light path of one optical signal of the two optical signals which are split into two paths, and the monotonic filter is only used for transmitting the one optical signal; or, the monotonic filter transmits and reflects the one optical signal to divide the one optical signal into two optical signals.

6. The method of claim 1, wherein when said monotonic filtering module comprises three said monotonic filters and three said optical splitters, the three said monotonic filters are a first monotonic filter, a second monotonic filter and a third monotonic filter, respectively, and the three said optical splitters are a first optical splitter, a second optical splitter and a third optical splitter, respectively, wherein,

the first optical splitter is arranged on a transmission optical path of the first optical signal, and is used for splitting the first optical signal into a first optical signal and a second optical signal;

the second optical splitter is arranged on a transmission optical path of the first optical signal, and is used for splitting the first optical signal into a third optical signal and a fourth optical signal;

the third optical splitter is arranged on a transmission light path of the second optical signal, and is used for splitting the second optical signal into a fifth optical signal and a sixth optical signal;

the first monotonic filter is arranged on a transmission light path of the fourth optical signal and is used for transmitting the fourth optical signal;

the second monotonic filter is arranged on a transmission optical path of the fifth optical signal and is used for transmitting the fifth optical signal;

the third monotonic filter is arranged on the transmission optical path of the sixth optical signal and is used for transmitting the sixth optical signal.

7. The method of claim 1, wherein when said monotonic filter module comprises two said monotonic filters and one said optical splitter, the two said monotonic filters are a fourth monotonic filter and a fifth monotonic filter, respectively,

the optical splitter is arranged on a transmission optical path of the first optical signal, and is used for splitting the first optical signal into a seventh optical signal and an eighth optical signal;

the fourth monotonic filter is arranged on a transmission optical path of the eighth optical signal and is used for dividing the eighth optical signal into a ninth optical signal and a tenth optical signal by reflecting and transmitting the eighth optical signal;

the fifth monotonic filter is arranged on the transmission optical path of the tenth optical signal and is used for transmitting the tenth optical signal.

8. The method of claim 1, wherein determining the power of the two or more optical signals into which the first optical signal is split comprises:

and determining the power of two or more optical signals into which the first optical signal is divided by the monotonic filtering module by using a detector.

9. The method of claim 8, wherein the detector comprises a Passive Optical Network (PON) signal receiver.

10. The method of claim 9, wherein when the detector is the PON signal receiver and the first optical signal is split into two optical signals,

the splitting ratio R1: R2 of the optical splitter is any value in the interval of (0,1), and the first optical power loss characteristic value is P2- (10log (R2/R1) + P1) dB;

the P2 is the power of one optical signal detected by the detector connected to the R2 branch of the optical splitter, and the P1 is the power of the other optical signal detected by the detector connected to the R1 branch of the optical splitter.

11. The method of claim 1, wherein splitting the first optical signal into two or more optical signals with the monotonic filtering module comprises:

and dividing the first optical signal into two or more paths of optical signals after transmission and/or reflection in the monotonic filtering module.

12. The method of claim 1, wherein the optical power loss characteristic values comprise a single loss characteristic value or a group of loss characteristic values, and wherein at least one of the optical power loss characteristic values corresponding to the wavelength information of the different optical signals is different.

13. The method of claim 1, wherein when the monotonic filter module comprises the monotonic filter and the optical splitter, and the optical splitting ratio of the optical splitter is 1:1, determining the first optical power loss characteristic value of the first optical signal passing through the monotonic filter module by using the power of the two or more optical signals into which the first optical signal is split comprises:

determining a difference value of any two optical signals in the powers of the two or more optical signals into which the first optical signal is divided as the first optical power loss characteristic value; alternatively, the first and second electrodes may be,

and determining a group of loss characteristic values formed by a plurality of difference values of the two or more optical signals into which the first optical signal is divided as the first optical power loss characteristic value.

