WO2014183377A1

WO2014183377A1 - Optical signal add-drop multiplexer and optical signal processing method

Info

Publication number: WO2014183377A1
Application number: PCT/CN2013/085329
Authority: WO
Inventors: 王健; 贺继方; 付红岩
Original assignee: 华为技术有限公司
Priority date: 2013-05-16
Filing date: 2013-10-16
Publication date: 2014-11-20
Also published as: CN104166291B; CN104166291A

Abstract

An optical signal add-drop multiplexer and an optical signal processing method. The optical signal add-drop multiplexer (1) comprises an input light coupling unit (11), a second-order nonlinear optical waveguide (12) and an output light coupling unit (13), wherein the input light coupling unit (11) receives input signal light and generates a path of continuous pumping light and at least one path of pulse pumping light. In the second-order nonlinear optical waveguide (12), the input signal light and the at least one path of pulse pumping light are converted into signal conversion light, and the input signal light, the at least one path of pulse pumping light, as well as the continuous pumping light are converted into at least one path of idle signal light. The output light coupling unit (13) outputs the at least one path of idle signal light as at least one path of drop signal light, and outputs the signal conversion light. By means of the effects of combining the parameter attenuation of the second-order nonlinear optical waveguide with the wavelength conversion, the optical signal add-drop multiplexer and the optical signal processing method realize the processing of optical signals in all-optical time domains and improve the speed and the flexibility of network nodes.

Description

Optical signal add/drop multiplexer and optical signal processing method The application is submitted to the Chinese Patent Office on May 16, 2013, and the application number is

The present invention relates to the field of optical network technology. The present invention relates to the field of optical network technology, the entire disclosure of which is incorporated herein by reference. In particular, it relates to an optical signal add/drop multiplexer and an optical signal processing method.

Background technique

WDM (wavelength division multiplexing) Optical network is an important application of optical network transmission. OADM (optical add/drop multiplexing optical add/drop multiplexing) technology is the main technology of high-speed all-optical signal processing at network nodes. OTDM (optical time division multiplexing) technology optical network uses time dimension to multiplex different time slot subchannels, which improves information capacity and becomes an important component of WDM optical network. As a key technology for all-optical signal processing, 0ADM technology is also an important supporting technology for all-optical communication networks, and plays an important role as a transportation hub in optical communication systems. Existing add/drop add/drop multiplex (0ADM) devices include a signal input port, a drop port, an add port, and an output port. The signal light comprises n wavelength channels, enters an input port of the optical add/drop add/drop multiplexer, and selectively outputs a desired wavelength channel from the nth wavelength channel from the n wavelength channels according to service requirements, correspondingly The uplink port inputs the required wavelength channel, and the other local-independent wavelength channels are multiplexed with the uplink wavelength channel and output from the output port of the optical add-drop multiplexer.

The existing signal processing scheme for the time domain subchannel is to first convert the optical signal into an electrical signal, process the corresponding time slot channel in the electrical signal, and then convert it into an optical signal output. In the process of implementing the above-mentioned optical signal processing for the time domain subchannel, the inventors have found that at least the following problems exist in the prior art: The signal processing scheme for the time domain subchannel is optical-electrical-optical electrical signal processing technology, information Processing is limited by the "electronic bottleneck", and the rate is low. In addition, due to the modulation and demodulation of the signal involved, the electrical signal processing is also modulated by the optical signal during photoelectric conversion or electro-optical conversion. The format is limited, so the flexibility of optical signal processing is poor.

Summary of the invention

Embodiments of the present invention provide an optical signal add/drop multiplexer and an optical signal processing method, which can implement all-optical time domain signal processing, and improve the rate and flexibility of optical signal processing at a network node. Embodiments of the present invention adopt the following technical solutions:

According to a first aspect, an optical signal add/drop multiplexer includes: an input optical coupling unit, a second-order nonlinear optical waveguide, and an output optical coupling unit; and the input optical coupling unit is coupled to the second-order nonlinear optical waveguide. The second-order nonlinear optical waveguide is connected to the output optical coupling unit;

The input optical coupling unit receives one input signal light, and generates one continuous pumping light and at least one pulse pumping light, and the input signal light is combined with one continuous pumping light and at least one pulse pumping light. Coupling input to the second-order nonlinear optical waveguide;

The second-order nonlinear optical waveguide receives the input signal light, the continuous pumping light, and the at least one pulse pumping light, and converts the input signal light and the at least one pulse pumping light into a converted signal light. Converting the input signal light, the at least one pulse pumping light, and the continuous pumping light into at least one idle signal light, and outputting the converted signal light and the at least one idle signal light to the output Optical coupling unit;

The output optical coupling unit receives the at least one idle signal light and the converted signal light, and outputs the at least one idle signal light as at least one downlink signal light, and outputs the converted signal light. With reference to the first aspect, in a first possible implementation, the optical signal add/drop multiplexer further includes: an output signal optical multiplexing unit, connected to the output optical coupling unit, and receiving at least one road signal light and a The converted signal light output by the output optical coupling unit is optically coupled to the converted signal light and output as an output signal light.

