CN104166291B - A kind of optical signal add-drop multiplexer and optical signal processing method - Google Patents
A kind of optical signal add-drop multiplexer and optical signal processing method Download PDFInfo
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- CN104166291B CN104166291B CN201310182512.XA CN201310182512A CN104166291B CN 104166291 B CN104166291 B CN 104166291B CN 201310182512 A CN201310182512 A CN 201310182512A CN 104166291 B CN104166291 B CN 104166291B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 378
- 238000003672 processing method Methods 0.000 title claims abstract description 20
- 230000008878 coupling Effects 0.000 claims abstract description 61
- 238000010168 coupling process Methods 0.000 claims abstract description 61
- 238000005859 coupling reaction Methods 0.000 claims abstract description 61
- 239000000835 fiber Substances 0.000 claims abstract description 44
- 238000005086 pumping Methods 0.000 claims description 211
- 238000006243 chemical reaction Methods 0.000 claims description 123
- 230000010287 polarization Effects 0.000 claims description 99
- 230000033228 biological regulation Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 claims description 3
- 239000013307 optical fiber Substances 0.000 abstract description 16
- 230000000694 effects Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 210000001367 artery Anatomy 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 210000003462 vein Anatomy 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000009022 nonlinear effect Effects 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/353—Frequency conversion, i.e. wherein a light beam is generated with frequency components different from those of the incident light beams
- G02F1/3534—Three-wave interaction, e.g. sum-difference frequency generation
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/365—Non-linear optics in an optical waveguide structure
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/39—Non-linear optics for parametric generation or amplification of light, infrared or ultraviolet waves
- G02F1/395—Non-linear optics for parametric generation or amplification of light, infrared or ultraviolet waves in optical waveguides
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2203/00—Function characteristic
- G02F2203/58—Multi-wavelength, e.g. operation of the device at a plurality of wavelengths
- G02F2203/585—Add/drop devices
Abstract
The embodiment of the invention discloses a kind of optical signal add-drop multiplexer and optical signal processing method, it is related to optical-fiber network technical field, it is low to solve the speed handled in the prior art time slot subchannel information in optical time domain, the problem of very flexible.The optical signal add-drop multiplexer, including input optical coupling unit, second nonlinear fiber waveguide and output optical coupling unit, wherein described input light coupling unit connects the second nonlinear fiber waveguide, and the second nonlinear fiber waveguide connects the output optical coupling unit.The present invention is used for optical signal prosessing.
Description
Technical field
The present invention relates to optical-fiber network technical field, more particularly to a kind of optical signal add-drop multiplexer and optical signal prosessing side
Method.
Background technology
WDM (wavelength division multiplexing wavelength-division multiplex) optical-fiber network is the important of optical-fiber network transmission
Using OADM (optical add/dr op multiplexing light top and bottom paths add drop multiplex) technology is the height at network node
The major technique of fast all-optical signal processing.OTDM (optical time division multiplexing Optical Time Division Multiplexings) skill
Art optical-fiber network is multiplexed using time dimension by different time-gap subchannel, improves information capacity, and one as WDM optical-fiber networks
Individual important composition.OADM technologies as all-optical signal processing key technology, while being also an important branch of All-Optical Communication Network
Support technology, plays important transport hub effect in optical communication system.
Existing road add drop multiplex (OADM) device up and down includes signal input port, lower road port, upper road port and output
Port.Flashlight includes n wavelength channel, into the input port of light top and bottom path add-drop multiplexer, according to business need, from n
In individual wavelength channel, the wavelength channel needed for selectively being exported from lower road port, correspondingly needed for the input of upper road port
Wavelength channel, and it is other with local unrelated wavelength channel just and upper wavelength-channels be multiplexed together after divide from light top and bottom path
The output port output of insert multiplexer.
The existing signal transacting scheme for time domain subchannel is first converts optical signals into electric signal, in electric signal
After corresponding non-slotted channel is handled, reconvert is exported into optical signal.
During stating the optical signal prosessing to time domain subchannel in realization, inventor has found at least to deposit in the prior art
In following problem：
Signal transacting scheme to time domain subchannel is the Electric signal processing technology of optical-electrical-optical, and information processing is by " electricity
The limitation of sub- bottleneck ", speed is low, additionally due to it is related to the modulation and demodulation of signal, opto-electronic conversion or electro-optic conversion process
In, Electric signal processing is also limited by optical signal modulation form, therefore poor to the flexibility of optical signal prosessing.
The content of the invention
Embodiments of the invention provide a kind of optical signal add-drop multiplexer and optical signal processing method, when can realize full light
The processing of domain signal, improves speed and the flexibility of optical signal prosessing at network node.
Embodiments of the invention are adopted the following technical scheme that：
There is provided a kind of optical signal add-drop multiplexer, including input optical coupling unit, second nonlinear fiber waveguide for first aspect
And output optical coupling unit；
The input optical coupling unit connects the second nonlinear fiber waveguide, and the second nonlinear fiber waveguide connects institute
State output optical coupling unit；
Wherein described input light coupling unit, receives input signal light all the way, and produces continuous pumping light all the way and at least
Pulse pumping light all the way, and by the input signal light and continuous pumping light all the way and at least couple all the way together with pulse pumping light
Input the second nonlinear fiber waveguide；
The second nonlinear fiber waveguide, receives the input signal light, continuous pumping light and at least pulse pumping all the way
Light, and by the input signal light with it is described at least pulse pumping light is converted into conversion signal light all the way, by the input signal
Light, described at least pulse pumping light and the continuous pumping light are converted at least idle signal light all the way all the way, and described will turn
Change flashlight and it is described at least all the way idle signal light output to the output optical coupling unit；
The output optical coupling unit, receives at least idle signal light and the conversion signal light, and described in general extremely all the way
Few idle signal light as road signal light output is at least descended all the way all the way, by the conversion signal light output.
With reference in a first aspect, in the first possible implementation, described optical signal add-drop multiplexer also includes：It is defeated
Go out signal optical multiplex unit, connect the output optical coupling unit, receive at least road flashlight and the output optocoupler on the way
The conversion signal light of unit output is closed, at least road flashlight is coupled to conduct after the conversion signal light on the way by described in
Output signal light output.