14. The method of claim 1, wherein the monotonic filter module further comprises an optical etalon in the case that the monotonic filter module comprises a monotonic filter and an optical splitter, wherein the first optical power loss characteristic value is an optical power loss value within a predetermined wavelength channel in the case that the monotonic filter module comprises the optical etalon, wherein,

the corresponding optical power loss characteristic values of optical signals under different wavelength channels passing through the monotonic filtering module are different; and/or the presence of a gas in the gas,

and the corresponding optical power loss characteristic values of the optical signals with different wavelengths in the same wavelength channel passing through the monotonic filtering module are the same or different.

15. The method of claim 1, wherein after determining a first optical power loss characteristic value of the first optical signal through the monotonic filter module using the power of the two or more optical signals into which the first optical signal is divided, the method further comprises:

dividing a second optical signal into two or more optical signals through the monotonic filtering module, wherein the second optical signal and the first optical signal come from the same opposite terminal;

determining the power of two or more paths of optical signals into which the second optical signal is divided;

determining a second optical power loss characteristic value of the second optical signal passing through the monotonic filter module by using the power of the two or more optical signals into which the second optical signal is divided;

determining a wavelength offset value of the optical signal transmitted by the opposite terminal according to a difference value between the first optical power loss characteristic value and the second optical power loss characteristic value; and/or determining Loss alarm information of the opposite-end transmitting optical signal according to a variation trend of the power of the two or more optical signals into which the second optical signal is divided relative to the power of the two or more optical signals into which the first optical signal is divided, and a difference value of the first optical power Loss characteristic value and the second optical power Loss characteristic value.

16. The method according to claim 1, wherein after determining the wavelength information of the optical signal corresponding to the first optical power loss characteristic value according to the correspondence relationship between the optical power loss characteristic value and the wavelength information of the optical signal, and using the determined wavelength information of the optical signal as the wavelength information of the first optical signal, the method further comprises:

tuning a transmission wavelength of a transmitter into a wavelength channel corresponding to wavelength information of the first optical signal.

17. The method of claim 1, wherein the monotonic filter comprises at least one of:

the device comprises a thin film filter, a fiber grating filter, a Mach-Zehnder interferometer, a micro-ring resonator, an arrayed waveguide grating, a multimode interference coupler, a directional coupler and an etalon.

18. The method of claim 1, comprising at least one of:

the monotone filtering module is formed by combining single discrete devices;

the monotone filtering module is composed of integrated devices;

the monotonic filtering module is integrated with a detector, wherein the detector is used for determining the power of two or more optical signals into which the first optical signal is divided by the monotonic filtering module.

19. The method of claim 1, wherein the wavelength information of the optical signal comprises at least one of:

a wavelength value of the optical signal, a wavelength channel value of the optical signal.

20. An apparatus for determining wavelength information of an optical signal, comprising:

the monotonic filtering module is used for dividing the first optical signal into two or more optical signals, wherein the monotonic filtering module comprises a monotonic filter or comprises a monotonic filter and an optical splitter;

the power detector is used for determining the power of the two or more paths of optical signals into which the first optical signal is divided;

a first determining module, configured to determine a first optical power loss characteristic value of the first optical signal passing through the monotonic filtering module by using power of two or more optical signals into which the first optical signal is divided;

and the second determining module is used for determining the wavelength information of the optical signal corresponding to the first optical power loss characteristic value according to the corresponding relation between the optical power loss characteristic value and the wavelength information of the optical signal, and taking the determined wavelength information of the optical signal as the wavelength information of the first optical signal.

21. The apparatus of claim 20, wherein the monotonic filter comprises a monotonically increasing filter and/or a monotonically decreasing filter.