In combination with the optical signal add/drop multiplexer according to the first aspect of the first aspect, in the second possible implementation, the output signal optical multiplexing unit includes:

At least one uplink signal light receiving module, a switching signal light receiving module and a third optical coupler, the third optical coupler comprising at least two input ports and one output port; The uplink signal light receiving module is connected to an input port of the third optical coupler, and receives an uplink signal light through an input port of the uplink signal light receiving module; the conversion signal light receiving module is connected to the third An input port of the coupler receives the converted signal light output by the output signal optical multiplexing unit through an input port of the converted signal light receiving module;

The third optical coupler couples the uplink optical signal received by the at least one uplink signal light receiving module to the converted signal light received by the converted signal light receiving module as an output signal light output.

In combination with the optical signal add/drop multiplexer according to the first aspect of the first aspect, in a third possible implementation, the uplink signal light receiving module includes a second dimming delay line and a path Signal light polarization controller;

An output port of the second dimmable delay line is connected to an input port of the uplink signal light polarization controller, and an output port of the uplink signal light polarization controller is connected to an input of the third optical coupler Port

The second dimmable delay line receives the uplink signal light through an input port of the second dimmable delay line, and adjusts the uplink signal light to align the conversion signal in a time domain Idle time slot subchannel of light;

The on-channel signal light polarization controller adjusts a polarization state of the approach information light. In conjunction with the optical signal add/drop multiplexer according to the first aspect of the first aspect, in a fourth possible implementation, the converted signal light receiving module includes a converted signal light polarization controller, and the converting An input port of the signal light polarization controller is connected to the output light coupling unit, and an output port of the conversion signal light polarization controller is connected to an input port of the third coupler;

The conversion signal light polarization controller is configured to receive the converted signal light through an input port of the conversion signal light polarization controller, and adjust a polarization state of the converted signal light.

In conjunction with the optical signal add/drop multiplexer of the first aspect, in a fifth possible implementation, the second-order nonlinear optical waveguide comprises a lithium niobate optical waveguide. In conjunction with the optical signal add/drop multiplexer of the first aspect, in a sixth possible implementation, the input optical coupling unit includes an input signal light control module, and a continuous a pumping light generating module, at least one pulse pumping light generating module and a first optical coupler; the first optical coupler comprising at least three input ports and an output port, wherein the input signal light control module, continuous pumping An output port of the operation light generating module and the at least one pulse pumping light generating module are respectively connected to one input port of the first optical coupler, and an output port of the first optical coupler is connected to the second-order nonlinearity Optical waveguide

The input signal light control module is configured to receive the input signal light through an input port of the input signal light control module, and output the light to the first optical coupler after performing polarization state adjustment on the input signal light ;

The continuous pumping light generating module is configured to generate continuous pumping light, and output to the first optical coupler after adjusting the polarization state of the continuous pumping light;

The pulse pumping light generating module is configured to generate pulse pumping light, and adjust the pulse pumping light to align a time slot subchannel corresponding to the downlink signal light in the input signal light in a time domain, and Outputting to the first optical coupler after adjusting the polarization state of the pulse pumping light;

The first optical coupler receives the input signal light, the continuous pumping light, and the at least one pulse pumping light output by the input signal light control module, the continuous pump light generating module, and the pulse pumping light generating module. And coupling the input signal light, the continuous pumping light, and the at least one pulse pumping light to the second-order nonlinear optical waveguide.

In conjunction with the optical signal add/drop multiplexer of the sixth aspect of the first aspect, in the seventeenth possible implementation, the input signal light control module includes an input signal light polarization controller, An output port of the input signal light polarization controller is coupled to an input port of the first optical coupler;

The input signal light polarization controller is configured to receive the input signal light through an input port of the input signal light polarization controller to adjust a polarization state of the input light signal.

In combination with the optical signal add/drop multiplexer according to the sixth possible aspect of the first aspect, in the eighth possible implementation, the continuous pumping light generating module includes the first laser and the continuous pumping light Polarization controller

An output port of the first laser is connected to an input port of the continuous pumping light polarization controller, and an output port of the continuous pumping light polarization controller is connected to an input port of the first optocoupler 120 ; The first laser generates continuous pumping light;

The continuous pumping light polarization controller is configured to receive the continuous pumping light through an input port of the continuous pumping light polarization controller to adjust a polarization state of the continuous pumping light.

In conjunction with the optical signal add/drop multiplexer of the sixth aspect of the first aspect, in a ninth possible implementation, the pulse pumping light generating module includes a second laser, a first dimming Delay line and pulse pumping light polarization controller;

An output port of the second laser is connected to an input port of the first dimmable delay line, and an output port of the first dimmable delay line is connected to an input of the pulse pumping light polarization controller a port, an output port of the pulse pumping light polarization controller is connected to an input port of the first optical coupler;

The second laser is configured to generate pulse pumping light; the first dimmable delay line is configured to receive the pulse pumping light through an input port of the first dimmable delay line, and Adjusting the pulse pumping light to align a time slot subchannel corresponding to the downlink signal light in the input signal light in a time domain;

The pulse pumping light polarization controller is configured to receive the pulse pumping light through the pulse pumping light polarization controller input port to adjust a polarization state of the pulse pumping light.

