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All-optical Wavelength Converter Based on FWM in Semi-conductor Optical Amplifier with Dual-pump for PolSK Format

Author: ZouZhiQiang
Tutor: LiPeiLi
School: Nanjing University of Posts and Telecommunications
Course: Optical Engineering
Keywords: All-optical wavelength converter A semiconductor optical amplifier Four-wave mixing Polarization shift keying Double - pumped
CLC: TN929.1
Type: Master's thesis
Year: 2011
Downloads: 35
Quote: 0
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Abstract


All-optical wavelength converter can eliminate competition in the wavelength of the wavelength division multiplexing (WDM) systems, flexible and reliable networking is important optoelectronic devices automatically switched optical network (ASON), plays a key role in the development of all-optical network in the future. The implementation of all-optical wavelength converter, semiconductor optical amplifier (SOA)-based four-wave mixing (FWM) based wavelength converter due to the strict and transparent modulation format, modulation rate, has been widespread concern. At present, all-optical wavelength converter based mainly binary amplitude shift keying (OOK) and differential phase shift keying (DPSK) signal modulation formats, all-optical wavelength conversion for polarization shift keying the (PolSK) signal modulation format Very little. This article is based on a dual pump FWM effect of SOA, the PolSK modulation format proposed for all-optical wavelength conversion scheme. Wavelength conversion scheme has the advantages of high conversion efficiency, high extinction ratio and wavelength conversion range. Depth theoretical study on the the modulation format PolSK dual-pump FWM-based all-optical wavelength converter, as follows: 1) The study of all-optical wavelength converter, outlines the types of wavelength converter and development. 2) analysis of a variety of non-linear effects in the SOA, especially in the third-order nonlinear effects, SOA the most basic of the light field transfer equation and the carrier rate equation is derived. 3) the use of dual-pump FWM in SOA is proposed for all-optical wavelength converter program in PolSK modulation format, the program can improve the efficiency of wavelength conversion, to improve the extinction ratio, increasing the range of wavelength conversion. 4) to establish a theoretical model based on dual-pump FWM in SOA-based all-optical wavelength converter complete broadband. In broadband theoretical model, taking into account the SOA material gain spectrum, longitudinal spatial distribution of the light field, the carrier spatial distribution and broadband ASE spectrum. The dual pump FWM wavelength converter performance, broadband theoretical model provides a theoretical basis. 5) Using the established theoretical model based on dual-pump FWM in SOA-based all-optical wavelength converter broadband, through MATLAB software numerical simulation conducted in-depth study of this wavelength converter conversion efficiency and extinction ratio characteristics, Analysis of the relationship between conversion efficiency and output extinction ratio characteristics and the input power of pump light, signal light power input of the pump light wavelength, the signal light wavelength.

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