Optical signal add-drop multiplexer with reference to first aspect described in the first possible mode, in second of possible realization
In mode, the output signal optical multiplex unit, including：
Road signal Optical Receivers, a conversion signal Optical Receivers and the 3rd photo-coupler, described at least one
3rd photo-coupler includes at least two input ports and an output port；
The upper road signal Optical Receivers is connected to an input port of the 3rd photo-coupler, on described
The input port of road signal Optical Receivers receives upper road flashlight；
The conversion signal Optical Receivers is connected to an input port of the 3rd coupler, passes through the conversion
The input port of signal Optical Receivers receives the conversion signal light of the output signal optical multiplex unit output；
The upper road optical signal that 3rd photo-coupler receives signal Optical Receivers in road at least one is coupled to institute
State after the conversion signal light of conversion signal Optical Receivers reception as output signal light output.
Optical signal add-drop multiplexer with reference to first aspect described in the first possible mode, in the third possible realization
In mode, the upper road signal Optical Receivers, including the second adjustable optical delay line and upper road signal optical polarization controller；
The output port of the second adjustable optical delay line is connected to the input of the upper road signal optical polarization controller
Mouthful, the output port of the upper road signal optical polarization controller is connected to an input port of the 3rd photo-coupler；
The second adjustable optical delay line, receives the upper road by the input port of the described second adjustable optical delay line and believes
Number light, and the upper road flashlight is adjusted to the free timeslot subchannel that the conversion signal light is directed in time domain；
The upper road signal optical polarization controller, adjusts the polarization state of the upper road information light.
Optical signal add-drop multiplexer with reference to first aspect described in the first possible mode, in the 4th kind of possible realization
In mode, the conversion signal Optical Receivers, including conversion signal optical polarization controller,
The input port of the conversion signal optical polarization controller connects the output optical coupling unit, the conversion signal
The output port of optical polarization controller is connected to an input port of the 3rd coupler；
The conversion signal optical polarization controller, connects for the input port by the conversion signal optical polarization controller
The conversion signal light is received, the polarization state of the conversion signal light is adjusted.
Optical signal add-drop multiplexer with reference to described in first aspect, in the 5th kind of possible implementation, the second order
Non-linear optical waveguide includes lithium niobate fiber waveguide.
Optical signal add-drop multiplexer with reference to described in first aspect, in the 6th kind of possible implementation, the input
Optical coupling unit, including input signal light control module, continuous pumping light generation module, at least one pulse pumping
Light generation module and the first photo-coupler；
First photo-coupler includes at least three input ports and an output port, wherein the input signal light
The output port of control module, continuous pumping light generation module and at least one pulse pumping light generation module is respectively connecting to institute
An input port of the first photo-coupler is stated, the output port of first photo-coupler is connected to the second nonlinear light
Waveguide；
The input signal light control module, for receiving institute by the input port of the input signal light control module
Input signal light is stated, and is exported after polarization state adjustment is carried out to the input signal light to first photo-coupler；
The continuous pumping light generation module, for producing continuous pumping light, and in the polarization to the continuous pumping light
Exported after state adjustment to first photo-coupler；
The pulse pumping light generation module, for producing pulse pumping light, adjusts the pulse pumping light in time domain
The time slot subchannel of the correspondence lower road flashlight in the input signal light is directed at, and in the polarization to the pulse pumping light
Exported after state adjustment to first photo-coupler；
First photo-coupler, receives the input signal light control module, continuous pumping light generation module and pulse
The input signal light, continuous pumping light and at least pulse pumping light, and will be described defeated all the way of pumping light generation module output
Enter flashlight, continuous pumping light and at least pulse pumping optical coupling is exported to the second nonlinear fiber waveguide all the way.
Optical signal add-drop multiplexer with reference to described in the 6th kind of possible mode of first aspect, in the 7th kind of possible realization
In mode, the input signal light control module, including input signal optical polarization controller, the input signal light Polarization Control
The output port of device is connected to an input port of first photo-coupler；
The input signal optical polarization controller, connects for the input port by the input signal optical polarization controller
The input signal light is received, the polarization state of the input optical signal is adjusted.
Optical signal add-drop multiplexer with reference to described in the 6th kind of possible mode of first aspect, in the 8th kind of possible realization
In mode, the continuous pumping light generation module, including first laser device and continuous pumping optical polarization controller；
The output port of the first laser device is connected to the input port of the continuous pumping optical polarization controller, described
The output port of continuous pumping optical polarization controller is connected to an input port of first photo-coupler；
The first laser device produces continuous pumping light；
The continuous pumping optical polarization controller, connects for the input port by the continuous pumping optical polarization controller
The continuous pumping light is received, the polarization state of the continuous pumping light is adjusted.
Optical signal add-drop multiplexer with reference to described in the 6th kind of possible mode of first aspect, in the 9th kind of possible realization
In mode, the pulse pumping light generation module, including second laser, the first adjustable optical delay line and pulse pumping light polarization
Controller；
The output port of the second laser is connected to the input port of the described first adjustable optical delay line, described first
The output port of adjustable optical delay line is connected to the input port of the pulse pumping optical polarization controller, the pulse pumping light
The output port of Polarization Controller is connected to an input port of first photo-coupler；
The second laser, for producing pulse pumping light；
The first adjustable optical delay line, for receiving the arteries and veins by the input port of the described first adjustable optical delay line
Pumping light is rushed, and adjusts the pulse pumping light correspondence lower road flashlight in the input signal light is extremely directed in time domain
Time slot subchannel；
The pulse pumping optical polarization controller, for being received by the pulse pumping optical polarization controller input port
The pulse pumping light, adjusts the polarization state of the pulse pumping light.
