WO2018035865A1 - 一种用于波长选择开关wss的信号监控方法及装置 - Google Patents

一种用于波长选择开关wss的信号监控方法及装置 Download PDF

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WO2018035865A1
WO2018035865A1 PCT/CN2016/097000 CN2016097000W WO2018035865A1 WO 2018035865 A1 WO2018035865 A1 WO 2018035865A1 CN 2016097000 W CN2016097000 W CN 2016097000W WO 2018035865 A1 WO2018035865 A1 WO 2018035865A1
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Prior art keywords
optical engine
signal
output
monitoring
input
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PCT/CN2016/097000
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English (en)
French (fr)
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WO2018035865A9 (zh
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宗良佳
赵晗
冯志勇
闫云飞
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华为技术有限公司
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Priority to EP16913886.4A priority Critical patent/EP3499288A4/en
Priority to PCT/CN2016/097000 priority patent/WO2018035865A1/zh
Priority to CN201680082908.9A priority patent/CN108700735B/zh
Publication of WO2018035865A1 publication Critical patent/WO2018035865A1/zh
Publication of WO2018035865A9 publication Critical patent/WO2018035865A9/zh
Priority to US16/285,022 priority patent/US10666375B2/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/06—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the phase of light
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0201—Add-and-drop multiplexing
    • H04J14/0202—Arrangements therefor
    • H04J14/021—Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM]
    • H04J14/0212—Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM] using optical switches or wavelength selective switches [WSS]
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
    • G02B6/2938—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/35—Optical coupling means having switching means
    • G02B6/354—Switching arrangements, i.e. number of input/output ports and interconnection types
    • G02B6/356—Switching arrangements, i.e. number of input/output ports and interconnection types in an optical cross-connect device, e.g. routing and switching aspects of interconnecting different paths propagating different wavelengths to (re)configure the various input and output links
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/35—Optical coupling means having switching means
    • G02B6/3586—Control or adjustment details, e.g. calibrating
    • G02B6/3588—Control or adjustment details, e.g. calibrating of the processed beams, i.e. controlling during switching of orientation, alignment, or beam propagation properties such as intensity, size or shape
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005—Switch and router aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
    • G02B6/29305—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide
    • G02B6/29311—Diffractive element operating in transmission
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/35—Optical coupling means having switching means
    • G02B6/354—Switching arrangements, i.e. number of input/output ports and interconnection types
    • G02B6/3554—3D constellations, i.e. with switching elements and switched beams located in a volume
    • G02B6/3558—1xN switch, i.e. one input and a selectable single output of N possible outputs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005—Switch and router aspects
    • H04Q2011/0007—Construction
    • H04Q2011/0015—Construction using splitting combining
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005—Switch and router aspects
    • H04Q2011/0007—Construction
    • H04Q2011/0016—Construction using wavelength multiplexing or demultiplexing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0079—Operation or maintenance aspects
    • H04Q2011/0083—Testing; Monitoring

Definitions

  • the present invention relates to the field of network communication technologies, and in particular, to a signal monitoring method and apparatus for a wavelength selective switch WSS.
  • ROADM Reconfigurable Optical Add-Drop Multiplexer
  • optical power monitoring can reflect the basic working state of the channel and guide the system to perform automatic power balancing.
  • the optical signal noise ratio (OSNR) monitoring can accurately reflect the signal quality and dispersion.
  • Monitoring can reflect the dispersion state of the channel to direct the system to perform dispersion compensation at the optical or electrical layer.
  • the Wavelength Selective Switch is a technology choice for current ROADMs.
  • 1 refers to the public (COM) port and N represents the branch port.
  • the operation of the WSS is that when a set of Wavelength Division Multiplexing (WDM) signals enters from the COM port, the set of WDM signals are separated according to the optical wavelength, and then each wavelength is routed to the N branch ports according to system requirements.
  • WDM Wavelength Division Multiplexing
  • One branch port Conversely, an optical signal can be received from the N branch ports as an input and sent from the COM port as an output.
  • the prior art proposes a signal monitoring scheme based on LCoS-WSS, in which a single spot on a liquid crystal on silicon (LCoS) is divided into a light monitoring area and a WSS signal switching area, respectively: for example: A spot occupies a total of 200 pixels in the direction of the output port, and 20 of them can be defined as a light monitoring area, and the other 180 are defined as WSS signal switching areas.
  • LCoS-WSS liquid crystal on silicon
  • the monitoring light when the monitoring light is processed, it is also necessary to continuously update the phase information on the LCoS, so that different wavelength channels can be filtered out for detection and monitoring.
  • the LCoS scan update speed is usually around 100ms. If you want to scan 80 channels of the C-band, it takes about 10s, and for multi-port N ⁇ M WSS devices, the time will be longer and it will not meet the future network. The requirements for fast fault location.
  • the present invention provides a signal monitoring method and apparatus for a wavelength selective switch WSS.
  • the method and apparatus provided by the present invention solve the prior art optical signal monitoring scheme, which is time consuming and cannot meet the rapid fault location requirements of the future network. The problem.
  • a signal monitoring method for a wavelength selective switch WSS is provided. After a WDM signal sent from an input port of a WSS passes through an incident grating, light of each wavelength included in the WDM signal is incident on a first optical engine. Different location areas; including:
  • the WDM signal is split into a transmission signal and a monitoring signal by the first optical engine, and output at different output angles in an output port direction.
  • the monitoring signal is input to a second optical engine disposed at the output side grating; and the energy of the transmitted signal is greater than the monitoring signal;
  • the monitor light is output from the second optical engine at a preset angle.
  • a second stage optical engine is also added, which is disposed at the output side grating of the WSS.
  • encoding the phase of the first optical engine according to the WDM signal includes:
  • C 1 : C 2 is the energy ratio of the transmission signal and the monitoring signal, the function And function Corresponding to the output directions of the transmission signal and the monitoring signal, respectively.
  • the phase of the first optical engine is encoded using the above formula, and the first optical engine performs phase adjustment to process the entire spot of the WDM signal without dividing the spot into two parts.
  • the WDM signal can be spectrally processed at an arbitrary ratio while ensuring minimal impact on the insertion loss of the original signal.
  • the monitoring signal is input to the second optical engine disposed at the output side grating, and further includes:
  • the wavelength selective switch WSS includes a plurality of input ports
  • the monitoring light includes signal light of the same wavelength included in a plurality of WDM signals input from the plurality of input ports
  • the monitoring signal is input to the second optical engine disposed at the output side grating, including
  • the four optical engine rotates in the plane of the port such that the monitor signal light is output from the fourth optical engine and input to a predetermined output port.
  • the above two implementations are directed to the case where there are multiple inputs of the WSS, because there are multiple inputs that require the input port and wavelength to be detected, and the above two implementations can utilize the wavelength of the second optical engine.
  • the rotation of the plane can select the light of a specific wavelength to be finally output, so that the phase information on the first optical engine can be refreshed when the monitoring signal is scanned, and the processing speed of the signal monitoring is improved.
  • a wavelength selective switch WSS comprising: an input port, an incident grating, an input spherical mirror, a first optical engine, an output spherical mirror, an output side grating, and a plurality of output ports, wherein the input port For transmitting an input WDM signal to the incident grating;
  • the incident grating is configured to output each wavelength signal in the received WDM signal to the input spherical mirror at different diffraction angles;
  • the input end spherical mirror is configured to inject the respective wavelength signals into different position areas of the first optical engine in parallel;
  • the first optical engine is configured to perform phase-coded modulation according to an input port corresponding to each wavelength signal, and output the wavelength signals to the output spherical mirror at different angles;
  • the output end spherical mirror is configured to output the wavelength signals to the output grating
  • the output grating is configured to output the wavelength signals from different output ports
  • the WSS further includes a second optical engine disposed at the output side grating: wherein
  • the first optical engine is configured to split any one of the wavelength signals into a transmission signal and a monitoring signal, and output the transmission signal and the monitoring signal at different output angles in an output port direction;
  • the monitoring signal is input to the second optical engine;
  • the second optical engine is configured to determine, from the monitoring signal, a set wave that needs to be monitored currently Long monitoring light, and according to an incident angle of the monitoring light incident on the second optical engine and an output angle of the monitoring light outputting the second optical engine, the second optical engine is in the WDM signal Rotation in the wavelength plane causes the monitor light to be output from the second optical engine at a predetermined angle.
  • the WSS further includes:
  • a third optical engine disposed between the first optical engine and the second optical engine; configured to be incident on the third optical engine according to a first monitoring signal corresponding to the monitoring light
  • An angle of incidence of the third optical engine rotating in a port plane such that the first monitor signal is output from the third optical engine to the second optical engine and output from the second optical engine
  • the monitor light is input to a preset output port.
  • the WSS when the input port includes multiple, and the monitoring light includes signal light of the same wavelength included in a plurality of WDM signals input from the plurality of input ports, the WSS further include:
  • a fourth optical engine disposed between the output spherical mirror and the output port; configured to rotate in a port plane according to an incident angle of the monitoring signal light incident on the fourth optical engine, such that the monitoring signal light And outputting to a preset output port; wherein the monitoring signal light is input by the second input port to be monitored in the monitoring light.