In conjunction with the optical signal add/drop multiplexer of the first aspect, in the tenth possible implementation, the output optical coupling unit includes: a second optical coupler, at least one downlink signal tunable filter, and a conversion signal light tunable optical filter;

The second optical coupler includes an input port and at least two output ports, wherein an output port of the second optical coupler is respectively connected to an input port and a conversion signal of the at least one downlink signal tunable filter An input port of the optical tunable optical filter, wherein an input port of the second optical coupler is connected to the second-order nonlinear optical waveguide;

The second optical coupler receives the converted signal light and the at least one idle signal light through an input port of the second optical coupler, and outputs the converted signal light and the at least one idle signal light to The down signal tunable optical filter and the converted signal light tunable optical filter;

The off-channel signal tunable filter receives the converted signal light and the at least one idle signal light through an input port of the downlink signal tunable filter, and acquires the at least one idle signal light therein, The at least one idle signal light is taken as at least one way Signal light is output at an output port of the down signal light tunable optical filter;

Converting the signal light tunable optical filter, receiving the converted signal light and the at least one idle signal light through an input port of the converted signal light tunable optical filter, and acquiring the converted signal light therein The converted signal light is outputted at an output port of the converted signal light tunable filter 155.

In a second aspect, an optical signal processing method is provided, including: the optical signal add/drop multiplexer receives one input signal light, and generates one continuous pumping light and at least one pulse pumping light, wherein the light corresponds to the downlink signal a time slot subchannel of light, and placing the input signal light, continuous pumping, and pulse pumping light in the same polarization state; the optical signal add/drop multiplexer aligning the pulse pumping light Information on the input signal optical time slot subchannel is transferred to the pulsed pumping light, and pulsed pumping light with information on the input signal optical time slot subchannel is adjusted by the continuous pumping light After conversion to idle signal light as the down signal light output;

165. The optical signal add/drop multiplexer consumes information on the input signal light corresponding to the pulse pumping optical slot subchannel by using the pulse pumping light, and the input signal is optically corresponding to the The input signal light after the information on the pulse pumping optical slot subchannel is consumed is output as the converted signal light.

In conjunction with the second aspect, in a first possible implementation, the optical signal processing method 170 further includes:

The optical signal add/drop multiplexer receives at least one road signal light and the converted signal light, and adjusts the at least one road signal light to align the at least one road signal light in the time domain with the converted signal light. Free time slot subchannel, and placing the converted signal light and the at least one road signal light in the same polarization state;

175. The optical signal add/drop multiplexer optically couples the at least one way signal signal to the converted signal light and outputs the output signal light. Embodiments of the present invention provide an optical signal add/drop multiplexer and an optical signal processing method, which are implemented on an optical signal add/drop multiplexer by combining a second-order nonlinear optical waveguide parameter attenuation and wavelength conversion. The all-optical time domain processes the optical signal, increasing the rate and flexibility of processing the optical signal at the network node. DRAWINGS

1 is a schematic structural diagram of an optical signal add/drop multiplexer according to an embodiment of the present invention; FIG. 2 is a schematic structural diagram of an optical signal add/drop multiplexer according to another embodiment of the present invention;

185 is a schematic diagram of device connection of an optical signal add/drop multiplexer according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of device connections of an optical signal add/drop multiplexer according to another embodiment of the present invention; FIG.

FIG. 5 is a schematic diagram of a principle of an optical signal processing method according to an embodiment of the present disclosure;

190 is another schematic diagram of an optical signal processing method according to an embodiment of the present invention;

FIG. 7 is still another schematic diagram of an optical signal add/drop multiplexer according to an embodiment of the present invention;

FIG. 8 is a schematic diagram showing another structure of an optical signal add/drop multiplexer according to another embodiment of the present invention; FIG.

FIG. 9 is a schematic diagram of still another optical signal add/drop multiplexer according to another embodiment of the present invention; FIG.

FIG. 10 is a schematic flowchart of an optical signal processing method according to an embodiment of the present invention; FIG. 1 is a schematic flowchart of an optical signal processing method according to another embodiment of the present invention;

200 map.

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention provide an optical signal add/drop multiplexer and an optical signal processing method, which are applied to optical signal processing at a network node, where the optical signal add/drop multiplexer includes an input port and an output port. At least one drop port and at least one land port. Optical Network

In 205, an optical signal add/drop multiplexer can be applied to the node that needs local reception to input input signal light including n time slot subchannels from the input port, and selectively output from the downlink port containing the required The downlink signal light of the time slot subchannel; the plurality of uplink signals may be optically multiplexed to the input signal light through the optical signal add/drop multiplexer at the node that needs to perform local data output, specifically, the input from the uplink port needs to be transmitted. Local road signal light, will input letter The other local-independent time slot subchannels and the uplink signal optical time slot subchannels are multiplexed together and output as output signal light from the output port of the optical signal add/drop multiplexer to implement add/drop multiplexing of optical signals. .