Optical signal add-drop multiplexer with reference to described in first aspect, in the tenth kind of possible implementation, the output
Optical coupling unit includes, and the second photo-coupler, at least one lower road signal tunable optical filter and a conversion signal light are adjustable
Optical filter；
Second photo-coupler includes an input port and at least two output ports, wherein second optical coupling
The output port of device is respectively connecting to the input port and conversion signal light of at least one lower road signal tunable optical filter
The input port of tunable optical filter, the input port of second photo-coupler is connected with the second nonlinear fiber waveguide；
Second photo-coupler, the conversion signal light and institute are received by the input port of second photo-coupler
At least idle signal light all the way is stated, by the conversion signal light and described at least idle signal light output to the lower road is believed all the way
Number tunable optical filter and conversion signal light tunable optical filter；
The lower road signal tunable optical filter, institute is received by the input port of the lower road signal tunable optical filter
State conversion signal light and at least idle signal light all the way, and obtain at least idle signal light all the way therein, will described in extremely
Few idle signal light all the way as at least descending output port of the road flashlight in the lower road flashlight tunable optical filter all the way
Output；
The conversion signal light tunable optical filter, is connect by the input port of the conversion signal light tunable optical filter
The conversion signal light and at least idle signal light, and obtain the conversion signal light therein all the way are received, the conversion is believed
Number light is exported in the output port of the conversion signal light tunable optical filter.
Second aspect there is provided a kind of optical signal processing method, including：Optical signal add-drop multiplexer receives input signal all the way
Light, and continuous pumping light all the way and at least pulse pumping light all the way are generated, adjust the pulse pumping light and the pulse is taken out
Fortune light is directed at the time slot subchannel of the correspondence lower road flashlight in the input signal light in time domain, and the input is believed
Number light, continuous pumping light and pulse pumping light are placed in identical polarization state；
The optical signal add-drop multiplexer is by the input signal light time slot subchannel of the pulse pumping optical registration
Information be transferred to the pulse pumping light, and by the pulse pumping with the information in the input signal light time slot subchannel
Light is converted to idle signal light after being adjusted by the continuous pumping light and is used as lower road signal light output；
The optical signal add-drop multiplexer will correspond to the pulse by the pulse pumping light on the input signal light
Consumption of information in pumping light time slot subchannel is fallen, by gap subchannel when the pulse pumping light is corresponded on the input signal light
On consumption of information after input signal light be used as conversion signal light output.
With reference to second aspect, in the first possible implementation, the optical signal processing method also includes：
The optical signal add-drop multiplexer receives at least road flashlight and the conversion signal light on the way, regulation it is described to
Few road flashlight on the way causes described when at least road flashlight is directed at the free time of the conversion signal light in time domain on the way
Gap subchannel, and by the conversion signal light and at least road flashlight is placed in identical polarization state on the way；
At least road flashlight is coupled to work after the conversion signal light to the optical signal add-drop multiplexer on the way by described in
For output signal light output.
Embodiments of the invention provide a kind of optical signal add-drop multiplexer and optical signal processing method, pass through second nonlinear
The effect that fiber waveguide parameter is decayed and wavelength convert is combined, is realized in full optical time domain on optical signal add-drop multiplexer to light
Signal is handled, and improves the speed at network node to optical signal prosessing and flexibility.
Brief description of the drawings
Fig. 1 is a kind of structural representation of optical signal add-drop multiplexer provided in an embodiment of the present invention；
A kind of structural representation for optical signal add-drop multiplexer that Fig. 2 provides for another embodiment of the present invention；
Fig. 3 is a kind of device connection diagram of optical signal add-drop multiplexer provided in an embodiment of the present invention；
A kind of device connection diagram for optical signal add-drop multiplexer that Fig. 4 provides for another embodiment of the present invention；
Fig. 5 is a kind of principle schematic of optical signal processing method provided in an embodiment of the present invention；
Fig. 6 is a kind of another principle schematic of optical signal processing method provided in an embodiment of the present invention；
Fig. 7 is a kind of another principle schematic of optical signal add-drop multiplexer provided in an embodiment of the present invention；
The structural representation for another optical signal add-drop multiplexer that Fig. 8 provides for another embodiment of the present invention；
The principle schematic for another optical signal add-drop multiplexer that Fig. 9 provides for another embodiment of the present invention；
Figure 10 is a kind of schematic flow sheet of optical signal processing method provided in an embodiment of the present invention；
A kind of schematic flow sheet for optical signal processing method that Figure 11 provides for another embodiment of the present invention.
Embodiment
The embodiments of the invention provide a kind of optical signal add-drop multiplexer and optical signal processing method, applied to network node
The optical signal prosessing at place, wherein optical signal add-drop multiplexer include an input port, output port, at least one lower road
Port and road port at least one.In optical-fiber network, it can be inserted at the node for needing to carry out local reception using optical signal point
Multiplexer inputs the input signal light for including n time slot subchannel from input port, and is selectively exported from lower road port
Lower road flashlight comprising required time slot subchannel；It can also be believed at the node for needing to carry out local data output by light
Some upper road signal light multiplexings to input signal light will particularly be needed to send by number add-drop multiplexer from the input of upper road port
This ground road flashlight, believe other in input signal light with local unrelated time slot subchannel and upper road flashlight time slot
Road is exported after being multiplexed together as output signal light from the output port of optical signal add-drop multiplexer, realizes that dividing for optical signal inserts
Multiplexing.
Specifically, the embodiment of the present invention provides a kind of optical signal add-drop multiplexer, shown in reference picture 1, optical signal point is inserted multiple
Include input optical coupling unit 11, second nonlinear fiber waveguide 12 and output optical coupling unit 13 with device 1.Input optical coupling unit
11 connection second nonlinear fiber waveguides 12, the connection output optical coupling unit 13 of second nonlinear fiber waveguide 12.
Wherein, input optical coupling unit 11 is used to receiving input signal light all the way, and produces continuous pumping light all the way and extremely
Few pulse pumping light all the way, and by the input signal light, continuous pumping light and at least pulse pumping light couples input together all the way
Second nonlinear fiber waveguide 12.
Second nonlinear fiber waveguide 12 receives the input signal light, continuous pumping light and at least pulse pumping light all the way, and
Input signal light and at least pulse pumping light are converted into conversion signal light, by continuous pumping light, input signal light and at least one
Road pulse pumping light is converted at least idle signal light all the way, and by the conversion signal light and at least idle signal light output all the way
To output optical coupling unit 13.