  • an apparatus for signal monitoring of a wavelength selective switch WSS comprising a WSS and a processor, the WSS specifically comprising an input port, an incident grating, an input spherical mirror, a first optical engine, and an output spherical mirror And an output side grating and an output port, the WSS further comprising a second optical engine disposed at the output side grating, wherein the second optical engine is configured to screen the monitor light of the set wavelength to be detected;
  • the processor is configured to encode a phase of the first optical engine according to a WDM signal sent by the input port, so that the WDM signal is split by the first optical engine Transmitting a signal and a monitoring signal, and outputting at different output angles in an output port direction; the monitoring signal is input to the second optical engine; and the energy of the transmitted signal is greater than the monitoring signal; determining that the monitoring is currently required from the monitoring signal Setting a monitor light of a wavelength, and controlling the second optical engine according to an incident angle of the monitor light incident to the second optical engine and an exit angle of the monitor light outputting the second optical engine
  • the wavelength of the WDM signal is rotated in a plane such that the monitor light is output from the second optical engine at the exit angle.
  • the processor is further configured to pass a formula:
  • C 1 : C 2 is an energy ratio of the transmission signal to a monitoring signal, the function And function Corresponding to the output directions of the transmission signal and the monitoring signal, respectively.
  • the WSS when the WSS includes multiple input ports, and the WSS further includes a third optical engine, the third optical engine is disposed on the first optical engine and the second Between the optical engines, including:
  • the processor is further configured to control the monitoring signal to be input to a second optical engine disposed at the output side grating, and control the monitoring signal to pass through a third optical engine; determine the monitoring from the plurality of input ports Corresponding to the first input port of the light; determining, by the first input port, the first transmission signal and the first monitoring signal formed by the first optical engine after the WDM signal is split; according to the first monitoring signal An incident angle incident on the third optical engine, controlling the third optical engine to rotate in a port plane such that the first monitor signal is output from the third optical engine to the second optical engine, and The monitor light output from the second optical engine is input to a preset output port.
  • the monitoring light when the WSS includes multiple input ports, and the monitoring light includes a letter of the same wavelength included in multiple WDM signals input from the multiple input ports
  • the light source further includes a fourth optical engine disposed between the output spherical mirror and the output port;
  • the processor controls the monitoring signal to be input to the second optical engine disposed at the output side grating, and is further configured to control the monitoring light to pass through the fourth optical engine; determine a to-be-monitored from the plurality of input ports a second input port, determining, by the monitoring light, the monitoring signal light input by the second input port; controlling the fourth optical engine according to an incident angle of the monitoring signal light incident on the fourth optical engine Rotating in the port plane causes the monitor signal light to be output from the fourth optical engine and input to a preset output port.
  • a second-stage optical engine is further added, and the optical engine is disposed at the output side grating of the WSS.
  • 1a is a schematic flowchart of a signal monitoring method for a wavelength selective switch WSS according to an embodiment of the present invention
  • FIG. 1b is a diagram showing a splitting effect of phase encoding of a first optical engine by using a specific composite phase according to an embodiment of the present invention
  • Figure 1c shows the function in the composite phase And function Schematic diagram of phase change
  • 2a is a schematic diagram of a basic optical path principle of a 1 ⁇ N WSS structure in the prior art
  • 2b is a schematic diagram of a basic optical path principle of a 1 ⁇ N WSS structure which is practically provided by the method of the present invention
  • 2c is a schematic diagram of splitting of a first optical engine in the method of the present invention.
  • 3a is a schematic diagram of a basic optical path principle of an N ⁇ M WSS structure in the prior art
  • FIG. 3b is a schematic diagram of a basic optical path principle of an N ⁇ M WSS structure according to an embodiment of the present invention
  • 3c is a schematic diagram of positions of respective spots in the first optical engine and the third optical engine in the method provided by the embodiment of the present invention
  • FIG. 4 is a schematic diagram of a basic optical path principle of another N ⁇ M WSS structure which is practical for providing the method of the present invention
  • FIG. 5 is a schematic structural diagram of a wavelength selective switch according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of an apparatus for signal monitoring of a wavelength selective switch according to an embodiment of the present invention.
  • an embodiment of the present invention provides a signal monitoring method for a wavelength selective switch WSS.
  • a Wavelength Division Multiplexing (WDM) signal sent from an input port of a WSS passes through an incident grating. Afterwards, the light of each wavelength included in the WDM signal is incident on a different location area of the first optical engine; the method specifically includes:
  • Step 101 encode a phase of the first optical engine according to the WDM signal, so that Passing the WDM signal through the first optical engine, splitting into a transmission signal and a monitoring signal, and outputting at different output angles in an output port direction; wherein the monitoring signal is input to a grating disposed at an output side grating a second optical engine; and the energy of the transmitted signal is greater than the monitoring signal;
  • the spot energy corresponding to a certain wavelength can be split into two parts (respectively corresponding transmission).
  • the signal portion and the monitoring signal portion are respectively output, wherein a large part of the energy is concentrated in the output direction of the signal itself (ie, the transmission signal portion), and the other small portion of the energy direction is the monitoring port output direction (ie, the monitoring signal portion);
  • the division of the supervisory signal minimizes the effects of signal transmission.
  • Step 102 Determine, from the monitoring signal, monitoring light of a set wavelength that needs to be monitored currently;
  • Step 103 controlling the second optical engine to be in a wavelength plane of the WDM signal according to an incident angle of the monitoring light incident on the second optical engine and an output angle of the monitoring light outputting the second optical engine
  • the inner rotation is such that the monitor light is output from the second optical engine at a preset angle.
  • the wavelength plane refers to a plane in which the signal light of different wavelengths included in the WDM signal is spread at different angles after the WDM signal passes through the incident grating.
  • a second stage optical engine (which may be a single MEMS micromirror) is also added, and the stage optical engine is disposed at the output side grating of the WSS.
  • the monitoring light corresponding to the different wavelengths can be output in time division.
  • the specific wavelength of the final output light can be selected, so that it is possible to scan the monitoring signal without refreshing the phase information on the first optical engine, only in the Fast signal monitoring is achieved by rapidly rotating the second stage engine in the wavelength direction.
  • the entire spot of the WDM signal is processed without dividing the spot into two parts.
  • the WDM signal can be spectrally processed at an arbitrary ratio while ensuring minimal impact on the insertion loss of the original signal.
  • the specific implementation manner of encoding the phase of the first optical engine according to the WDM signal may be:
  • C 1 : C 2 is the energy ratio of the transmission signal and the monitoring signal, the function And function Corresponding to the output direction of the transmission signal and the monitoring signal respectively; if the WDM signal passes through the first optical engine, it is subjected to a phase function After the energy ratio is applied, the first part of the WDM signal is output as a transmission signal from the first direction; if the WDM signal passes through the first optical engine, the phase function is obtained. After the energy ratio is applied, the second portion of the WDM signal except the first portion is output as a monitor signal from the second direction without spectrometry; and the first direction is different from the second direction.
  • the WSS has N output ports. If the first to N-1 output ports are set to output a transmission signal, the Nth port is used to output a monitoring signal; The output direction of the corresponding transmission signal is the direction of the first to N-1 output ports; The output direction of the corresponding monitoring signal is the direction of the Nth output port.
  • WSS includes a plurality of implementation structures generally including: (1) a WSS includes an input port and a plurality of output ports, that is, single input and multiple output (1 ⁇ N WSS); (2) one WSS The method includes multiple input ports and multiple output ports, that is, multiple input and multiple output (N ⁇ M WSS).
  • the specific implementation may be:
  • FIG. 2a A schematic diagram of a basic optical path of a 1 ⁇ N WSS structure in the prior art is shown in FIG. 2a, in which a WDM signal (which includes a plurality of signals of different wavelengths, that is, a multi-wavelength signal) passes through an optical fiber array (including a collimating lens).
  • a WDM signal which includes a plurality of signals of different wavelengths, that is, a multi-wavelength signal
  • an optical fiber array including a collimating lens
  • the incident grating Entering the incident grating, the incident grating emits the multi-wavelength signals at different diffraction angles; after passing through the spherical mirror, the signals in the multi-wavelength signal are parallelly incident on different positions of the switching engine LCoS (ie, the first optical engine in the first embodiment); Then, according to the exit ports of different wavelength signals, phase modulation and modulation are performed on the LCoS, and light of different wavelengths is output at different angles; then each wavelength sequentially passes through the spherical mirror and the output side grating, and signals are output from different exit ports.
  • LCoS the switching engine in the first embodiment
  • a second optical engine is added to the original 1 ⁇ N WSS structure, and the structure of the 1 ⁇ N WSS structure of the embodiment of the present invention is as shown in FIG. 2b, and the implementation of the present invention is implemented.
  • the signal processing method in the method provided by the example is the same as the prior art before the optical engine and after the second optical engine.
  • the processing in the first optical engine, the second optical engine, and between may be:
  • the first optical engine may be LCoS
  • the phase energy corresponding to a certain wavelength is split into two parts by phase processing on the LCoS, one of which is respectively outputted. Most of the energy is concentrated in the output direction of the signal itself, and the other part of the energy is directed to the output direction of the monitoring port (as shown in Figure 2c).
  • the transmission signal and the monitoring signal outputted from the first optical engine are input to the exit grating through the spherical mirror, and the monitoring signal is input to the added second optical engine, so that the second optical engine selects the current monitoring signal from the monitoring signal.
  • Monitor light at a specific wavelength.
  • the N ⁇ M WSS structure further includes two types: the first type, N ⁇ M WSS (the specific structure is as shown in FIG. The effect of 3a) is that the optical signal of any one of the output ports can come from any one of the input ports, or a mixture of signals from multiple input ports; the second, N ⁇ M WSS structure has N inputs and M Outputs, where the output signals of the M output ports can only come from one of the N ports.
  • N ⁇ M WSS the first type
  • N ⁇ M WSS the specific structure is as shown in FIG.
  • the effect of 3a is that the optical signal of any one of the output ports can come from any one of the input ports, or a mixture of signals from multiple input ports
  • the second, N ⁇ M WSS structure has N inputs and M Outputs, where the output signals of the M output ports can only come from one of the N ports.