Specifically, an embodiment of the present invention provides an optical signal add/drop multiplexer. Referring to FIG. 1, the optical signal add/drop multiplexer 1 includes an input optical coupling unit 1 1 , a second-order nonlinear optical waveguide 12 , and an output. Light coupling unit 13. The input optical coupling unit 1 1 is connected to the second-order nonlinear optical waveguide 1 2 , and the second-order nonlinear optical waveguide 1 2 is connected to the output optical coupling unit 1 3 . The input optical coupling unit 1 1 is configured to receive one input signal light, generate one continuous pumping light and at least one pulse pumping light, and combine the input signal light, the continuous pumping light and the at least one pulse pumping light together. Coupling input second-order nonlinear optical waveguide 12 .

The second-order nonlinear optical waveguide 12 receives the input signal light, the continuous pumping light, and the at least one pulse pumping light, and converts the input signal light and the at least pulse pumping light into the converted signal light, and continuously pumps the light and inputs The signal light and the at least one pulse pumping light are converted into at least one idle signal light, and the converted signal light and the at least one idle signal light are output to the output light coupling unit

1 3.

The output optical coupling unit 13 receives the converted signal light and the at least one idle signal light, and outputs the at least one idle signal light as at least one off-channel signal light, and outputs the converted signal light.

The second-order nonlinear optical waveguide 12 may be a lithium niobate optical waveguide and other optical waveguides having second-order nonlinear effects. The optical signal add/drop multiplexer provided by the embodiment of the present invention realizes the light in the all-optical time domain on the optical signal add/drop multiplexer through the combination of the second-order nonlinear optical waveguide parameter attenuation and the wavelength conversion The signal is processed to increase the rate and flexibility of processing the optical signal at the network node.

Further, corresponding to the local data output, the optical signal add/drop multiplexer 1 further multiplexes the plurality of uplink signals to the input signal light. Referring to FIG. 2, the optical signal add/drop multiplexer 1 provided by the embodiment of the present invention further The method includes: an output signal optical multiplexing unit 14 connected to the output optical coupling unit 13 for receiving at least one road signal light and the converted signal light output by the output light coupling unit 13 to couple the at least one road signal light to the converted signal light As the output signal light output. In this way, the optical network add/drop multiplexer provided by the optical network node can not only acquire the downlink signal light but also multiplex the uplink signal light to the input signal light, thereby implementing the add/drop multiplexing of the optical network.

Specifically, the optical signal add/drop multiplexer provided by the embodiment of the present invention, as shown in FIG. 3, the optical signal add/drop multiplexer 1 includes an input optical coupling unit 11, a second-order nonlinear optical waveguide 12, and an output optical coupling unit. 13. The input optical coupling unit 11 is connected to the second-order nonlinear optical waveguide 12, and the second-order nonlinear optical waveguide 12 is connected to the output optical coupling unit 13. The input optical coupling unit 11 includes:

An input signal light control module 112, a continuous pump light generating module 114, at least one pulse pumping light generating module (herein the pulse pumping light generating module 113 is taken as an example) and a first optical coupler 111, first The optical coupler 111 includes at least three input ports and one output port, wherein the output ports of the input signal light control module 112, the continuous pump light generating module 114, and the pulse pumping light generating module 113 are respectively connected to the first optical coupler 111. An input port of the first photocoupler 111 is connected to the second-order nonlinear optical waveguide 12.

The input signal light control module 112 is configured to receive an input optical signal through an input port of the input signal light control module 112, and output the polarization state of the input optical signal to the first optical coupler 111;

Specifically, the input signal light control module 112 includes an input signal light polarization controller 1121, and an output port of the input signal light polarization controller 1121 is connected to an input port of the first optical coupler 111;

The input signal light polarization controller 1121 receives the input signal light through the input port of the input signal light polarization controller 1121 to adjust the polarization state of the input light signal.

The continuous pumping light generating module 114 is configured to generate continuous pumping light, and after adjusting the polarization state of the continuous pumping light, output to the first optical coupler 111;

Specifically, the continuous pumping light generating module 114 includes a first laser 1142 and a continuous pumping light polarization controller 1141;

An output port of the first laser 1142 is connected to an input port of the continuous pumping light polarization controller 1141, and an output port of the continuous pumping light polarization controller 1141 is connected to an input port of the first optical coupler 111; The first laser 1142 produces continuous pumping light.

The continuous pumping light polarization controller 1141 is configured to receive continuous pumping light through the input port of the continuous pumping light polarization controller 1141 to adjust the polarization state of the continuous pumping light.

The pulse pumping light generating module 113 is configured to generate pulse pumping light, adjust the pulse pumping light to align the time slot subchannel of the corresponding downlink signal light in the input signal light in the time domain, and pump the light in the pulse The polarization state is adjusted and output to the first photocoupler 111;

Specifically, the pulse pumping light generating module 113 includes a second laser 1133, a first dimming delay line 1132, and a pulse pumping light polarization controller 1131;

The second laser 1133 is connected to the input port of the first dimmable delay line 1132, and the output port of the first dimmable delay line 1132 is connected to the input port of the pulse pumping light polarization controller 1131, pulse pumping An output port of the light polarization controller 1131 is connected to one input port of the first optical coupler 111;

a second laser 1133, generating pulse pumping light;

The first dimmable delay line 1132 receives the pulse pumping light through the input port of the first dimmable delay line 1132, and adjusts the pulse pumping light to align the corresponding down path in the input signal light in the time domain. a slot subchannel of the signal;

The pulse pumping light polarization controller 1131 receives the pulse pumping light through the input port of the pulse pumping light polarization controller 1131 to adjust the polarization state of the pulse pumping light.