Export optical coupling unit 13 and receive conversion signal light and at least idle signal light, and this is at least idle all the way all the way
Flashlight as road signal light output is at least descended all the way, by conversion signal light output.
Wherein, second nonlinear fiber waveguide 12 can for lithium niobate fiber waveguide and other there is the light of second order nonlinear effect
Waveguide.
The optical signal add-drop multiplexer that embodiments of the invention are provided, passes through the decay of second nonlinear fiber waveguide parameter and ripple
The effect that long conversion is combined, realizes on optical signal add-drop multiplexer and optical signal is handled in full optical time domain, improves
Speed and flexibility at network node to optical signal prosessing.
Further, correspondence local data output, by optical signal add-drop multiplexer by some upper road signal light multiplexings extremely
The scene of input signal light, shown in reference picture 2, optical signal add-drop multiplexer 1 provided in an embodiment of the present invention also includes：Output letter
Number optical multiplex unit 14, connection output optical coupling unit 13, for receiving at least road flashlight and output optical coupling list on the way
Member 13 output conversion signal light, will at least on the way road flashlight be coupled to conversion signal light after it is defeated as output signal light
Go out.
So, the optical signal add-drop multiplexer that optical network node is provided by said apparatus embodiment can not only be obtained down
Road flashlight, additionally it is possible to by upper road signal light multiplexing to input signal light, so as to realize the add drop multiplex of optical-fiber network.
Specifically, optical signal add-drop multiplexer provided in an embodiment of the present invention, shown in reference picture 3, optical signal add drop multiplex
Device 1 includes input optical coupling unit 11, second nonlinear fiber waveguide 12 and output optical coupling unit 13, inputs optical coupling unit 11
Connect second nonlinear fiber waveguide 12, the connection output optical coupling unit 13 of second nonlinear fiber waveguide 12.Wherein, optical coupling is inputted
Unit 11 includes：
One input signal light control module 112, continuous pumping light generation module 114, at least one pulse pumping
Light generation module (this is illustrated exemplified by sentencing pulse pumping light generation module 113) and the first photo-coupler 111, the first optocoupler
Clutch 111 includes at least three input ports and an output port, wherein input signal light control module 112, continuous pumping
The output port of light generation module 114 and pulse pumping light generation module 113 is respectively connecting to one of the first photo-coupler 111
Input port, the output port of the first photo-coupler 111 is connected to second nonlinear fiber waveguide 12.
Input signal light control module 112 is used to receive input by the input port of input signal light control module 112
Optical signal, and exported after polarization state adjustment is carried out to input optical signal to the first photo-coupler 111；
Specifically, input signal light control module 112, including input signal optical polarization controller 1121, input signal light
The output port of Polarization Controller 1121 is connected to an input port of the first photo-coupler 111；
Input signal optical polarization controller 1121, receives defeated by the input port of input signal optical polarization controller 1121
Enter flashlight, adjust the polarization state of input optical signal.
Continuous pumping light generation module 114 is used to produce continuous pumping light, and in the polarization state adjustment to continuous pumping light
After export to the first photo-coupler 111；
Specifically, continuous pumping light generation module 114, including first laser device 1142 and continuous pumping optical polarization controller
1141；
The output port of first laser device 1142 is connected to the input port of continuous pumping optical polarization controller 1141, continuously
The output port of pumping optical polarization controller 1141 is connected to an input port of the first photo-coupler 111；
First laser device 1142 produces continuous pumping light.
Continuous pumping optical polarization controller 1141, connects for the input port by continuous pumping optical polarization controller 1141
Continuous pumping light is received, the polarization state of continuous pumping light is adjusted.
Pulse pumping light generation module 113, for producing pulse pumping light, adjustment pulse pumping light is directed at defeated in time domain
Enter the time slot subchannel of the lower road flashlight of correspondence in flashlight, and exported after being adjusted to the polarization state of pulse pumping light to first
Photo-coupler 111；
Specifically, pulse pumping light generation module 113, including second laser 1133, the first adjustable optical delay line 1132
And pulse pumping optical polarization controller 1131；
Wherein, second laser 1133 is connected to the input port of the first adjustable optical delay line 1132, and the first tunable optical is prolonged
When line 1132 output port be connected to the input port of pulse pumping optical polarization controller 1131, the control of pulse pumping light polarization
The output port of device 1131 is connected to an input port of the first photo-coupler 111；
Second laser 1133, produces pulse pumping light；
First adjustable optical delay line 1132, by the input port of the first adjustable optical delay line 1132, receives pulse pumping
Light, and pulse pumping light is adjusted to the time slot subchannel that road signal under correspondence in input signal light is directed in time domain；
Pulse pumping optical polarization controller 1131, arteries and veins is received by the input port of pulse pumping optical polarization controller 1131
Pumping light is rushed, the polarization state of pulse pumping light is adjusted.
First photo-coupler 111, receives input signal light control module 112, continuous pumping light generation module 114 and pulse
Pumping light generation module 113 export input signal light, continuous pumping light and pulse pumping light, and by the input signal light, even
Continuous pumping light and pulse pumping optical coupling are exported to second nonlinear fiber waveguide 12.
Second nonlinear fiber waveguide 12 receives the input signal light, continuous pumping light and pulse pumping light, and input is believed
Number light is converted into conversion signal light with pulse pumping light, and continuous pumping light, input signal light and pulse pumping light are converted into sky
Not busy flashlight, and the conversion signal light and idle signal light output are extremely exported into optical coupling unit 13；
Shown in reference picture 5 and Fig. 6, specifically, in second nonlinear fiber waveguide 12, input signal light wavelength is taken out with pulse
Transport approximate QPM (Quasi phase matching, the quasi-phase matched) wavelength pair on second nonlinear fiber waveguide of optical wavelength
Claim, occur cascaded second-order nonlinear interaction, input signal light λSPhoton and pulse pumping light λP1Photon with frequency during bury in oblivion
To produce and frequency light photon, continuous pumping light λP2Photon is adjusted and frequency light photon produces idle signal light λ by difference frequency processiLight
Son, in this process, wavelength convert, which is acted on, causes the information on input signal light time slot subchannel i, j and k to be transferred to the free time
Pumping light λiOutput, input signal light λSUpper respective pulses pumping light λP1Consumption of information on time slot subchannel i, j and k is made after falling
For conversion signal light output.