  • the method provided by the embodiment of the present invention includes a first optical engine, a second optical engine, and a third optical engine (as shown in FIG. 3b), wherein the multi-wavelength signal corresponding to the plurality of input ports
  • the specific implementation may be: before the monitoring signal is input to the second optical engine disposed at the output side grating, the method further includes:
  • A1 controlling the monitoring signal to pass through a third optical engine; wherein the third optical engine is disposed between the first optical engine and the second optical engine;
  • A2 determining, from a plurality of input ports, a first input port corresponding to the monitoring light
  • the method of this embodiment is applied to a WSS structure including a plurality of input ports, it is necessary to determine which one of the input ports corresponds to the signal at a certain time, and it is necessary to determine the first input corresponding to the final output of the monitor light. port.
  • A3 determining, by the first input port, that the sent WDM signal is split by the first optical engine to form a first transmission signal and a first monitoring signal;
  • A4 Control the third optical engine to rotate in a port plane according to an incident angle of the first monitoring signal incident on the third optical engine, so that the first monitoring signal is output from the third optical engine to The second optical engine and causes the monitor light output from the second optical engine to be input to a preset output port.
  • the final effect of the third optical engine rotating in the port plane is to: filter the first monitoring signal from the monitoring signals from the plurality of input ports, and ensure that the first monitoring signal passes through the second optical engine.
  • the output of the monitor light in the port plane corresponds to the output port, so when controlling the third optical engine to rotate in the port plane, it is necessary to refer to the incident angle of the first monitor signal and the position of the output port of the final monitor light; In order to ensure that the monitoring light that needs to be monitored is output from a specific output port at a specific time.
  • a multi-port WSS device requires a two-stage optical engine (such as the first optical engine and the third optical engine shown in FIG. 3a), a device corresponding to N input ports, first with respect to the 1 ⁇ N WSS structure.
  • the optical switching engine will contain N rows of spots, each of which spreads in the wavelength direction. Any wavelength of any one of the input ports can be mapped to the third optical switching engine by switching of the first optical engine, and the third optical engine is used to switch signals (light path deflection) mapped to a certain area of the engine. Thereby coupled to a preset output port for output.
  • the N ⁇ M WSS structure provided by the embodiment of the present invention is as shown in FIG. 3b.
  • the WDM light entering from the N input ports passes through a collimating mirror array, a grating, a lens, and the like, and is arranged in the wavelength direction to be N-line transmitted to On the first optical engine.
  • the splitting operation is then performed by a phase algorithm for each of the wavelength signals in each of the spots on the first optical engine.
  • the incident wavelength signals are divided into two parts according to a predetermined splitting ratio: one part is a transmission signal and the other part is a monitoring signal.
  • the direction of the transmission signal is determined by the output end corresponding to the transmission signal.
  • the certain wavelength signal needs to be output from the second output port, that is, the phase control of the first optical engine is performed, so that the certain wavelength signal is mapped to the first The position of the second output port of the three optical engine. Because the supervisory signals are all output through the same output port, all supervisory signals are mapped to specific locations on the third optical engine. And the direction of the monitoring signal corresponding to each input port is determined by the corresponding spot position of the monitoring light output port on the third optical engine.
  • the monitoring signals corresponding to the input ports are mapped to the same specific position area of the third optical engine, the incident angles on the port plane are different, so when the third optical engine is controlled to rotate in the port plane, the output can be selected.
  • the third optical engine determines the monitoring signal of the certain injection port
  • the monitoring signal is mapped to the second optical engine, and the second optical engine disposed at the output side grating rotates in the wavelength direction to select a certain wavelength for monitoring. Light output.
  • the position of each spot on the first optical engine and the third optical engine is as shown in Figure 3c.
  • the first optical engine will contain N rows of spots corresponding to the WDM signals of the N input ports;
  • the third optical engine will contain (M+ 1) A line spot, where M corresponds to the optical signals of the M output ports, and the other line corresponds to the monitoring signals from 1 to N input ports. It can be seen from the figure that for a certain optical wavelength channel ⁇ k , its spot corresponds to a monitoring signal (different incident angle) from N input ports.
  • the method provided by the embodiment of the present invention is applicable to the WSS structure shown in FIG. 4, where the WSS structure includes a first optical engine, a second optical engine, and a fourth Optical engine.
  • the first optical engine splits the WDM signal into two parts
  • the monitoring signals corresponding to the respective input port ports are input to a specific position of the second optical engine, and for the second optical engine, only the specific wavelength of the monitoring light can be Outputting, but the monitoring light of the specific wavelength is signal light including the same wavelength of the plurality of input ports; for example, to detect red light input by the first input port, the monitoring light output by the second optical engine is included Red light in the WDM signal input to all input ports; in order to monitor the specific wavelength monitoring light of a particular port, it is further necessary to select one of the monitoring lights output from the second optical engine.
  • the specific selection of the monitoring light of a specific wavelength is implemented by the fourth optical engine, and the specific implementation may be:
  • the fourth optical engine Since in the existing WSS structure, the output side grating is before the fourth optical engine, and the optical signal after the optical multiplexed signal output from the first optical engine is mapped to the fourth optical engine, the fourth optical engine functions to select the output from Which input port multiplexed signal can not be selected separately for each wavelength, so based on the second optical engine newly added to the output side grating in the solution of the present invention, the selection of the signal wavelength can be realized, and the specific structure is shown in FIG. 4 . Shown. The specific implementation of the method can be:
  • the N ⁇ M WSS structure provided by the embodiment of the present invention is as shown in FIG. 4, and the WDM light entering from the N input ports passes through a collimating mirror array, a grating, a lens, and the like, and is arranged in the wavelength direction to be N-line transmitted to On the first optical engine. Then for each of the spots in the first optical engine The wavelength signals are split by the phase algorithm.
  • the incident wavelength signals are divided into two parts according to a predetermined splitting ratio: one part is a transmission signal and the other part is a monitoring signal.
  • the direction of the transmission signal is determined by the output end corresponding to the transmission signal, and the phase control of the first optical engine is such that the monitoring signals of the respective input ports are mapped to the positions corresponding to the monitoring light output ports of the second optical engine.
  • the second optical engine rotating in the wavelength plane filters the monitoring light of the specific wavelength in each monitoring signal and maps to the fourth optical engine. Specific location.
  • the specific wavelength monitoring light corresponding to each input port is mapped to a specific position of the fourth optical engine, when the fourth optical engine is controlled to rotate in the port plane, the monitoring light of a specific wavelength from which input port is output can be selected.
  • the signal light to be monitored is selected by adding a primary optical engine based on the original WSS structure, thereby effectively improving the fault monitoring speed of the WSS structure.
  • the entire spot of the WDM signal is processed without dividing the spot into two parts.
  • the WDM signal can be spectrally processed at an arbitrary ratio while ensuring minimal impact on the insertion loss of the original signal.
  • an embodiment of the present invention provides a wavelength selective switch WSS, which includes an input port 501, an incident grating 502, an input spherical mirror 503, a first optical engine 504, an output spherical mirror 505, and an output side grating 506. And output port 507, where:
  • the input port 501 is configured to send the input WDM signal to the incident grating
  • An incident grating 502 configured to respectively use different wavelength signals in the received WDM signal a diffraction angle is emitted to the input spherical mirror;
  • the input end spherical mirror 503 is configured to inject the respective wavelength signals into different position areas of the first optical engine in parallel;
  • a first optical engine 504 configured to perform phase-coded modulation according to an input port corresponding to each wavelength signal, and output the wavelength signals to the output spherical mirror at different angles;
  • the WSS further includes a second optical engine 508 disposed at the output side grating 506; based on the structure in which the second optical engine 508 is disposed, wherein:
  • the first optical engine 504 is further configured to split any one of the wavelength signals into a transmission signal and a monitoring signal, and output the transmission signal and the monitoring signal at different output angles in an output port direction;
  • the monitoring signal is input to the second optical engine 508;
  • the second optical engine 508 configured to determine, from the monitoring signal, the monitoring light of the set wavelength that is currently to be monitored, and according to the incident angle of the monitoring light incident on the second optical engine 508 and the The monitor light outputs an exit angle of the second optical engine 508 to rotate in a wavelength plane of the WDM signal such that the monitor light is output from the second optical engine at a predetermined angle.
  • the WSS includes a plurality of implementation structures generally including: one input signal corresponding to multiple output signals, that is, single input and multiple output (1 ⁇ N WSS); or, multiple input signals corresponding to multiple output signals, ie, Multiple implementations of N ⁇ M WSS, for WSS structures including multiple input ports, the specific implementation is different, the specific implementation is as follows:
  • N ⁇ M WSS the optical signal of any one of the output ports can come from any one of the input ports, or a mixture of signals from multiple input ports, then the wavelength selection switch WSS Included (structure shown in Figure 3b):
  • a third optical engine the third optical engine being disposed between the first optical engine and the second optical engine; configured to determine a first monitoring signal from monitoring light corresponding to the plurality of input ports; An angle of incidence of the first monitor signal to the third optical engine, the third optical engine rotating in a port plane such that the first monitor signal is output from the third optical engine to the second optical engine And causing the monitor light output from the second optical engine to be input to a preset output port.
  • the N ⁇ M WSS structure has N input terminals and M output terminals, wherein the output signals of the M output ports can only come from one of the N ports, then the wavelength selection switch WSS is included (the structure is as shown in FIG. 4 Show):
  • a fourth optical engine disposed between the output spherical mirror and the output port; configured to rotate in a port plane according to an incident angle of the monitoring signal light incident on the fourth optical engine, such that the monitoring signal light And outputting to a preset output port; wherein the monitoring signal light is input by the second input port to be monitored in the monitoring light.