The first optical coupler 111 receives the input signal light, the continuous pumping light, and the pulse pumping light output by the input signal light control module 112, the continuous pumping light generating module 114, and the pulse pumping light generating module 113, and inputs the input signal. The signal light, the continuous pump light, and the pulse pump light are coupled out to the second-order nonlinear optical waveguide 12.

The second-order nonlinear optical waveguide 12 receives the input signal light, the continuous pumping light, and the pulse pumping light, and converts the input signal light and the pulse pumping light into converted signal light, and continuously pumps light, input signal light, and pulse. Pumping light is converted into idle signal light, and the converted signal light and idle signal light are output to the output light coupling unit 13;

Referring to FIG. 5 and FIG. 6, specifically, in the second-order nonlinear optical waveguide 12, the input signal light wavelength and the pulse pumping light wavelength are approximately QPM (quasi phase matching) of the second-order nonlinear optical waveguide. Wavelength symmetry, cascaded second-order nonlinear effects occur, input signal light 1 photon and pulse pumping light l _pl photons are quenched in the sum frequency process to generate sum frequency Photon, continuous pumping photon adjustment and frequency photons generate idle signal photons through the difference frequency process. In this process, the wavelength conversion effect transfers the information on the input signal optical slot subchannels i, j and k to The idle pump light output, the information on the input signal light corresponding to the pulse pumping light ^slot subchannels i, j and k is consumed as a converted signal light output. The output light coupling unit 13 receives the converted signal light and the idle signal light. Specifically, the output light coupling unit 13 includes a second optical coupler 131 and at least one downlink signal light tunable filter (here, the following signal light) The tunable optical filter 1301 is explained as an example) and a converted signal light tunable optical filter 1302. The second optical coupler 131 includes an input port and at least two output ports, wherein the output ports of the second optical coupler 131 are respectively connected to the input port of the down signal tunable filter 1301 and the tunable optical filter of the converted signal light The input port of the device 1302, the input port of the second photocoupler 131 is connected to the second-order nonlinear optical waveguide 12.

The second optical coupler 131 receives the converted signal light and the idle signal light through the input port of the second optical coupler 131, and outputs the converted signal light and the idle signal light to the downlink signal tunable optical filter 1301 and the converted signal. Optical tunable optical filter 1302.

The downlink signal light tunable filter 1301 receives the converted signal light and the idle signal light through the input port of the down signal light tunable optical filter 1301, and acquires the idle signal light therein, and uses the idle signal light as a downlink The signal light is output at an output port of the down signal light tunable filter 1301;

The converted signal light tunable optical filter 1302 receives the converted signal light and the idle signal light through the input port of the converted signal light tunable optical filter 1302 and obtains the converted signal light therein, and the converted signal light is adjustable in the converted signal light The output port of the optical filter 1302 is output.

The input of the optical coupling unit 11, the second-order nonlinear optical waveguide 12, and the output optical coupling unit 13 enables the user equipment to locally receive from the optical network through the network node. Optionally, when the local data output is required, the optical signal add/drop multiplexer multiplexes the plurality of uplink signals into the input signal light, and the optical signal add/drop multiplexer provided by the embodiment of the present invention is referred to FIG. 4 Also shown is an output signal optical multiplexing unit 14. The output signal optical multiplexing unit 14 includes at least one uplink signal light receiving module (here, the above-described signal light receiving module 142 is taken as an example), a converted signal light receiving module 143 and a third optical coupler 141, and a third optical coupler 141. Includes at least two input ports and one output port.

The uplink signal light receiving module 142 is connected to an input port of the third optical coupler 141 for receiving the uplink signal light through the input port of the uplink signal light receiving module 142; Specifically, the uplink signal light receiving module 142 includes a second dimming delay line 1421 and an uplink signal light polarization controller 1422, and an output port of the second dimming delay line 1421 is connected to the uplink signal light polarization controller 1422. An input port, an output port of the uplink signal light polarization controller 1422 is connected to an input port of the third optical coupler 141;

335. The second dimmable delay line 1421 is configured to receive the uplink signal light through the input port of the second dimmable delay line 1421, and adjust the uplink signal light to align the idle time slot of the converted signal light in the time domain. channel;

The on-channel signal light polarization controller 1422 is configured to adjust the polarization state of the on-road information light. The converted signal light receiving module 143 is connected to one input port of the third coupler 141, and 340 is for receiving the output signal optical multiplexing unit through the input port of the converted signal light receiving module 143.

Specifically, the converted signal light receiving module 143 includes a converted signal light polarization controller 1431, and the input port of the converted signal light polarization controller 1431 is connected to the output light coupling unit 13, and the converted signal light polarization controller 1431 is The output port is connected to a 345 input port of the third coupler 141;

The converted signal light polarization controller 1431 receives the converted signal light by the input port of the converted signal light polarization controller 1431 to adjust the polarization state of the converted signal light.