Optical coupling unit 13 is exported, conversion signal light and idle signal light is received, specifically, output optical coupling unit 13 is wrapped
Include, the second photo-coupler 131, at least one lower road flashlight tunable optical filter (road flashlight tunable optical filtering herein below
Illustrated exemplified by device 1301) and a conversion signal light tunable optical filter 1302.Second photo-coupler 131 is defeated including one
Inbound port and at least two output ports, wherein to be respectively connecting to lower road signal adjustable for the output port of the second photo-coupler 131
The input port of optical filter 1301 and the input port of conversion signal light tunable optical filter 1302, the second photo-coupler 131
Input port be connected with second nonlinear fiber waveguide 12.
Wherein, the second photo-coupler 131, conversion signal light and sky are received by the input port of the second photo-coupler 131
Not busy flashlight, can by conversion signal light and idle signal light output to lower road signal tunable optical filter 1301 and conversion signal light
Dim wave filter 1302.
Lower road flashlight tunable optical filter 1301, is connect by the input port of lower road flashlight tunable optical filter 1301
Conversion signal light and idle signal light are received, and obtains idle signal light therein, the idle signal light is regard as lower road flashlight
Exported in the output port of lower road flashlight tunable optical filter 1301；
Conversion signal light tunable optical filter 1302, is connect by the input port of conversion signal light tunable optical filter 1302
Receive conversion signal light and idle signal light and obtain conversion signal light therein, the conversion signal light is adjustable in conversion signal light
The output port output of optical filter 1302.
Use just can be realized by inputting optical coupling unit 11, second nonlinear fiber waveguide 12 and output optical coupling unit 13
Family equipment carries out the function of local reception by network node from optical-fiber network.
Optionally, when needing to carry out local data output, optical signal add-drop multiplexer is by some upper road signal light multiplexings
To input signal light, the optical signal add/drop multiplexer that now embodiments of the invention are provided, shown in reference picture 4, in addition to output
Signal optical multiplex unit 14.Output signal optical multiplex unit 14 is including road signal Optical Receivers at least one (more than herein
Illustrated exemplified by road signal Optical Receivers 142), a photo-coupler 141 of conversion signal Optical Receivers 143 and the 3rd,
3rd photo-coupler 141 includes at least two input ports and an output port.
Upper road signal Optical Receivers 142 is connected to an input port of the 3rd photo-coupler 141, for passing through upper road
The input port of signal Optical Receivers 142 receives upper road flashlight；
Specifically, upper road signal Optical Receivers 142 includes the second adjustable optical delay line 1421 and upper road signal light polarization
Controller 1422, the output port of the second adjustable optical delay line 1421 is connected to the input of road signal optical polarization controller 1422
Port, the output port of upper road signal optical polarization controller 1422 is connected to an input port of the 3rd photo-coupler 141；
Second adjustable optical delay line 1421 is used to receive upper road letter by the input port of the second adjustable optical delay line 1421
Number light, and upper road flashlight is adjusted to the free timeslot subchannel of the alignment conversion signal light in time domain；
Upper road signal optical polarization controller 1422, the polarization state for adjusting upper road information light.
Conversion signal Optical Receivers 143 is connected to an input port of the 3rd coupler 141, for being believed by changing
The input port of number Optical Receivers 143 receives the conversion signal light of the output of output signal optical multiplex unit 13；
Specifically, conversion signal Optical Receivers 143 includes conversion signal optical polarization controller 1431, conversion signal light is inclined
Shake controller 1431 input port connection output optical coupling unit 13, the output port of conversion signal optical polarization controller 1431
It is connected to an input port of the 3rd coupler 141；
Conversion signal optical polarization controller 1431 is received by the input port of conversion signal optical polarization controller 1431 to be turned
Flashlight is changed, the polarization state of conversion signal light is adjusted.
3rd photo-coupler 141 is used for the upper road optical signal for receiving upper road signal Optical Receivers 142 coupled to conversion
Output signal light output is used as after the conversion signal light that signal Optical Receivers 143 is received.
It just can realize that user equipment enters line number by network node to optical-fiber network by output signal optical multiplex unit 14
According to the function of output.
The optical signal add-drop multiplexer that embodiments of the invention are provided, passes through the decay of second nonlinear fiber waveguide parameter and ripple
The effect that long conversion is combined, realizes on optical signal add-drop multiplexer and optical signal is handled in full optical time domain, improves
Speed and flexibility at network node to optical signal prosessing.
Optical signal add-drop multiplexer provided in an embodiment of the present invention, realizes and optical signal is handled in full optical time domain,
Specifically, the optical signal add-drop multiplexer shown in reference picture 4, its specific signal transacting schematic diagram is as shown in Figure 7：
Wherein, time slot subchannel i, j and k in input signal light are the corresponding time slot subchannel of lower road flashlight, upper road
Flashlight and lower road flashlight can be for all the way, or multichannel, this sentences road flashlight on the way and descends road signal all the way
Illustrated exemplified by light；
Optical coupling unit 11 is inputted, input signal light is received, continuous pumping light and pulse pumping light is produced, wherein, pulse
Pumping light is directed at time slot subchannel i, j and k in input signal light in time domain, and by input signal light and continuous pumping light and
Pulse pumping light is placed in after same polarization state, together coupling input second nonlinear fiber waveguide 12.
Second nonlinear fiber waveguide 12 receives the input signal light, continuous pumping light and pulse pumping light and by input signal
Information on light time gap subchannel i, j and k is transferred to pulse pumping light, and will carry input signal light time slot subchannel i, j and k
On information pulse pumping light adjusted by continuous pumping light after be converted to and be used as idle signal light output to exporting optical coupling
Unit 13；Optical coupling list is extremely exported using the input signal light of the information with other time slot subchannels as conversion signal light output
Member 13, now no information on gap subchannel i, j and k during conversion signal light.