  • the embodiment of the present invention further provides a device for signal monitoring of a wavelength selective switch (WSS), the device includes a wavelength selection switch 601 and a processor 602, wherein the wavelength selection switch 601 specifically includes: an input port. An incident grating, an input spherical mirror, a first optical engine, an output spherical mirror, an output side grating, and an output port, wherein the WSS further includes a second optical engine disposed at the output side grating, the second optical engine being used Filtering the monitor light of the set wavelength to be detected;
  • WSS wavelength selective switch
  • the processor 602 is configured to encode a phase of the first optical engine according to a WDM signal sent by the input port, so that the WDM signal is split into a transmission signal and a monitoring signal by using the first optical engine. And output at different output angles in the direction of the output port;
  • the control signal is input to the second optical engine; and the energy of the transmitted signal is greater than the monitoring signal;
  • the monitoring light of the set wavelength that needs to be monitored currently is determined from the monitoring signal, and is incident on the second according to the monitoring light
  • An angle of incidence of the optical engine and an exit angle of the monitor light outputting the second optical engine to control the second optical engine to rotate in a wavelength plane of the WDM signal such that the monitor light follows the exit angle
  • the second optical engine outputs.
  • processor 602 is further configured to:
  • C 1 : C 2 is an energy ratio of the transmission signal to a monitoring signal, the function And function Corresponding to the output directions of the transmission signal and the monitoring signal, respectively.
  • the N ⁇ M WSS structure specifically includes two types: the first type, and the N ⁇ M WSS function is: any one output.
  • the optical signal of the port can come from any input port or a mixture of signals from multiple input ports; the second, N ⁇ M WSS structure has N inputs and M outputs, of which the outputs of the M output ports The signal can only come from one of the N ports.
  • the device provided in this embodiment may be specifically:
  • the WSS further includes a third optical engine, the third optical engine being disposed between the first optical engine and the second optical engine, corresponding:
  • the processor 602 is further configured to control the monitoring signal to be input to a second optical engine disposed at the output side grating, and control the monitoring signal to pass through a third optical engine; determine the Monitoring a first input port corresponding to the light; determining, by the first input port, the first transmission signal and the first monitoring signal formed by the first optical engine after the WDM signal is split; according to the first monitoring The angle of incidence of the signal incident on the third optical engine, controlled The third optical engine rotates in a port plane such that the first monitor signal is output from the third optical engine to the second optical engine, and the monitor light output from the second optical engine Input to the preset output port.
  • the WSS further includes a fourth optical engine, and the fourth optical engine is disposed between the output spherical mirror and the output port; corresponding:
  • the processor 602 controls the monitoring signal to be input to the second optical engine disposed at the output side grating, and is further configured to control the monitoring light to pass through the fourth optical engine; determine from a plurality of input ports to be monitored a second input port, determining, by the monitoring light, the monitoring signal light input by the second input port; controlling the fourth optical according to an incident angle of the monitoring signal light incident on the fourth optical engine The engine rotates within the port plane such that the monitor signal light is output from the fourth optical engine and input to a predetermined output port.
  • the signal light to be monitored is selected by adding a primary optical engine based on the original WSS structure, thereby effectively improving the fault monitoring speed of the WSS structure.
  • the entire spot of the WDM signal is processed without dividing the spot into two parts.
  • the WDM signal can be spectrally processed at an arbitrary ratio while ensuring minimal impact on the insertion loss of the original signal.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