The third optical coupler 141 is configured to couple the uplink optical signal received by the uplink signal light receiving module 142 to the converted signal light received by the converted signal light receiving module 143 as an output signal 350 light output.

The function of the user equipment to output data to the optical network through the network node can be realized by the output signal optical multiplexing unit 14. The optical signal add/drop multiplexer provided by the embodiment of the present invention realizes the 355 all-optical time domain pair on the optical signal add/drop multiplexer through the combination of the second-order nonlinear optical waveguide parametric attenuation and the wavelength conversion. The optical signal is processed to increase the rate and flexibility of processing the optical signal at the network node. The optical signal add/drop multiplexer provided by the embodiment of the present invention implements processing of the optical signal in the all-optical time domain. Specifically, referring to the optical signal add/drop multiplexer shown in FIG. 4, the specific signal processing diagram is shown. As shown in Figure 7:

360 wherein the time slot subchannels i, j and k in the input signal light are corresponding to the downlink signal light The time slot subchannel, the uplink signal light and the downlink signal light may be one way or multiple paths, where an on-road signal light and a downlink signal light are taken as an example for description; the input optical coupling unit 11 receives the input signal light. Producing continuous pumping light and pulse pumping light, wherein the pulse pumping light aligns the time slot sub-channels i, j and k in the input signal light in the time domain, and inputs the input signal light and the continuous pumping light and After the pulsed pumping light is placed in the same polarization state, it is coupled together to input the second-order nonlinear optical waveguide 12.

The second-order nonlinear optical waveguide 12 receives the input signal light, the continuous pumping light, and the pulse pumping light, and transfers information on the input signal optical sub-channels i, j, and k to the pulse pumping light, and The pulse pumping light of the information on the input signal optical time slot sub-channels i, j and k is converted by the continuous pumping light to be output as the idle signal light to the output optical coupling unit 13; The input signal light of the information is output as the converted signal light to the output light coupling unit 13 at which time there is no information on the converted signal optical time slot subchannels i, j and k.

For the working principle of the second-order nonlinear optical waveguide 12, refer to the corresponding embodiments of FIG. 5 and FIG. 6 above, and details are not described herein again.

The output optical coupling unit 13 receives the converted signal light and the idle signal light, and outputs the idle signal light as a downlink signal light, and outputs the converted signal light, wherein the downlink signal optical slot subchannels i, j, and k The information on the information is locally received by the optical signal add/drop multiplexer. Optionally, the signal optical multiplexing unit 14 receives the converted signal light output by the uplink signal light and the output optical coupling unit 13. The uplink signal optical slot subchannels i, j, and k include an optical signal add/drop multiplexer for local Data output information; The signal optical multiplexing unit 14 couples the information on the uplink signal optical time slot sub-channels i, j, and k to the converted signal optical time slot sub-channels i, j, and k as output signal light output. Optionally, referring to FIG. 8 and FIG. 9, the pulse pumping light generating module (11 3, 115) of the input light coupling unit 11 may be one or more, and each pulse pumping light generating module ( 11 3, 115) generating one pulse pumping light; the output light coupling unit 1 3 of the lower signal light tunable filter (1 301, 1 303) may be one or more, each of the down signals The optical tunable optical filter (1 301, 1 303) filters out one downlink signal light, wherein the information on each downlink signal light may be information on different time slot subchannels, or may be the same time slot. The information on the channel; the uplink signal light receiving module (142, 144) of the output signal optical multiplexing unit 14 may be one or more, and each of the uplink signal light receiving modules receives an on-road signal light, and each road signal light The slot subchannels cannot be the same; In the embodiment of the present invention, by inputting the optical coupling unit 1 1 , the second-order nonlinear optical waveguide 12 , the output optical coupling unit 13 , and the output signal optical multiplexing unit 14 , the multi-user device can locally receive through the network node, and obtain the downlink. The function of the signal light and the local data output, the function of outputting the signal light on the road, and the add-drop multiplexing of the optical network.

The embodiment of the present invention further provides an optical signal processing method, which is applied to the optical signal add/drop multiplexer provided by the foregoing apparatus embodiment. Referring to FIG. 10, the method specifically includes:

1 1 01, the optical signal add/drop multiplexer receives one input signal light, and generates one continuous pumping light and at least one pulse pumping light;

1 1 02, the optical signal add/drop multiplexer adjusts the pulse pumping light such that the pulse pumping light is aligned in the time domain with the time slot subchannel corresponding to the downlink signal light in the input signal light;

1 1 03, the optical signal add/drop multiplexer places the input signal light, the continuous pumping light and the pulse pumping light in the same polarization state;

1 1 04a, the optical signal add/drop multiplexer transfers the information on the optical sub-channel of the input signal of the pulse pumping light to the pulse pumping light, and the information on the sub-channel with the input signal optical time slot The pulse pumping light is converted into idle signal light by the continuous pumping light as the down signal light output;

1 1 04b , the optical signal add/drop multiplexer consumes the information on the input signal light on the corresponding pulse pumping optical time slot subchannel by the pulse pumping light, and the corresponding signal light is pumped to the optical time slot subchannel. The input signal light after the information consumption is output as the converted signal light.