The operation principle of wherein second nonlinear fiber waveguide 12 can be found in the corresponding embodiments of above-mentioned Fig. 5 and Fig. 6, here not
Repeat again.
Optical coupling unit 13 is exported, the conversion signal light and idle signal light is received, and using the idle signal light under
Road signal light output, by conversion signal light output, wherein the information on lower road flashlight time slot subchannel i, j and k is optical signal
Add-drop multiplexer carries out the information of local reception.
Optionally, the conversion letter that road flashlight and output optical coupling unit 13 are exported in signal optical multiplex unit 14, reception
Number light, road flashlight time slot subchannel i, j and k carry out the information of local data output comprising optical signal add-drop multiplexer on this；
Signal optical multiplex unit 14, gap is believed when the information on upper road flashlight time slot subchannel i, j and k is coupled into conversion signal light
Output signal light output is used as after road i, j and k.
Optionally, shown in reference picture 8 and Fig. 9, the pulse pumping light generation module (113,115) of optical coupling unit 11 is inputted
It can be one, or multiple, each pulse pumping light generation module (113,115) produces pulse pumping light all the way；It is defeated
The lower road flashlight tunable optical filter (1301,1303) for going out optical coupling unit 13 can be one, or multiple, each
Lower road flashlight tunable optical filter (1301,1303) filters out descends road flashlight all the way, wherein, the letter under every road on the flashlight of road
Breath can be the information in information or identical time slot subchannel in different time-gap subchannel；Output signal light multiplexing
The upper road signal Optical Receivers (142,144) of unit 14 can be one, or multiple, each upper road signal light-receiving
Module receives road flashlight on the way, can not be identical per the time slot subchannel of Lu Shanglu flashlights；
The embodiment of the present invention is by inputting optical coupling unit 11, second nonlinear fiber waveguide 12, output optical coupling unit 13
And output signal optical multiplex unit 14 just can realize that multi-user installation carries out local reception by network node, lower road letter is obtained
The function of road flashlight, realizes the add drop multiplex of optical-fiber network in function and the local data output of number light, output.
The embodiment of the present invention also provides a kind of optical signal processing method, the optical signal provided applied to said apparatus embodiment
Add-drop multiplexer, shown in reference picture 10, is specifically included：
1101st, optical signal add-drop multiplexer receives input signal light all the way, produces continuous pumping light all the way and at least all the way
Pulse pumping light；
1102nd, optical signal add-drop multiplexer regulation pulse pumping light causes pulse pumping light to be directed at input signal in time domain
The time slot subchannel of the lower road flashlight of correspondence in light；
1103rd, input signal light, continuous pumping light and pulse pumping light are placed in identical polarization by optical signal add-drop multiplexer
State；
1104a, optical signal add-drop multiplexer are by the information in the input signal light time slot subchannel of pulse pumping optical registration
Pulse pumping light is transferred to, and the pulse pumping light with the information in input signal light time slot subchannel is passed through into continuous pumping
Idle signal light is converted to as lower road signal light output after light regulation；
1104b, optical signal add-drop multiplexer are by pulse pumping light by respective pulses pumping light time slot on input signal light
Consumption of information in subchannel is fallen, will be defeated after the consumption of information on input signal light in respective pulses pumping light time slot subchannel
Enter flashlight as conversion signal light output.
By optical signal processing method provided in an embodiment of the present invention, network node can be carried by said apparatus embodiment
The optical signal add-drop multiplexer of confession realizes that multi-user installation carries out local reception by network node from optical-fiber network, obtains lower road letter
The function of number light.
Optical signal processing method and optical signal add-drop multiplexer provided in an embodiment of the present invention, passes through second nonlinear light wave
The effect that parameter decay and wavelength convert are combined is led, the add drop multiplex signal of optical-fiber network is realized on optical signal add-drop multiplexer
The processing of full optical time domain, improve speed and the flexibility of optical signal prosessing at network node.
The embodiment of the present invention also provides a kind of optical signal processing method, the light provided applied to above-mentioned another device embodiment
Signal add-drop multiplexer, shown in reference picture 11, is specifically included：
1201st, optical signal add-drop multiplexer receives input signal light all the way, produces continuous pumping light all the way and at least all the way
Pulse pumping light；
1202nd, optical signal add-drop multiplexer regulation pulse pumping light causes pulse pumping light to be directed at input signal in time domain
The time slot subchannel of the lower road flashlight of correspondence in light；
1203rd, input signal light, continuous pumping light and pulse pumping light are placed in identical polarization by optical signal add-drop multiplexer
State；
1204a, optical signal add-drop multiplexer are by the information in the input signal light time slot subchannel of pulse pumping optical registration
Pulse pumping light is transferred to, and the pulse pumping light with the information in input signal light time slot subchannel is passed through into continuous pumping
Idle signal light is converted to as lower road signal light output after light regulation；
1204b, optical signal add-drop multiplexer are by pulse pumping light by respective pulses pumping light time slot on input signal light
Consumption of information in subchannel is fallen, will be defeated after the consumption of information on input signal light in respective pulses pumping light time slot subchannel
Enter flashlight as conversion signal light output；
1204c, optical signal add-drop multiplexer receive at least road flashlight on the way；
1205th, the upper road flashlight of optical signal add-drop multiplexer regulation causes road flashlight to be directed at conversion signal in time domain
The free timeslot subchannel of light；
1206th, conversion signal Guang Jishang roads flashlight is placed in identical polarization state by optical signal add-drop multiplexer；
1207th, upper road flashlight is coupled to defeated as output signal light after conversion signal light by optical signal add-drop multiplexer
Go out.
By optical signal processing method provided in an embodiment of the present invention, network node can be carried by said apparatus embodiment
The optical signal add-drop multiplexer of confession realizes that multi-user installation carries out local reception by network node from optical-fiber network, obtains lower road letter
The function of road flashlight, realizes the add drop multiplex of optical-fiber network in function and the local data output of number light, output.
Optical signal add-drop multiplexer and optical signal processing method provided in an embodiment of the present invention, pass through second nonlinear light wave
The effect that parameter decay and wavelength convert are combined is led, the add drop multiplex signal of optical-fiber network is realized on optical signal add-drop multiplexer
The processing of full optical time domain, improve speed and the flexibility of optical signal prosessing at network node.