一种用于波长选择开关WSS的信号监控方法及装置，包括：根据输入的WDM信号对第一光学引擎的相位进行编码，使得WDM信号通过所述第一光学引擎后分束为传输信号和监控信号；将监控信号输入到设置于输出侧光栅处的第二光学引擎；控制所述第二光学引擎在所述WDM信号的波长平面内转动，使得监控信号中设定波长的监控光按照预设的角度从所述第二光学引擎输出。本发明所提供的方法和装置解决现有技术中光信号的监测方案耗时多，且无法满足未来网络的快速故障定位需求的问题。

Description

一种用于波长选择开关WSS的信号监控方法及装置 技术领域
本发明涉及网络通信技术领域，尤其涉及一种用于波长选择开关WSS的信号监控方法及装置。
背景技术
随着网络流量和带宽的飞速增长，运营商对于底层的波分网络的智能调度功能的需求越来越迫切，这导致可重构光分插复用器(Reconfigurable Optical Add-Drop Multiplexer，ROADM)逐渐为越来越多的高端运营商的网络所采用。网络中引入ROADM后，运营商可以快速的提供波长级的业务，便于进行网络规划，降低运营费用，便于维护，降低维护成本。
另一方面，光通信长距离传输网络中，系统链路中光电光(optical-electrical-optical，OEO)转换呈减少趋势，所以要通过将光信号转换为电信号后，在电层检测传输信号的误码率变得越来越困难，仅在链路终端测试误码率又不利于故障定位。随着光网络中传输容量的增大和灵活性的提升，系统复杂度越来越高。为了有效的控制和管理光网络，对网络中的高速密集波分复用(Dense Wavelength Division Multiplexing，DWDM)的光信号进行监测的重要性越来越高。
光信号的监测包括多个方面，例如：光功率监测能够反映信道基本工作状态并指导系统执行自动功率均衡，光信噪比(Optical Signal Noise Ratio，OSNR)监测能够比较准确的反映信号质量，色散监测可以反映信道的色散状态以指导系统在光层或电层进行色散补偿。这些参数成为重要的光性能监测内容，有助于光网络的损伤抑制、故障定位、劣化探测、备份和恢复，有利于光网络的稳定工作。对于网络中的所有重要网元，光信号的监测都是必不 可少的。因此，通过ROADM站点，对传输的信号进行实时监控是十分必要的。
波长选择开关(Wavelength Selective Switch，WSS)是当前ROADM的一项技术选择。对于1×N WSS而言，1是指公共(COM)端口，N代表的是分支端口。WSS的运行是，当一组波分复用(Wavelength Division Multiplexing，WDM)信号从COM端口进入时，该组WDM信号按照光波长分开，然后根据系统要求，各波长被路由至N个分支端口中的一个分支端口。相反地，光信号能够从N个分支端口中接收以作为输入并且从COM端口发送以作为输出。
现有技术提出了一种基于LCoS-WSS的信号监控方案，该方案中对于硅基液晶(Liquid Crystal on Silicon，LCoS)上的单个光斑，分为光监控区域和WSS信号切换区域分别处理：例如某个光斑在输出端口方向上共占据200个像素点，可以将其中20个划定为光监控区域，另外的180个划定为WSS信号切换区域。
但是上述现有技术的方案在对监控光进行处理时，同样需要不断的更新LCoS上的相位信息，才能将不同的波长通道分时的滤波出来进行探测监控。而LCoS的扫描更新速度通常在100ms左右，如果要对C波段的80个通道进行扫描，需要近10s的时间，而对于多端口的N×M WSS器件，其时间将更长，无法满足未来网络的快速故障定位的要求。
发明内容
本发明提供一种用于波长选择开关WSS的信号监控方法及装置，本发明所提供的方法和装置解决现有技术中光信号的监测方案耗时多，且无法满足未来网络的快速故障定位需求的问题。
第一方面，提供一种用于波长选择开关WSS的信号监控方法，WSS中输入端口发出的WDM信号通过入射光栅后，所述WDM信号中所包括的各波长的光入射到第一光学引擎的不同位置区域；包括：
根据所述WDM信号对所述第一光学引擎的相位进行编码，使得所述WDM信号通过所述第一光学引擎后分束为传输信号和监控信号，并在输出端口方向以不同的出射角度输出；其中，所述监控信号输入到设置于输出侧光栅处的第二光学引擎；并且传输信号的能量大于监控信号；
从所述监控信号中确定当前需要监控的设定波长的监控光；
根据所述监控光入射到所述第二光学引擎的入射角度和所述监控光输出所述第二光学引擎的出射角度，控制所述第二光学引擎在所述WDM信号的波长平面内转动，使得所述监控光按照预设的角度从所述第二光学引擎输出。
本发明提供方法所适用的WSS中，还添加了一个第二级光学引擎，该级光学引擎设置在WSS的输出侧光栅处。利用第二光学引擎的在波长平面的转动，可以对最终要输出的特定波长的光进行选择，从而就可以在进行监控信号的扫描时，无需刷新第一光学引擎上面的相位信息，提高了信号监控的处理速度。
在一种可能的实现方式中，根据所述WDM信号对所述第一光学引擎的相位进行编码包括：
通过公式：
Figure PCTCN2016097000-appb-000001
对所述第一光学引擎的相位进行编码；
其中，C1：C2为所述传输信号和监控信号的能量比，所述函数
Figure PCTCN2016097000-appb-000002
和函数
Figure PCTCN2016097000-appb-000003
分别对应所述传输信号和监控信号的输出方向。
在上述实现方式中，在使用上述公式对第一光学引擎的相位进行编码，第一光学引擎进行相位调整后是对WDM信号的整个光斑进行处理的，而无需将光斑分为两部分处理。这样可以以任意比例对WDM信号进行分光处理，同时保证对原信号的插损等性能影响最小。
在另外一种可实现的方式中，当所述波长选择开关WSS包括多个输入端口时，所述监控信号输入到设置于输出侧光栅处的第二光学引擎之前，还包括：
控制所述监控信号通过第三光学引擎；其中，该第三光学引擎设置于所述第一光学引擎和所述第二光学引擎之间；
从所述多个输入端口中确定所述监控光对应的第一输入端口；
确定所述第一输入端口所述发出的WDM信号通过所述第一光学引擎后分束形成的第一传输信号和第一监控信号；
根据所述第一监控信号入射到所述第三光学引擎的入射角度，控制所述第三光学引擎在端口平面内转动，使得所述第一监控信号从所述第三光学引擎输出到所述第二光学引擎，并且使得从所述第二光学引擎输出的所述监控光输入到预设的输出端口。
在另外一种可实现方式中，当所述波长选择开关WSS包括多个输入端口，且所述监控光包括从所述多个输入端口输入的多个WDM信号所包含的同一波长的信号光，则所述监控信号输入到设置于输出侧光栅处的第二光学引擎之后，包括
控制所述监控光通过第四光学引擎；
从多个输入端口中确定待监控的第二输入端口，从所述监控光中确定由所述第二输入端口输入的监控信号光；
根据所述监控信号光入射到所述第四光学引擎的入射角度，控制所述第 四光学引擎在端口平面内转动，使得所述监控信号光从所述第四光学引擎输出并输入到预设的输出端口。
上述两种可实现方式针对WSS存在多个输入端的情况，因为存在多个输入端则需要对待检测光的输入端口以及波长进行选择，通过上述两种实现方式则可以利用第二光学引擎的在波长平面的转动，可以对最终要输出的特定波长的光进行选择，从而就可以在进行监控信号的扫描时，无需刷新第一光学引擎上面的相位信息，提高了信号监控的处理速度。
第二方面，提供一种波长选择开关WSS，该WSS包括：输入端口、入射光栅、输入端球面镜、第一光学引擎、输出端球面镜、输出侧光栅和多个输出端口，其中，所述输入端口，用于将输入的WDM信号发送给所述入射光栅；
所述入射光栅，用于将接收的所述WDM信号中的各波长信号分别以不同衍射角度出射到所述输入端球面镜；
所述输入端球面镜，用于将所述各波长信号平行入射到所述第一光学引擎的不同位置区域；
所述第一光学引擎，用于根据所述各波长信号对应的输入端口，进行位相编码调制，将所述各波长信号以不同角度输出到所述输出端球面镜；
所述输出端球面镜，用于将所述各波长信号输出到所述输出光栅；
所述输出光栅，用于将所述各波长信号从不同的输出端口输出；
该WSS还包括设置于所述输出侧光栅处的第二光学引擎：其中
所述第一光学引擎，用于将所述各波长信号中的任一波长信号分束为传输信号和监控信号，并在输出端口方向以不同的出射角度输出所述传输信号和监控信号；使得所述监控信号输入到所述第二光学引擎；
所述第二光学引擎，用于从所述监控信号中确定当前需要监控的设定波 长的监控光，并根据所述监控光入射到所述第二光学引擎的入射角度和所述监控光输出所述第二光学引擎的出射角度，所述第二光学引擎在所述WDM信号的波长平面内转动，使得所述监控光按照预设的角度从所述第二光学引擎输出。
在一种可实现的方式中，当所述输入端口包括多个时，该WSS还包括：
第三光学引擎，所述第三光学引擎设置于所述第一光学引擎和所述第二光学引擎之间；用于根据所述监控光对应的第一监控信号入射到所述第三光学引擎的入射角度，所述第三光学引擎在端口平面内转动，使得所述第一监控信号从所述第三光学引擎输出到所述第二光学引擎，并且使得从所述第二光学引擎输出的所述监控光输入到预设的输出端口。
在另外一种可实现的方式中，当所述输入端口包括多个，且所述监控光包括从所述多个输入端口输入的多个WDM信号所包含的同一波长的信号光，该WSS还包括：
第四光学引擎，该第四光学引擎设置于输出端球面镜和输出端口之间；用于根据监控信号光入射到所述第四光学引擎的入射角度在端口平面内转动，使得所述监控信号光输出并输入到预设的输出端口；其中，所述监控信号光是所述监控光中由待监控的第二输入端口输入的。
第三方面，提供一种用于波长选择开关WSS的信号监控的装置，该装置包括WSS和处理器，所述WSS具体包括输入端口、入射光栅、输入端球面镜、第一光学引擎、输出端球面镜、输出侧光栅和输出端口，所述WSS还包括一个设置于输出侧光栅处的第二光学引擎，所述第二光学引擎用于筛选出待检测的设定波长的监控光；
所述处理器，用于根据所述输入端口发出的WDM信号对所述第一光学引擎的相位进行编码，使得所述WDM信号通过所述第一光学引擎后分束为 传输信号和监控信号，并在输出端口方向以不同的出射角度输出；所述监控信号输入到所述第二光学引擎；并且传输信号的能量大于监控信号；从所述监控信号中确定当前需要监控的设定波长的监控光，并根据所述监控光入射到所述第二光学引擎的入射角度和所述监控光输出所述第二光学引擎的出射角度，控制所述第二光学引擎在所述WDM信号的波长平面内转动，使得所述监控光按照所述出射角度从所述第二光学引擎输出。
在一种可实现的方式中，所述处理器还用于通过公式：
Figure PCTCN2016097000-appb-000004
对所述第一光学引擎的相位进行编码；其中，C1：C2为所述传输信号和监控信号的能量比，所述函数