With the optical signal processing method provided by the embodiment of the present invention, the network node can implement the function of the multi-user equipment locally receiving from the optical network through the network node by using the optical signal add/drop multiplexer provided by the foregoing apparatus embodiment, and acquiring the function of the downlink signal light. . The optical signal processing method and the optical signal add/drop multiplexer provided by the embodiments of the present invention implement the optical network division on the optical signal add/drop multiplexer through the combination of the second-order nonlinear optical waveguide parameter attenuation and the wavelength conversion. The all-optical time domain processing of the interpolated multiplexed signal improves the rate and flexibility of optical signal processing at the network node. The embodiment of the present invention further provides an optical signal processing method, which is applied to the optical signal add/drop multiplexer provided by the other device embodiment.

1 201. The optical signal add/drop multiplexer receives one input signal light, and generates one continuous pumping light and at least one pulse pumping light;

1 202. The optical signal add/drop multiplexer adjusts the pulse pumping light such that the pulse pumping light aligns the time slot subchannel of the input signal light corresponding to the downlink signal light in the time domain; 1203. The optical signal add/drop multiplexer places the input signal light, the continuous pumping light, and the pulse pumping light 425 in the same polarization state;

1204a, the optical signal add/drop multiplexer transfers the information on the optical signal sub-channel of the input signal of the pulse pumping light to the pulse pumping light, and the pulse with the information on the sub-channel of the optical channel of the input signal The pumping light is converted into idle signal light by the continuous pumping light as the down signal light output;

430 1204b, the optical signal add/drop multiplexer consumes the information on the input signal light corresponding to the pulsed optical time slot subchannel by the pulse pumping light, and the input signal light is correspondingly pulsed on the optical time slot subchannel The input signal light after the information consumption is output as the converted signal light;

1204c, the optical signal add/drop multiplexer receives at least one road signal light;

1205. The optical signal add/drop multiplexer adjusts the uplink signal light such that the uplink signal light is aligned in the time domain 435 with the idle time slot subchannel of the converted signal light;

1206. The optical signal add/drop multiplexer places the converted signal light and the uplink signal light in the same polarization state;

1207. The optical signal add/drop multiplexer couples the uplink signal light to the converted signal light and outputs it as the output signal light.

440. According to the optical signal processing method provided by the embodiment of the present invention, the network node may implement, by using the optical signal add/drop multiplexer provided by the foregoing apparatus embodiment, the multi-user equipment to locally receive from the optical network through the network node, and obtain the downlink signal light. Function and local data output, output the function of the on-going signal light, realize the add-drop multiplexing of the optical network. The optical signal add/drop multiplexer and the optical signal processing method provided by the embodiments of the present invention implement the optical network on the optical signal add/drop multiplexer through the combination of the second 445th order nonlinear optical waveguide parameter attenuation and the wavelength conversion. The all-optical time domain processing of the add/drop multiplexed signal improves the rate and flexibility of optical signal processing at the network node.

Claims

Claim

An optical signal add/drop multiplexer, comprising: an input optical coupling unit, a 450 second-order nonlinear optical waveguide, and an output optical coupling unit;

The input optical coupling unit is connected to the second-order nonlinear optical waveguide, and the second-order nonlinear optical waveguide is connected to the output optical coupling unit;

The input optical coupling unit receives one input signal light, generates one continuous pumping light and at least one pulse pumping light, and continuously pumps the input signal light with one way of 455 light and at least one pulse pumping light. Coupling and inputting the second-order nonlinear optical waveguide;

The second-order nonlinear optical waveguide receives the input signal light, the continuous pumping light, and the at least one pulse pumping light, and converts the input signal light and the at least one pulse pumping light into a converted signal light. Converting the input signal light, the at least one pulse pumping light, and the continuous pumping light into at least one idle signal light, and outputting the converted signal light and the 460 less idle signal light to the An output optical coupling unit;

The output optical coupling unit receives the at least one idle signal light and the converted signal light, and outputs the at least one idle signal light as at least one downlink signal light, and outputs the converted signal light.

2. The optical signal add/drop multiplexer according to claim 1, further comprising: an output signal optical multiplexing unit connected to said output optical coupling unit, receiving at least one way signal light and said output The converted signal light output by the optical coupling unit optically couples the at least one way signal to the converted signal light and outputs it as an output signal light.

The optical signal add/drop multiplexer according to claim 2, wherein the output signal optical multiplexing unit comprises:

470: at least one uplink signal light receiving module, a switching signal light receiving module, and a third optical coupler, wherein the third optical coupler includes at least two input ports and an output port; and the uplink signal light receiving module is connected to the An input port of the third optical coupler receives an uplink signal light through an input port of the uplink signal light receiving module; the conversion signal light receiving module is connected to an input terminal 475 of the third coupler, The input port of the conversion signal light receiving module receives the converted signal light output by the output signal optical multiplexing unit;

The third optical coupler couples the uplink optical signal received by the at least one uplink signal light receiving module to the converted signal light received by the converted signal light receiving module as an output signal No. Light output.