Claims (13)
1. a kind of optical signal add-drop multiplexer, it is characterised in that including input optical coupling unit, second nonlinear fiber waveguide and defeated
Go out optical coupling unit；
The input optical coupling unit connects the second nonlinear fiber waveguide, and the second nonlinear fiber waveguide connection is described defeated
Go out optical coupling unit；
Wherein described input light coupling unit, receives input signal light all the way, and produces continuous pumping light all the way and at least all the way
Pulse pumping light, and by the input signal light and continuous pumping light all the way and at least input is coupled together with pulse pumping light all the way
The second nonlinear fiber waveguide；
The second nonlinear fiber waveguide, receives the input signal light, continuous pumping light and at least pulse pumping light all the way, and
By the input signal light with it is described at least pulse pumping light is converted into conversion signal light all the way, by the input signal light, institute
State at least that pulse pumping light and the continuous pumping light are converted at least idle signal light all the way all the way, and by the conversion signal
Light and it is described at least all the way idle signal light output to the output optical coupling unit；
The output optical coupling unit, receives at least idle signal light and the conversion signal light, and at least one described in general all the way
Road idle signal light as road signal light output is at least descended all the way, by the conversion signal light output.
2. optical signal add-drop multiplexer according to claim 1, it is characterised in that also include：Output signal light multiplexing list
Member, connects the output optical coupling unit, receives the institute that at least road flashlight and the output optical coupling unit are exported on the way
State conversion signal light, will it is described at least on the way road flashlight coupled to defeated as output signal light after the conversion signal light
Go out.
3. optical signal add-drop multiplexer according to claim 2, it is characterised in that the output signal optical multiplex unit,
Including：
Road signal Optical Receivers, a conversion signal Optical Receivers and the 3rd photo-coupler, the described 3rd at least one
Photo-coupler includes at least two input ports and an output port；
The upper road signal Optical Receivers is connected to an input port of the 3rd photo-coupler, is believed by the upper road
The input port of number Optical Receivers receives upper road flashlight；
The conversion signal Optical Receivers is connected to an input port of the 3rd photo-coupler, is believed by the conversion
The input port of number Optical Receivers receives the conversion signal light of the output signal optical multiplex unit output；
The upper road optical signal that 3rd photo-coupler receives signal Optical Receivers in road at least one turns coupled to described
Change after the conversion signal light of signal Optical Receivers reception as output signal light output.
4. optical signal add-drop multiplexer according to claim 3, it is characterised in that the upper road signal Optical Receivers,
Including the second adjustable optical delay line and upper road signal optical polarization controller；
The output port of the second adjustable optical delay line is connected to the input port of the upper road signal optical polarization controller, institute
The output port of Shu Shang roads signal optical polarization controller is connected to an input port of the 3rd photo-coupler；
The second adjustable optical delay line, the upper road signal is received by the input port of the described second adjustable optical delay line
Light, and the upper road flashlight is adjusted to the free timeslot subchannel that the conversion signal light is directed in time domain；
The upper road signal optical polarization controller, adjusts the polarization state of the upper road flashlight.
5. optical signal add-drop multiplexer according to claim 3, it is characterised in that the conversion signal Optical Receivers,
Including conversion signal optical polarization controller,
The input port of the conversion signal optical polarization controller connects the output optical coupling unit, and the conversion signal light is inclined
The output port of controller of shaking is connected to an input port of the 3rd photo-coupler；
The conversion signal optical polarization controller, for receiving institute by the input port of the conversion signal optical polarization controller
Conversion signal light is stated, the polarization state of the conversion signal light is adjusted.
6. optical signal add-drop multiplexer according to claim 1, it is characterised in that：
The second nonlinear fiber waveguide includes lithium niobate fiber waveguide.
7. optical signal add-drop multiplexer according to claim 1, it is characterised in that the input optical coupling unit, including one
Individual input signal light control module, continuous pumping light generation module, at least one pulse pumping light generation module and first
Photo-coupler；
First photo-coupler includes at least three input ports and an output port, wherein the input signal light is controlled
The output port of module, continuous pumping light generation module and at least one pulse pumping light generation module is respectively connecting to described
One input port of one photo-coupler, the output port of first photo-coupler is connected to the second nonlinear light wave
Lead；
The input signal light control module, receives described defeated for the input port by the input signal light control module
Enter flashlight, the input signal light is exported to first photo-coupler after carrying out polarization state adjustment；
The continuous pumping light generation module, for producing continuous pumping light, and in the polarization state tune to the continuous pumping light
Exported after whole to first photo-coupler；
The pulse pumping light generation module, for producing pulse pumping light, adjusts the pulse pumping light and is aligned in time domain
The time slot subchannel of the correspondence lower road flashlight in the input signal light, and in the polarization state tune to the pulse pumping light
Exported after whole to first photo-coupler；
First photo-coupler, receives the input signal light control module, continuous pumping light generation module and pulse pumping
The input signal light, continuous pumping light and at least pulse pumping light all the way, and the input is believed of light generation module output
Number light, continuous pumping light and at least pulse pumping optical coupling is exported to the second nonlinear fiber waveguide all the way.
8. optical signal add-drop multiplexer according to claim 7, it is characterised in that the input signal light control module,
Including input signal optical polarization controller；
The output port of the input signal optical polarization controller is connected to an input port of first photo-coupler；
The input signal optical polarization controller, for receiving institute by the input port of the input signal optical polarization controller
Input signal light is stated, the polarization state of the input signal light is adjusted.
9. optical signal add-drop multiplexer according to claim 7, it is characterised in that the continuous pumping light generation module, bag
Include first laser device and continuous pumping optical polarization controller；
The output port of the first laser device is connected to the input port of the continuous pumping optical polarization controller, described continuous
The output port of pumping optical polarization controller is connected to an input port of first photo-coupler；
The first laser device produces continuous pumping light；
The continuous pumping optical polarization controller, for receiving institute by the input port of the continuous pumping optical polarization controller
Continuous pumping light is stated, the polarization state of the continuous pumping light is adjusted.