Figure PCTCN2016097000-appb-000005
和函数
Figure PCTCN2016097000-appb-000006
分别对应所述传输信号和监控信号的输出方向。
在另外一种可实现的方式中，当所述WSS包括多个输入端口，且所述WSS还包括第三光学引擎，所述第三光学引擎设置于所述第一光学引擎和所述第二光学引擎之间，包括：
所述处理器还用于控制所述监控信号输入到设置于输出侧光栅处的第二光学引擎之前，控制所述监控信号通过第三光学引擎；从所述多个输入端口中确定所述监控光对应的第一输入端口；确定所述第一输入端口所述发出的WDM信号通过所述第一光学引擎后分束形成的第一传输信号和第一监控信号；根据所述第一监控信号入射到所述第三光学引擎的入射角度，控制所述第三光学引擎在端口平面内转动，使得所述第一监控信号从所述第三光学引擎输出到所述第二光学引擎，并且使得从所述第二光学引擎输出的所述监控光输入到预设的输出端口。
在另外一种可实现的方式中，当所述WSS包括多个输入端口，且所述监控光包括从所述多个输入端口输入的多个WDM信号所包含的同一波长的信 号光，所述WSS还包括第四光学引擎，所述第四光学引擎设置于所述输出端球面镜与输出端口之间；包括：
所述处理器控制所述监控信号输入到设置于输出侧光栅处的第二光学引擎之后，还用于控制所述监控光通过所述第四光学引擎；从多个输入端口中确定待监控的第二输入端口，从所述监控光中确定由所述第二输入端口输入的监控信号光；根据所述监控信号光入射到所述第四光学引擎的入射角度，控制所述第四光学引擎在端口平面内转动，使得所述监控信号光从所述第四光学引擎输出并输入到预设的输出端口。
上述技术方案中的一个或两个，至少具有如下技术效果：
本发明实施例提供方法所适用的WSS中，还添加了一个第二级光学引擎，该级光学引擎设置在WSS的输出侧光栅处。利用第二光学引擎的在波长平面的转动，可以对最终要输出的特定波长的光进行选择，从而就可以在进行监控信号的扫描时，无需刷新第一光学引擎上面的相位信息，提高了信号监控的处理速度。
附图说明
图1a为本发明实施例提供的一种用于波长选择开关WSS的信号监控方法的流程示意图；
图1b为本发明实施例所提供的方法中利用具体的复合相位对第一光学引擎进行相位编码后的分光效果图；
图1c为复合相位中函数
Figure PCTCN2016097000-appb-000007
和函数
Figure PCTCN2016097000-appb-000008
相位变化示意图；
图2a为现有技术中1×N WSS结构基本光路原理示意图；
图2b为本发明提供方法所实用的1×N WSS结构基本光路原理示意图；
图2c为本发明方法中第一光学引擎进行分光的示意图；
图3a为现有技术中N×M WSS结构基本光路原理示意图；
图3b为本发明实施例提供方法所实用的N×M WSS结构基本光路原理示意图；
图3c为本发明实施例所提供的方法中各光斑在第一光学引擎与第三光学引擎的位置示意图；
图4为为本发明提供方法所实用的另外一种N×M WSS结构基本光路原理示意图；
图5为本发明实施例提供的一种波长选择开关的结构示意图；
图6为本发明实施例提供的一种用于波长选择开关的信号监控的装置的结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
下面结合说明书附图对本发明实施例作进一步详细描述。
实施例一
如图1a所示，本发明实施例提供一种用于波长选择开关WSS的信号监控方法，在该方法中，WSS中输入端口发出的波分复用(Wavelength Division Multiplexing，WDM)信号通过入射光栅后，所述WDM信号中所包括的各波长的光入射到第一光学引擎的不同位置区域；该方法具体包括：
步骤101，根据所述WDM信号对所述第一光学引擎的相位进行编码，使 得所述WDM信号通过所述第一光学引擎后分束为传输信号和监控信号，并在输出端口方向以不同的出射角度输出；其中，所述监控信号输入到设置于输出侧光栅处的第二光学引擎；并且传输信号的能量大于监控信号；
通过入射光栅后WDM信号中不同波长的光平行入射到第一光学引擎的不同区域，通过对第一光学引擎进行相位处理，能够将某个波长对应的光斑能量分束为两部分(分别对应传输信号部分和监控信号部分)分别输出，其中一大部分能量集中在该信号本身的输出方向(即传输信号部分)，另一小部分能量的方向为监控端口输出方向(即监控信号部分)；使得监控信号的划分对信号传输所造成的影响降到最小。
步骤102，从所述监控信号中确定当前需要监控的设定波长的监控光；
步骤103，根据所述监控光入射到所述第二光学引擎的入射角度和所述监控光输出所述第二光学引擎的出射角度，控制所述第二光学引擎在所述WDM信号的波长平面内转动，使得所述监控光按照预设的角度从所述第二光学引擎输出。
在本发明实施例中，该波长平面是指述WDM信号通过入射光栅后，该WDM信号中所包含的不同波长的信号光以不同角度展开的平面。
本发明实施例提供方法所适用的WSS中，还添加了一个第二级光学引擎(该第二光学引擎可以是单个MEMS微镜)，该级光学引擎设置在WSS的输出侧光栅处。当不同波长信号的光以不同角度入射到第二光学引擎上时，控制第二光学引擎在波长平面内转动，就可以使得不同波长对应的监控光分时输出。利用第二光学引擎的在波长平面的转动，可以对最终要输出的特定波长的光进行选择，从而就可以在进行监控信号的扫描时，无需刷新第一光学引擎上面的相位信息，只需要在波长方向上快速转动第二级引擎，就可以实现快速的信号监控功能。
本发明实施例中，第一光学引擎进行相位调整后是对WDM信号的整个光斑进行处理的，而无需将光斑分为两部分处理。这样可以以任意比例对WDM信号进行分光处理，同时保证对原信号的插损等性能影响最小。则根据所述WDM信号对所述第一光学引擎的相位进行编码的具体实现方式可以是：
当某个波长信号的光入射到第一光学引擎的某个区域时，对该区域的相位进行编码，从而将该区域的光斑从特定的方向按照特定的分光比例进行输出。例如：
通过公式：
Figure PCTCN2016097000-appb-000009
对所述第一光学引擎的相位进行编码；
其中，C1：C2为所述传输信号和监控信号的能量比，所述函数
Figure PCTCN2016097000-appb-000010
和函数
Figure PCTCN2016097000-appb-000011
分别对应所述传输信号和监控信号的输出方向；若WDM信号通过第一光学引擎时受相位函数
Figure PCTCN2016097000-appb-000012
和能量比作用后，则所述WDM信号中第一部分作为传输信号从第一方向无分光输出；若WDM信号通过第一光学引擎时受相位函数
Figure PCTCN2016097000-appb-000013
和能量比作用后，所述WDM信号中除第一部分外的第二部分作为监控信号从第二方向无分光输出；并且第一方向与第二方向不相同。
在具体的应用实例中，WSS有N个输出端口，如果设定第1～N-1个输出端口用于输出传输信号，第N个端口用于输出监控信号；则与
Figure PCTCN2016097000-appb-000014
对应的的传输信号的输出方向则为第1～N-1个输出端口的方向；则与
Figure PCTCN2016097000-appb-000015
对应的监控信号的输出方向则为第N个输出端口的方向
因为函数
Figure PCTCN2016097000-appb-000016
和函数
Figure PCTCN2016097000-appb-000017
分别对应所述传输信号和监控信号的输出方向，因此，当第一光学引擎加载一个复合相位
Figure PCTCN2016097000-appb-000018
时，可以实现分光效果(如图1b所示)。
另外，
Figure PCTCN2016097000-appb-000019
与
Figure PCTCN2016097000-appb-000020
通常为从0至2pi变化的线性相位(
Figure PCTCN2016097000-appb-000021
和
Figure PCTCN2016097000-appb-000022
相位变化如图1c)，相位变化的快慢(周期)，决定出射光的方向。
在具体的应用环境中，WSS包括多种实现结构大体包括：(1)一个WSS中包括一个输入端口和多个输出端口，即单进多出(1×N WSS)；(2)一个WSS中包括多个输入端口和多个输出端口，即多进多出(N×M WSS)，本发明实施例所提供的方法使用到不同的WSS结构中时，具体实现方式不同，具体实现如下：
一、本发明实施例所提供的方法应用到1×N WSS结构时，具体实现可以是：
现有技术中1×N WSS结构基本光路原理示意图如图2a所示，其中，WDM信号(该信号中包括多个不同波长的信号，即多波长信号)通过光纤阵列(包含准直透镜)后，进入入射光栅，入射光栅将多波长信号以不同衍射角度出射；多波长信号中各信号通过球面镜后，平行入射到交换引擎LCoS(即实施例一中的第一光学引擎)的不同位置区域；而后根据不同波长信号的出射端口，在LCoS上进行位相编码调制，将不同波长的光以不同角度输出；接着各波长依次经过球面镜以及输出侧光栅，从不同的出射端口进行信号输出。
在本发明实施例所提供的方案中，在原有1×N WSS结构的基础上添加了一个第二光学引擎，调整后本发明实施例1×N WSS结构示意图如图2b所示，本发明实施例所提供的方法中信号处理方式在光学引擎之前以及第二光学引擎之后都与现有技术相同，在第一光学引擎、第二光学引擎中，以及之间的处理过程可以是：
不同波长的光平行入射到第一光学引擎(该第一光学引擎可以是LCoS)的不同区域，通过对LCoS上面相位处理，将某个波长对应的光斑能量分束为两部分分别输出，其中一大部分能量集中在该信号本身的输出方向，另一小部分能量的方向为监控端口输出方向(如图2c所示)。
从第一光学引擎输出的传输信号和监控信号，通过球面镜后传输信号输入到出射光栅，监控信号输入到添加的第二光学引擎，使得第二光学引擎从监控信号中筛选出当前需要进行监控的特定波长的监控光。
二、本发明实施例所提供的方法应用到多进多出(N×M WSS)的WSS结构时，N×M WSS结构还包括两种：第一种、N×M WSS(具体结构如图3a所示)的作用为：任意一个输出端口的光信号可以来自任意一个输入端口，或者来自多个输入端口的信号的混合；第二种、N×M WSS结构中有N个输入端以及M个输出端，其中M个输出端口的输出信号只能来自N个端口的其中一个。以下分别对两种情况进行具体说明：
1、针对第一种N x M WSS结构，因为存在多个输入端口，所以需要确定对哪一个输入端口的多波长信号进行监控，并且还需要进一步确定对多波长信号中哪一个波长的光进行监控，所以在所述步骤101和步骤102的基础上，还需要进一步通过以下方式从多个输入端口对应的多波长信号中筛选出需要进行监控的特定多波长信号，所以为了实现该实施例的方法，本发明实施例所提供的方法该WSS结构包括第一光学引擎、第二光学引擎和第三光学引擎(具体如图3b所示)，其中，从多个输入端口所对应的多波长信号中确定特定多波长信号的，具体实现可以是，在所述监控信号输入到设置于输出侧光栅处的第二光学引擎之前，还包括：
