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An all-optical wavelength converter for dpsk signals

A wavelength converter and optical filter technology, applied in the field of optical fiber communication and optical fiber sensing, to achieve the effect of easy implementation, light weight and simple structure

Active Publication Date: 2019-05-03
NANJING HENGGAO OPTO ELECTRONICS RES INST CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] In order to solve the technical problems raised by the above-mentioned background technology, the present invention aims to provide an all-optical wavelength converter for DPSK signals, which overcomes the defects of existing all-optical wavelength conversion technology, eliminates the interference of cross-gain modulation on cross-phase modulation, and realizes All-optical wavelength conversion based on cross-phase modulation

Method used

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  • An all-optical wavelength converter for dpsk signals
  • An all-optical wavelength converter for dpsk signals
  • An all-optical wavelength converter for dpsk signals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] exist image 3 On the basis of , the first optical combiner 5 and the second optical combiner 7 are added, and the first optical combiner 5 and the second optical combiner 7 are common optical fiber couplers. The first input end 51 of the first optical combiner 5 is connected to the output end of the second semiconductor laser 4, the second input end 52 of the first optical combiner 5 is connected to the first output end 13 of the optical coupler 1, and the first optical combiner The output terminal 53 of the device 5 is connected to the same direction input terminal 61 of the semiconductor optical amplifier 6, the input terminal 72 of the second optical combiner 7 is connected to the second output terminal 14 of the optical coupler 1, and the first output of the second optical combiner 7 End 73 is connected to the inverting input end 62 of semiconductor optical amplifier 6, and the second output end 71 of the second optical combiner 7 outputs the optical signal P of th...

Embodiment 2

[0053] On the basis of Embodiment 1, both the first optical combiner 5 and the second optical combiner 7 are wavelength division multiplexing couplers, and the optical filter 8 is omitted at this time, because the filtering of the second wavelength division multiplexing coupler 7 function, so that the optical signal output from the reverse input end 62 of the semiconductor optical amplifier 6, only the light of the target wavelength is output from its port 71, thereby completing the conversion from the input wavelength signal P in (λ 1 ) to the target wavelength signal P out (λ 2 ) wavelength conversion. Such as Figure 5 shown.

Embodiment 3

[0055] On the basis of Embodiment 1, an optical circulator 9 is used to replace the second optical combiner 7 in Embodiment 1. This optical circulator 9 includes three ports 91, 92, 93, and its optical path is 91 → 92 → 93 , its port 92 is connected with the output terminal 14 of the optical coupler 1, and after the optical signal enters the optical circulator 9 from the port 92, it is reversely injected into the port 62 of the semiconductor optical amplifier 6 from the port 93; The optical signal output from port 62 is returned to port 93 of optical circulator 9, and then output from port 91. The output optical signal passes through filter 8 to select the wavelength to be converted, and filter out other useless light. Such as Image 6 shown.

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Abstract

The invention discloses an all-optical wavelength converter oriented to DPSK signals. The all-optical wavelength converter oriented to the DPSK signals is characterized in that an output end of a first semiconductor laser is connected with a first input end of an optical coupler via a tunable phase shifter, a second input end of the optical coupler is connected with external input light, the first output end of the optical coupler is connected with a non-inverting input end of an SOA (semiconductor optical amplifier), the second output end of the optical coupler is connected with an inverting input end of the SOA, and an output end of a second semiconductor laser is connected with the non-inverting input end of the SOA. The first semiconductor laser generates local input light as same as external input light in wavelength, the local input light is inputted into the optical coupler via the phase shifter, and the two channels of light interfere with each other in the optical coupler to generate a pair of differential balance optical signals. The second semiconductor laser inputs target wavelength light into the non-inverting input end of the SOA, and the target wavelength light and the pair of optical signals outputted by the optical couplers act in the SOA, so that phase modulation signals with the target wavelength are generated. The all-optical wavelength converter oriented to the DPSK signals eliminates interference of cross-gain modulation on cross-phase modulation, so that efficient all-optical wavelength conversion is achieved.

Description

technical field [0001] The invention belongs to the technical fields of optical fiber communication and optical fiber sensing, and in particular relates to an all-optical wavelength converter. Background technique [0002] Phase-shift keying signal is a modulation format widely used in high-speed optical communication systems, among which differential phase-shift keying signal (DPSK signal) is the basic phase-shift keying signal and the basis of high-order coding format. With the continuous improvement of communication transmission rate, phase shift keying (PSK) signal has become the mainstream technology of high-speed optical communication above 40Gb / s and 100Gb / s. However, compared with the high-speed transmission technology, the optical network technology is extremely backward, especially in terms of network flexibility, reliability and scalability. So far, the all-optical network technology has not gained a lot of commercial application. [0003] All-optical wavelength...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F2/00
CPCG02F2/004G02F2/006
Inventor 吴重庆
Owner NANJING HENGGAO OPTO ELECTRONICS RES INST CORP