22. The apparatus of claim 20, wherein the monotonic filter comprises a linear filter.

23. The apparatus of claim 20 wherein when said monotonic filtering module comprises one of said monotonic filters,

24. The apparatus of claim 20 wherein when said monotonic filter module comprises one of said monotonic filter and one of said optical splitters,

25. The apparatus of claim 20, wherein when said monotonic filtering module comprises three said monotonic filters and three said optical splitters, the three said monotonic filters are a first monotonic filter, a second monotonic filter and a third monotonic filter, respectively, and the three said optical splitters are a first optical splitter, a second optical splitter and a third optical splitter, respectively, wherein,

26. The apparatus of claim 20, wherein when said monotonic filtering module comprises two of said monotonic filters and one of said optical splitters, the two of said monotonic filters are a fourth monotonic filter and a fifth monotonic filter, respectively,

27. The apparatus of claim 20, wherein the power detector comprises a Passive Optical Network (PON) signal receiver.

28. The apparatus of claim 27, wherein when the power detector is the PON signal receiver and the first optical signal is split into two optical signals,

29. The apparatus of claim 20, wherein the monotonic filtering module is configured to split the first optical signal into two or more optical signals by:

30. The apparatus of claim 20, wherein the optical power loss characteristic values comprise a single loss characteristic value or a group of loss characteristic values, and wherein at least one of the optical power loss characteristic values corresponding to wavelength information of different optical signals is different.

31. The apparatus according to claim 20, wherein when the monotonic filter module comprises the monotonic filter and the beam splitter, and the beam splitter has a splitting ratio of 1:1, the first determining module is configured to:

32. The apparatus of claim 20, wherein the monotonic filter module further comprises an optical etalon in the case that the monotonic filter module comprises a monotonic filter and an optical splitter, wherein the first optical power loss characteristic value is an optical power loss value within a predetermined wavelength channel in the case that the monotonic filter module comprises the optical etalon, wherein,

33. The apparatus of claim 20, further comprising a monitoring module, wherein the monitoring module is configured to perform at least one of:

determining a wavelength offset value of the optical signal transmitted by the opposite terminal according to the difference value between the first optical power loss characteristic value and the second optical power loss characteristic value;

determining lost Loss alarm information of the opposite-end transmitting optical signal according to the variation trend of the power of the two or more optical signals into which the second optical signal is divided relative to the power of the two or more optical signals into which the first optical signal is divided and the difference value of the first optical power Loss characteristic value and the second optical power Loss characteristic value;

wherein the second optical power loss characteristic value is determined by: after determining a first optical power loss characteristic value of the first optical signal passing through the monotonic filter module by using the power of the two or more optical signals into which the first optical signal is divided, dividing a second optical signal into two or more optical signals through the monotonic filter module, wherein the second optical signal and the first optical signal come from the same opposite terminal; determining the power of two or more paths of optical signals into which the second optical signal is divided; and determining a second optical power loss characteristic value of the second optical signal passing through the monotonic filter module by using the power of the two or more optical signals into which the second optical signal is divided.

34. The apparatus of claim 20, wherein the apparatus is further configured to:

and after determining the wavelength information of the optical signal corresponding to the first optical power loss characteristic value according to the corresponding relation between the optical power loss characteristic value and the wavelength information of the optical signal, and taking the determined wavelength information of the optical signal as the wavelength information of the first optical signal, tuning the transmission wavelength of the transmitter into a wavelength channel corresponding to the wavelength information of the first optical signal.

35. The apparatus of claim 20, wherein the monotonic filter comprises at least one of:

36. The apparatus of claim 20, comprising at least one of:

the monotone filtering module is formed by combining single discrete devices;

the monotone filtering module is composed of integrated devices;

37. The apparatus of claim 20, wherein the wavelength information of the optical signal comprises at least one of:

38. The apparatus of claim 20, wherein the first determining module and the second determining module are integrated in a wavelength identification module.

39. A storage medium, in which a computer program is stored, wherein the computer program is arranged to perform the method of any of claims 1 to 19 when executed.

40. An electronic device comprising a memory and a processor, wherein the memory has stored therein a computer program, and wherein the processor is arranged to execute the computer program to perform the method of any of claims 1 to 19.