A1，控制所述监控信号通过第三光学引擎；其中，该第三光学引擎设置于所述第一光学引擎和所述第二光学引擎之间；
A2，从多个输入端口中确定所述监控光对应的第一输入端口；
因为该实施例的方法应用到包括多个输入端口的WSS结构中，所以需要确定在某一时间对哪一个输入端口所对应的信号进行监控，需要确定最终输出的监控光所对应的第一输入端口。
A3，确定所述第一输入端口所述发出的WDM信号通过所述第一光学引擎后分束形成的第一传输信号和第一监控信号；
A4，根据所述第一监控信号入射到所述第三光学引擎的入射角度，控制所述第三光学引擎在端口平面内转动，使得所述第一监控信号从所述第三光学引擎输出到所述第二光学引擎，并且使得从所述第二光学引擎输出的所述监控光输入到预设的输出端口。
在该实施例中第三光学引擎在端口平面内转动的最终效果要达到：将第一监控信号从多个输入端口来的监控信号中筛选出来，并且保证第一监控信号通过第二光学引擎后输出的监控光在端口平面内的出射方向要与输出端口对应，所以在控制第三光学引擎在端口平面旋转时，需要参考第一监控信号的入射角度以及最终监控光的输出端口的位置；从而才能保证需要进行监控的监控光在特定的时间从特定的输出端口输出。
以下结合具体的结构附图对本发明实施例所提供的方法应用到第一种N x M WSS结构的具体实现进行说明：
在该实施例中，相对于1×N WSS结构，多端口WSS器件需要两级光学引擎(如图3a所示第一光学引擎和第三光学引擎)，对应N个输入端口的器件，第一光交换引擎上将含有N行光斑，每一行光斑在波长方向上进行展开。对于任何一个输入端口的任意波长，可以通过第一光学引擎的切换，映射到第三光学交换引擎上，第三光学引擎用于将映射到该引擎某个区域的信号进行切换(光路偏转)，从而耦合到预设的输出端口进行输出。
本发明实施例所提供的N×M WSS结构如图3b所示，从N个输入端口进入的WDM光通过准直镜阵列、光栅以及透镜等装置后，在波长方向展开排列成N行透射至第一光学引擎上。然后针对第一光学引擎上每行光斑中的各个波长信号，通过相位算法进行分光操作。将入射的各个波长信号按照既定的分光比例分为两部分：其中一部分为传输信号，另一部分为监控信号。传输信号的方向由传输信号所对应的输出端确定，例如需要将该某一波长信号从第二个输出端口输出，即通过对第一光学引擎的相位控制，使得该某一波长信号映射至第三光学引擎的第二个输出端口对应的位置。因为监控信号都通过同一输出端口输出，所以所有监控信号都映射到第三光学引擎的特定位置。并且各个输入端口对应的监控信号的方向由监控光输出端口在第三光学引擎上对应的光斑位置确定。
因为各输入端口对应的监控信号都映射到第三光学引擎的同一块特定位置区域，但在端口平面上的入射角是不同的,因此通过控制第三光学引擎在端口平面转动时，可以选择输出来自哪个输入端口的监控信号。
在第三光学引擎确定某一个射入端口的监控信号后，该监控信号映射到第二光学引擎，由设置在输出侧光栅处的第二光学引擎在波长方向旋转实现选择某一个特定波长的监控光输出。
各光斑在第一光学引擎与第三光学引擎的位置如图3c所示，第一光学引擎将含有N行光斑，分别对应于N个输入端口的WDM信号；第三光学引擎将含有(M+1)行光斑，其中M刚对应于M个输出端口的光信号，另一行光斑对应于来自于1至N个输入端口的监控信号。从图中看出，对于某一个光波长通道λk,其光斑对应于来自N个输入端口的监控信号(不同的入射角度)。
2、针对第二种N×M WSS结构，本发明实施例所提供的方法适用于图4所示的WSS结构，该WSS结构中包括第一光学引擎、第二光学引擎和第四 光学引擎。第一光学引擎将WDM信号进行分束成两部分后，各个输入端口端口对应的监控信号都会输入到第二光学引擎的特定位置，对于第二光学引擎而言，只能将特定波长的监控光输出，但是这个特定波长的监控光是包括所述多个输入端口同一波长的信号光；例如要检测第一输入端口输入的红光，则在第二光学引擎所输出的监控光中则会包括所有输入端口所输入WDM信号中的红光；为了监测特定端口的特定波长监控光，则还需要进一步的从第二光学引擎输出的监控光中选择某一个。具体选择某一个特定波长的监控光，通过第四光学引擎实现，具体实现可以是：
B1，控制所述监控光通过第四光学引擎；
B2，从多个输入端口中确定待监控的第二输入端口，从所述监控光中确定由所述第二输入端口输入的监控信号光；
B3，根据所述监控信号光入射到所述第四光学引擎的入射角度，控制所述第四光学引擎在端口平面内转动，使得所述监控信号光从所述第四光学引擎输出并输入到预设的输出端口。
以下结合具体的结构附图对本发明实施例所提供的方法应用到第二种N×M WSS结构的具体实现进行说明：
由于在现有的WSS结构中，输出侧光栅在第四光学引擎之前，从第一光学引擎输出的光合波后的光信号映射至第四光学引擎时，第四光学引擎的作用是选择输出来自哪个输入端口的合波信号，而无法针对每个波长分别选择，所以基于本发明方案中新添加在输出侧光栅处的第二光学引擎，则可以实现对信号波长的选择，具体结构如图4所示。该方法的具体实现可以是：
本发明实施例所提供的N×M WSS结构如图4所示，从N个输入端口进入的WDM光通过准直镜阵列、光栅以及透镜等装置后，在波长方向展开排列成N行透射至第一光学引擎上。然后针对第一光学引擎上每行光斑中的各 个波长信号，通过相位算法进行分光操作。将入射的各个波长信号按照既定的分光比例分为两部分：其中一部分为传输信号，另一部分为监控信号。传输信号的方向由传输信号所对应的输出端确定，通过对第一光学引擎的相位控制，使得各个输入端口的监控信号映射至第二光学引擎的监控光输出端口对应的位置。
各输入端口中对应的监控信号都映射到第二光学的特定位置后，第二光学引擎在波长平面内旋转会将各监控信号中特定波长的监控光筛选输出，并映射到第四光学引擎的特定位置。
因为各输入端口对应的特定波长监控光都映射到第四光学引擎的特定位置，则控制第四光学引擎在端口平面转动时，可以选择输出来自哪个输入端口的特定波长的监控光。
采用本发明实施例所提供的方法，通过在原有WSS结构的基础上增加一级光学引擎对需要监控的信号光进行选择，从而有效提高WSS结构的故障监控速度。
另外，本发明实施例所提供的方法中，第一光学引擎进行相位调整后是对WDM信号的整个光斑进行处理的，而无需将光斑分为两部分处理。这样可以以任意比例对WDM信号进行分光处理，同时保证对原信号的插损等性能影响最小。
实施例二
如图5所示，本发明实施例提供一种波长选择开关WSS，该WSS包括：输入端口501、入射光栅502、输入端球面镜503、第一光学引擎504、输出端球面镜505、输出侧光栅506和输出端口507，其中：
该输入端口501，用于将输入的WDM信号发送给所述入射光栅；
入射光栅502，用于将接收的所述WDM信号中的各波长信号分别以不同 衍射角度出射到所述输入端球面镜；
输入端球面镜503，用于将所述各波长信号平行入射到所述第一光学引擎的不同位置区域；
第一光学引擎504，用于根据所述各波长信号对应的输入端口，进行位相编码调制，将所述各波长信号以不同角度输出到所述输出端球面镜；
输出端球面镜505，用于将所述各波长信号输出到所述输出侧光栅；
输出侧光栅，用于将所述各波长信号从不同的输出端口输出
本发明实施例所提供的方案中，该WSS还包括第二光学引擎508，该第二光学引擎508设置于输出侧光栅506处；基于设置有该第二光学引擎508的结构，其中：
第一光学引擎504还用于将所述各波长信号中的任一波长信号分束为传输信号和监控信号，并在输出端口方向以不同的出射角度输出所述传输信号和监控信号；所述监控信号输入到所述第二光学引擎508；
对应的该第二光学引擎508，用于从所述监控信号中确定当前需要监控的设定波长的监控光，并根据所述监控光入射到所述第二光学引擎508的入射角度和所述监控光输出所述第二光学引擎508的出射角度，在所述WDM信号的波长平面内转动，使得所述监控光按照预设的角度从所述第二光学引擎输出。
在具体的应用环境中，WSS包括多种实现结构大体包括：一个输入信号对应多个输出信号，即单进多出(1×N WSS)；或者，多个输入信号对应多个输出信号，即多进多出N×M WSS，对于包括多个输入端口的WSS结构，具体实现方式不同，具体实现如下：
一、N×M WSS的作用为：任意一个输出端口的光信号可以来自任意一个输入端口，或者来自多个输入端口的信号的混合，则该波长选择开关WSS 包括(结构如图3b所示)：
第三光学引擎，所述第三光学引擎设置于所述第一光学引擎和所述第二光学引擎之间；用于从多个输入端口对应的监控光中确定第一监控信号；根据所述第一监控信号入射到所述第三光学引擎的入射角度，所述第三光学引擎在端口平面内转动，使得所述第一监控信号从所述第三光学引擎输出到所述第二光学引擎，并且使得从所述第二光学引擎输出的所述监控光输入到预设的输出端口。
二、N×M WSS结构中有N个输入端以及M个输出端，其中M个输出端口的输出信号只能来自N个端口的其中一个，则该波长选择开关WSS包括(结构如图4所示)：
第四光学引擎，该第四光学引擎设置于输出端球面镜和输出端口之间；用于根据监控信号光入射到所述第四光学引擎的入射角度在端口平面内转动，使得所述监控信号光输出并输入到预设的输出端口；其中，所述监控信号光是所述监控光中由待监控的第二输入端口输入的。
实施例三
如图6所示，本发明实施例还提供一种用于波长选择开关(WSS)的信号监控的装置，该装置包括波长选择开关601和处理器602，其中波长选择开关601具体包括：输入端口、入射光栅、输入端球面镜、第一光学引擎、输出端球面镜、输出侧光栅和输出端口，其中该WSS还包括一个设置于输出侧光栅处的第二光学引擎，所述第二光学引擎用于筛选出待检测的设定波长的监控光；
所述处理器602，用于根据所述输入端口发出的WDM信号对所述第一光学引擎的相位进行编码，使得所述WDM信号通过所述第一光学引擎后分束为传输信号和监控信号，并在输出端口方向以不同的出射角度输出；所述监 控信号输入到所述第二光学引擎；并且传输信号的能量大于监控信号；从所述监控信号中确定当前需要监控的设定波长的监控光，并根据所述监控光入射到所述第二光学引擎的入射角度和所述监控光输出所述第二光学引擎的出射角度，控制所述第二光学引擎在所述WDM信号的波长平面内转动，使得所述监控光按照所述出射角度从所述第二光学引擎输出。
可选的，所述处理器602还用于通过公式：
Figure PCTCN2016097000-appb-000023
对所述第一光学引擎的相位进行编码；其中，C1：C2为所述传输信号和监控信号的能量比，所述函数
Figure PCTCN2016097000-appb-000024
和函数
Figure PCTCN2016097000-appb-000025
分别对应所述传输信号和监控信号的输出方向。
