All-optical wavelength/code conversion device

Abstract

The invention discloses an all-optical wavelength / code type conversion device, relates to the field of optical network communication, and realizes all-optical wavelength / code type conversion of various code type signals of polarization division multiplexing (PDM), orthogonal polarization and frequency division multiplexing (OPFDM), single polarization signals and the like. The device comprises a first pump light transmitting device, a second pump light transmitting device, a pump light controller and a polarization maintaining coupler, wherein the first pump light transmitting device transmits first pump light in an x polarization state; the second pump light transmitting device transmits second pump light in a y polarization state; the pump light controller adjusts the first pump light transmitting device and the second pump light transmitting device, so that the frequencies of the first and second pump light, the frequency of signal light to be converted and the frequency of conversion signal light of a target wavelength / code type meet a preset relationship; the first and second pump light are coupled by the polarization maintaining coupler and input into a nonlinear optical waveguide; and in the nonlinear optical waveguide, the signal light to be converted and dual pump light input by the polarization maintaining coupler are subjected to a four-wave mixing effect, and signal light with the target wavelength is generated. The device is mainly applied to an optical network.

Description

technical field [0001] The invention relates to the technical field of optical network communication, in particular to an all-optical wavelength / code conversion device. Background technique [0002] In the field of optical fiber communication, DWDM (Dense Wavelength Division Multiplexing, Dense Wavelength Division Multiplexing) network can provide large-capacity and diversified broadband services. It has also gradually become the trend that dominates the backbone network architecture. The all-optical wavelength converter is one of the key devices to realize optical communication in DWDM network. It can realize the duplication of information from one wavelength optical carrier to another wavelength optical carrier, which can effectively reduce the network blocking rate and improve the efficiency of the optical network. Flexibility and scalability to realize the forwarding of optical signals in an open DWDM system. [0003] A 320 Gbit / s D(Q)PSK all-optical wavelength convert...

AI Technical Summary

Problems solved by technology

The wavelength converter utilizes the second-order nonlinear effect of the cascaded frequency doubling and difference frequency in the Ti:PPLN optical waveguide to realize the wavelength conversion of D(Q)PSK signals. However, the Ti:PPLN optical waveguide only supports the single polarization state TM mode Signals that meet the quasi-phase matching conditions realize wavelength conversion. Therefore, it is difficult to realize advanced modulation formats PDM-DQPSK (Polarization Division Multiplexing-Differential Quadrature Phase Shift Keying, polarization multiplexing-optical differential quadrature phase shift keying) and OPFDM at high rates. -Wavelength conversion of DQPSK signal (Orthogonal Polarization and Frequency Division Multiplexing-Differential Quadrature Phase ShiftKeying, Orthogonal Polarization Frequency Division Multiplexing-Optical Differential Quadrature Phase Shift Keying) etc.

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