The optical signal add/drop multiplexer according to claim 3, wherein the uplink signal light receiving module comprises a second dimming delay line and an on-path signal light polarization controller;

An output port of the second dimmable delay line is connected to an input port of the uplink signal light polarization controller, and an output port of the uplink signal light polarization controller is connected to an input of the 85th optical coupler Port

The on-channel signal light polarization controller adjusts a polarization state of the approach information light.

The optical signal add/drop multiplexer according to claim 3, wherein the converted signal light receiving module comprises a converted signal light polarization controller,

An input port of the conversion signal light polarization controller is connected to the output optical coupling unit, and an output port of the conversion signal light polarization controller is connected to an input port of the third coupler;

95. The converted signal light polarization controller, configured to receive the converted signal light through an input port of the converted signal light polarization controller, and adjust a polarization state of the converted signal light.

6. The optical signal add/drop multiplexer according to claim 1, wherein: said second-order nonlinear optical waveguide comprises a lithium niobate optical waveguide.

7. The optical signal add/drop multiplexer according to claim 1, wherein said input optical coupling unit comprises an input signal light control module, a continuous pump light generating module, and at least one pulse pumping a light generating module and a first optical coupler;

The first optical coupler includes at least three input ports and one output port, wherein output signals of the input signal light control module, the continuous pump light generating module, and the at least one pulse pumping light generating module are respectively connected to the An input port of the first optocoupler,

05 The output port of the first optical coupler is connected to the second-order nonlinear optical waveguide;

The input signal light control module is configured to receive the input signal light through an input port of the input signal light control module, and the input signal light is subjected to polarization state adjustment and output To the first optical coupler;

The first optical coupler receives the input signal light, the continuous pumping light, and the at least one pulse pumping light output by the input signal light control module, the continuous pump light generating module, and the pulse pumping light generating module, And inputting the input signal light, the continuous pumping light and the at least one pulse pumping light to the second-order nonlinear optical waveguide.

8. The optical signal add/drop multiplexer according to claim 7, wherein the input signal light control module comprises an input signal light polarization controller;

An output port of the input signal light polarization controller is coupled to an input port of the first optical coupler;

9. The optical signal add/drop multiplexer according to claim 7, wherein said continuous pumping light generating module comprises a first laser and a continuous pumping light polarization controller;

An output port of the first laser is connected to an input port of the continuous pumping light polarization controller, and an output port of the continuous pumping light polarization controller is connected to an input port of the first optical coupler;

The first laser generates continuous pumping light;

The optical signal add/drop multiplexer according to claim 7, wherein the pulse pumping light generating module comprises a second laser, a first dimming delay line, and a pulse pumping light polarization control. Device

An output port of the second laser is coupled to an input of the first dimmable delay line a port, an output port of the first dimmable delay line is connected to an input port of the pulse pumping light polarization controller, and an output port of the pulse pumping light polarization controller is connected to the first optical coupling An input port of the device;

The second laser is configured to generate pulse pumping light;

The first dimmable delay line is configured to receive the pulse pumping light through an input port of the first dimmable delay line, and adjust the pulse pumping light to be aligned in a time domain a slot subchannel corresponding to the downlink signal light in the input signal light;

The optical signal add/drop multiplexer according to claim 1, wherein the output optical coupling unit comprises: a second optical coupler, at least one downlink signal tunable filter, and a conversion signal Optical tunable optical filter;

The off-channel signal tunable filter receives the converted signal light and the at least one idle signal light through an input port of the downlink signal tunable filter, and acquires the at least one idle signal light therein, And outputting the at least one idle signal light as at least one downlink signal light at an output port of the downlink signal light tunable filter;

Converting the signal light tunable optical filter, receiving the converted signal light and the at least one idle signal light through an input port of the converted signal light tunable optical filter, and acquiring the converted signal light therein The converted signal light is output at an output port of the converted signal light tunable filter.

1 2, an optical signal processing method, characterized in that:

The optical signal add/drop multiplexer receives one input signal light and generates one continuous pumping light And at least one pulse pumping light, adjusting the pulse pumping light to align the at least one pulse pumping light in a time domain with a time slot subchannel corresponding to the downlink signal light in the input signal light, and The input signal light, the continuous pumping light, and the at least one pulse pumping light are placed in the same polarization state; the optical signal add/drop multiplexer aligns the input signal optical time slot with the pulse pumping light The information on the subchannel is transferred to the pulse pumping light, and the pulse pumping light with the information on the optical subchannel of the input signal is adjusted by the continuous pumping light to be converted into idle signal light. Down signal light output;

And the optical signal add/drop multiplexer consumes information on the input signal light corresponding to the pulse pumping optical slot subchannel by the pulse pumping light, and the input signal is optically corresponding to the The input signal light after the information on the pulse pumping optical slot subchannel is consumed is output as the converted signal light.

The optical signal processing method according to claim 12, wherein the method further comprises:

The optical signal add/drop multiplexer receives at least one road signal light and the converted signal light, and adjusts the at least one road signal light to align the at least one road signal light in the time domain with the converted signal light. Free time slot subchannel, and placing the converted signal light and the uplink signal light in the same polarization state;

The optical signal add/drop multiplexer optically couples the at least one way signal to the converted signal light and outputs it as an output signal light.