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PPLN waveguide all-optical demultiplexing scheme optimization design

Author: ShenJing
Tutor: GuZuoYi
School: Beijing University of Posts and Telecommunications
Course: Electromagnetic Field and Microwave Technology
Keywords: All-optical demultiplexing PPLN waveguide QPM Cascaded second-order nonlinear Conversion efficiency Crosstalk
CLC: TN252
Type: Master's thesis
Year: 2009
Downloads: 35
Quote: 0
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Abstract


This article describes the periodically poled lithium niobate (PPLN) waveguide in the optical communication system applications, and discusses the PPLN waveguide cascaded second-order nonlinear all-optical time domain demultiplexing scheme . Comprehensive study of the length of the waveguide , the pump light and the pump light pulse pulse width offset these three important parameters to obtain the maximum conversion efficiency and the crosstalk while controlling a given threshold. The pump light pulse shift amount control can be controlled within a certain range crosstalk , in this range, an optimum value can be taken to improve the conversion efficiency , and as between the frequency and the signal light group velocity mismatch , this optimum value is generally negative ; the crosstalk control case below the threshold , the pump light pulse width should be the maximum value possible , to obtain maximum efficiency ; the crosstalk control case below the threshold , waveguide length also have to take the maximum extent possible , to ensure that the walk-off effect to get some control . This defines the maximum length of the waveguide , the pump light pulse width and the maximum optimal pumping light pulse offset concept. Analyzed using numerical methods waveguide length , pump light pulse width and pulse pumping light offset between these three important parameters relationship and against from 160Gb / s to 10Gb / s signal rate derived analytically this three parameter optimization relationship between values ??. Numerical simulation results obtained with the theoretical analysis results are in good agreement . Based on these analyzes , for a given waveguide length and pump light pulse width given two different scenarios , this paper presents an optimization program to determine how to take given the other two parameters for the best. Using this scheme can obtain maximum conversion efficiency and the quality of converted light pulse meet the actual needs.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Photonics technology,laser technology > Optical waveguide and integrated optics > Waveguide
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