本发明实施例所提供的装置应用到多进多出(N×M WSS)的WSS结构时，N×M WSS结构具体包括两种：第一种、N×M WSS的作用为：任意一个输出端口的光信号可以来自任意一个输入端口，或者来自多个输入端口的信号的混合；第二种、N×M WSS结构中有N个输入端以及M个输出端，其中M个输出端口的输出信号只能来自N个端口的其中一个。针对两种情况本实施例所提供的装置具体可以是：
一、针对第一种多进多出的WSS结构，则所述WSS还包括第三光学引擎，所述第三光学引擎设置于所述第一光学引擎和所述第二光学引擎之间，则对应的：
所述处理器602还用于控制所述监控信号输入到设置于输出侧光栅处的第二光学引擎之前，控制所述监控信号通过第三光学引擎；从所述多个输入端口中确定所述监控光对应的第一输入端口；确定所述第一输入端口所述发出的WDM信号通过所述第一光学引擎后分束形成的第一传输信号和第一监控信号；根据所述第一监控信号入射到所述第三光学引擎的入射角度，控制 所述第三光学引擎在端口平面内转动，使得所述第一监控信号从所述第三光学引擎输出到所述第二光学引擎，并且使得从所述第二光学引擎输出的所述监控光输入到预设的输出端口。
二、针对第二种多进多出的WSS结构，所述WSS还包括第四光学引擎，所述第四光学引擎设置于所述输出端球面镜与输出端口之间；对应的：
所述处理器602控制所述监控信号输入到设置于输出侧光栅处的第二光学引擎之后，还用于控制所述监控光通过所述第四光学引擎；从多个输入端口中确定待监控的第二输入端口，从所述监控光中确定由所述第二输入端口输入的监控信号光；根据所述监控信号光入射到所述第四光学引擎的入射角度，控制所述第四光学引擎在端口平面内转动，使得所述监控信号光从所述第四光学引擎输出并输入到预设的输出端口。
上述本申请实施例中的技术方案，至少具有如下的技术效果或优点：
采用本发明实施例所提供的方法和装置，通过在原有WSS结构的基础上增加一级光学引擎对需要监控的信号光进行选择，从而有效提高WSS结构的故障监控速度。
另外，本发明实施例所提供的方法和装置中，第一光学引擎进行相位调整后是对WDM信号的整个光斑进行处理的，而无需将光斑分为两部分处理。这样可以以任意比例对WDM信号进行分光处理，同时保证对原信号的插损等性能影响最小。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通 过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (11)

  1. 一种用于波长选择开关WSS的信号监控方法，WSS中输入端口发出的波分复用WDM信号通过入射光栅后，所述WDM信号中所包括的各波长的光入射到第一光学引擎的不同位置区域；其特征在于，包括：
    根据所述WDM信号对所述第一光学引擎的相位进行编码，使得所述WDM信号通过所述第一光学引擎后分束为传输信号和监控信号，并在输出端口方向以不同的出射角度输出；其中，所述监控信号输入到设置于输出侧光栅处的第二光学引擎，并且传输信号的能量大于监控信号；
    从所述监控信号中确定当前需要监控的设定波长的监控光；
    根据所述监控光入射到所述第二光学引擎的入射角度和所述监控光输出所述第二光学引擎的出射角度，控制所述第二光学引擎在所述WDM信号的波长平面内转动，使得所述监控光按照预设的角度从所述第二光学引擎输出。
  2. 如权利要求1所述的方法，其特征在于，根据所述WDM信号对所述第一光学引擎的相位进行编码包括：
    通过公式：
    Figure PCTCN2016097000-appb-100001
    对所述第一光学引擎的相位进行编码；
    其中，C1：C2为所述传输信号和监控信号的能量比，所述函数
    Figure PCTCN2016097000-appb-100002
    和函数
    Figure PCTCN2016097000-appb-100003
    分别对应所述传输信号和监控信号的输出方向。
  3. 如权利要求1或2所述的方法，其特征在于，当所述波长选择开关WSS包括多个输入端口时，所述监控信号输入到设置于输出侧光栅处的第二光学引擎之前，还包括：
    控制所述监控信号通过第三光学引擎；其中，该第三光学引擎设置于所 述第一光学引擎和所述第二光学引擎之间；
    从所述多个输入端口中确定所述监控光对应的第一输入端口；
    确定所述第一输入端口所述发出的WDM信号通过所述第一光学引擎后分束形成的第一传输信号和第一监控信号；
    根据所述第一监控信号入射到所述第三光学引擎的入射角度，控制所述第三光学引擎在端口平面内转动，使得所述第一监控信号从所述第三光学引擎输出到所述第二光学引擎，并且使得从所述第二光学引擎输出的所述监控光输入到预设的输出端口。
  4. 如权利要求1或2所述的方法，其特征在于，当所述波长选择开关WSS包括多个输入端口，且所述监控光包括从所述多个输入端口输入的多个WDM信号所包含的同一波长的信号光，则所述监控信号输入到设置于输出侧光栅处的第二光学引擎之后，所述方法包括：
    控制所述监控光通过第四光学引擎；
    从多个输入端口中确定待监控的第二输入端口，从所述监控光中确定由所述第二输入端口输入的监控信号光；
    根据所述监控信号光入射到所述第四光学引擎的入射角度，控制所述第四光学引擎在端口平面内转动，使得所述监控信号光从所述第四光学引擎输出并输入到预设的输出端口。
  5. 一种波长选择开关WSS，该WSS包括：输入端口、入射光栅、输入端球面镜、第一光学引擎、输出端球面镜、输出侧光栅和多个输出端口，其中，所述输入端口，用于将输入的WDM信号发送给所述入射光栅；
    所述入射光栅，用于将接收的所述WDM信号中的各波长信号分别以不同衍射角度出射到所述输入端球面镜；
    所述输入端球面镜，用于将所述各波长信号平行入射到所述第一光学引 擎的不同位置区域；
    所述第一光学引擎，用于根据所述各波长信号对应的输入端口，进行位相编码调制，将所述各波长信号以不同角度输出到所述输出端球面镜；
    所述输出端球面镜，用于将所述各波长信号输出到所述输出光栅；
    所述输出光栅，用于将所述各波长信号从不同的输出端口输出；
    其特征在于，该WSS还包括设置于所述输出侧光栅处的第二光学引擎：其中
    所述第一光学引擎，还用于将所述各波长信号中的任一波长信号分束为传输信号和监控信号，并在输出端口方向以不同的出射角度输出所述传输信号和监控信号；使得所述监控信号输入到所述第二光学引擎；
    所述第二光学引擎，用于从所述监控信号中确定当前需要监控的设定波长的监控光，并根据所述监控光入射到所述第二光学引擎的入射角度和所述监控光输出所述第二光学引擎的出射角度，在所述WDM信号的波长平面内转动，使得所述监控光按照预设的角度从所述第二光学引擎输出。
  6. 如权利要求5所述的WSS，其特征在于，当所述输入端口包括多个时，该WSS还包括：
    第三光学引擎，所述第三光学引擎设置于所述第一光学引擎和所述第二光学引擎之间；用于根据所述监控光对应的第一监控信号入射到所述第三光学引擎的入射角度，所述第三光学引擎在端口平面内转动，使得所述第一监控信号从所述第三光学引擎输出到所述第二光学引擎，并且使得从所述第二光学引擎输出的所述监控光输入到预设的输出端口。
  7. 如权利要求5所述的WSS，其特征在于，当所述输入端口包括多个，且所述监控光包括从所述多个输入端口输入的多个WDM信号所包含的同一波长的信号光，该WSS还包括：
    第四光学引擎，该第四光学引擎设置于输出端球面镜和输出端口之间；用于根据监控信号光入射到所述第四光学引擎的入射角度在端口平面内转动，使得所述监控信号光输出并输入到预设的输出端口；其中，所述监控信号光是所述监控光中由待监控的第二输入端口输入的。
  8. 一种用于波长选择开关WSS的信号监控的装置，该装置包括WSS和处理器，所述WSS具体包括输入端口、入射光栅、输入端球面镜、第一光学引擎、输出端球面镜、输出侧光栅和输出端口，其特征在于，所述WSS还包括一个设置于输出侧光栅处的第二光学引擎，所述第二光学引擎用于筛选出待检测的设定波长的监控光；
    所述处理器，用于根据所述输入端口发出的WDM信号对所述第一光学引擎的相位进行编码，使得所述WDM信号通过所述第一光学引擎后分束为传输信号和监控信号，并在输出端口方向以不同的出射角度输出；所述监控信号输入到所述第二光学引擎；并且传输信号的能量大于监控信号；从所述监控信号中确定当前需要监控的设定波长的监控光，并根据所述监控光入射到所述第二光学引擎的入射角度和所述监控光输出所述第二光学引擎的出射角度，控制所述第二光学引擎在所述WDM信号的波长平面内转动，使得所述监控光按照所述出射角度从所述第二光学引擎输出。
  9. 如权利要求8所述的装置，其特征在于，所述处理器还用于通过公式：
    Figure PCTCN2016097000-appb-100004
    对所述第一光学引擎的相位进行编码；其中，C1：C2为所述传输信号和监控信号的能量比，所述函数
    Figure PCTCN2016097000-appb-100005
    和函数
    Figure PCTCN2016097000-appb-100006
    分别对应所述传输信号和监控信号的输出方向。
  10. 如权利要求8或9所述的装置，当所述WSS包括多个输入端口，且所述WSS还包括第三光学引擎，所述第三光学引擎设置于所述第一光学引擎 和所述第二光学引擎之间，其特征在于，包括：
    所述处理器还用于控制所述监控信号输入到设置于输出侧光栅处的第二光学引擎之前，控制所述监控信号通过第三光学引擎；从所述多个输入端口中确定所述监控光对应的第一输入端口；确定所述第一输入端口所述发出的WDM信号通过所述第一光学引擎后分束形成的第一传输信号和第一监控信号；根据所述第一监控信号入射到所述第三光学引擎的入射角度，控制所述第三光学引擎在端口平面内转动，使得所述第一监控信号从所述第三光学引擎输出到所述第二光学引擎，并且使得从所述第二光学引擎输出的所述监控光输入到预设的输出端口。
  11. 如权利要求8或9所述的装置，当所述WSS包括多个输入端口，且所述监控光包括从所述多个输入端口输入的多个WDM信号所包含的同一波长的信号光，所述WSS还包括第四光学引擎，所述第四光学引擎设置于所述输出端球面镜与输出端口之间；其特征在于，包括：
    所述处理器控制所述监控信号输入到设置于输出侧光栅处的第二光学引擎之后，还用于控制所述监控光通过所述第四光学引擎；从多个输入端口中确定待监控的第二输入端口，从所述监控光中确定由所述第二输入端口输入的监控信号光；根据所述监控信号光入射到所述第四光学引擎的入射角度，控制所述第四光学引擎在端口平面内转动，使得所述监控信号光从所述第四光学引擎输出并输入到预设的输出端口。
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