10. optical signal add-drop multiplexer according to claim 7, it is characterised in that the pulse pumping light generation module,
Including second laser, the first adjustable optical delay line and pulse pumping optical polarization controller；
The output port of the second laser is connected to the input port of the described first adjustable optical delay line, and described first is adjustable
The output port of optical delay line is connected to the input port of the pulse pumping optical polarization controller, the pulse pumping light polarization
The output port of controller is connected to an input port of first photo-coupler；
The second laser, for producing pulse pumping light；
The first adjustable optical delay line, receives the pulse for the input port by the described first adjustable optical delay line and takes out
Transport light, and adjust the pulse pumping light to be aligned in time domain in the input signal light correspondence lower road flashlight when
Gap subchannel；
The pulse pumping optical polarization controller, for receiving described by the pulse pumping optical polarization controller input port
Pulse pumping light, adjusts the polarization state of the pulse pumping light.
11. optical signal add-drop multiplexer according to claim 1, it is characterised in that the output optical coupling unit includes,
Second photo-coupler, at least one lower road signal tunable optical filter and a conversion signal light tunable optical filter；
Second photo-coupler includes an input port and at least two output ports, wherein second photo-coupler
The input port and conversion signal light that output port is respectively connecting at least one lower road signal tunable optical filter are adjustable
The input port of optical filter, the input port of second photo-coupler is connected with the second nonlinear fiber waveguide；
Second photo-coupler, by the input port of second photo-coupler receive the conversion signal light and it is described extremely
Few idle signal light all the way, by the conversion signal light and described at least idle signal light output to the lower road signal can all the way
Dim wave filter and conversion signal light tunable optical filter；
The lower road signal tunable optical filter, described turn is received by the input port of the lower road signal tunable optical filter
Change flashlight and at least idle signal light all the way, and obtain at least idle signal light all the way therein, will described at least one
Road idle signal light as at least descend all the way road flashlight the lower road flashlight tunable optical filter output port export；
The conversion signal light tunable optical filter, institute is received by the input port of the conversion signal light tunable optical filter
Conversion signal light and at least idle signal light, and obtain the conversion signal light therein all the way are stated, by the conversion signal light
Exported in the output port of the conversion signal light tunable optical filter.
12. a kind of optical signal processing method, it is characterised in that including：
Optical signal add-drop multiplexer receives input signal light all the way, and generates continuous pumping light all the way and at least pulse pumping all the way
Light, adjusts the pulse pumping light and make it that described at least pulse pumping light is directed at right in the input signal light in time domain all the way
The time slot subchannel of Ying Xia roads flashlight, and by the input signal light, continuous pumping light and at least pulse pumping light is put all the way
In identical polarization state；
The optical signal add-drop multiplexer is by the letter in the input signal light time slot subchannel of the pulse pumping optical registration
Breath is transferred to the pulse pumping light, and the pulse pumping light with the information in the input signal light time slot subchannel is led to
Idle signal light is converted to as lower road signal light output after crossing the continuous pumping light regulation；
The optical signal add-drop multiplexer will correspond to the pulse pumping by the pulse pumping light on the input signal light
Consumption of information in light time gap subchannel is fallen, by the input signal light correspondence pulse pumping light when gap subchannel on
Input signal light after consumption of information is used as conversion signal light output.
13. optical signal processing method according to claim 12, it is characterised in that methods described also includes：
The optical signal add-drop multiplexer receives at least road flashlight and the conversion signal light on the way, at least one described in regulation
Lu Shanglu flashlights make it that described at least road flashlight is directed at free timeslot of the conversion signal light in time domain on the way
Channel, and the conversion signal Guang Jishang roads flashlight is placed in identical polarization state；
At least road flashlight is coupled to after the conversion signal light as defeated the optical signal add-drop multiplexer on the way by described in
Go out signal light output.
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| CN201310182512.XA CN104166291B (en) | 2013-05-16 | 2013-05-16 | A kind of optical signal add-drop multiplexer and optical signal processing method |
| PCT/CN2013/085329 WO2014183377A1 (en) | 2013-05-16 | 2013-10-16 | Optical signal add-drop multiplexer and optical signal processing method |
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| CA2357017A1 (en) * | 1998-12-24 | 2000-07-06 | Optical Technologies Italia S.P.A. | Acousto-optical device |
| WO2002075410A1 (en) * | 2001-03-19 | 2002-09-26 | Capella Photonics, Inc. | Reconfigurable optical add-drop multiplexers |
| US7236704B1 (en) * | 2001-11-14 | 2007-06-26 | Avanex Corporation | Optical add/drop multiplexer utilizing variable optical attenuator |
| CN100442137C (en) * | 2006-12-28 | 2008-12-10 | 华中科技大学 | All-optical code type conversion device based on nonlinear optical waveguide loop mirror |
| CN101464609B (en) * | 2009-01-08 | 2010-07-21 | 上海交通大学 | Production method of double-pump wavelength-adjustable broad band full-wavelength converter |
| US8909066B2 (en) * | 2010-11-30 | 2014-12-09 | Mitsubishi Electric Corporation | Optical transfer system, optical transmission device, and optical reception device |
| CN103023599A (en) * | 2011-09-20 | 2013-04-03 | 武汉邮电科学研究院 | Reconfigurable optical add-drop multiplexer and reconfigurable optical add-drop multiplexing method |
| CN102547492B (en) * | 2011-12-17 | 2014-06-04 | 华中科技大学 | All-optical information exchange method based on second order nonlinearity |
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| CN2500036Y (en) * | 2001-09-14 | 2002-07-10 | 华中科技大学 | Optical forking multiple device |
| CN1533080A (en) * | 2003-03-21 | 2004-09-29 | 华为技术有限公司 | Two-way add and drop multiplexer module |
| CN1764096A (en) * | 2005-10-26 | 2006-04-26 | 中山大学 | Optical add-drop multiplexer with adjustable wave length channel |
| EP2157715A1 (en) * | 2008-08-19 | 2010-02-24 | Danmarks Tekniske Universitet (DTU) | A method for equalization of transients in an input optical signal |
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