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Investigation on High Speed All-optical Wavelength Conversion Based on Cascading SOA and Optical Filter

Author: GongJinQian
Tutor: ZhangXinLiang
School: Huazhong University of Science and Technology
Course: Optical Engineering
Keywords: Semiconductor optical amplifier Wavelength converter Patterning effect Optical filtrer
CLC: TN929.1
Type: Master's thesis
Year: 2009
Downloads: 35
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Abstract


Semiconductor optical amplifier(SOA) has become the essential device to realize all-optical wavelength conversion(AOWC) because of its low power consumption and high nonlinear effects. However, the speed of AOWC is limited by patterning effect, while the patterning effect which caused by the slow recovery of the carrier could be removed by using cascading optical filter, and high speed AOWC have been realized by using different types of fiters. In this paper high speed AOWC based on cascading SOA and asymmetric Mach-Zehnder interferometer(AMZI), Guass filter is theoretically and experimentally studied. The main contents are listed as follows:(1)Several scheme of AOWC based on nonlinear effects of SOA are summarized and explained, and several scheme based on XPM are analyzed.(2)The pattern effect on the gain, phase and chirp of the probe light are analyzed based on ultrafast dynamic model of SOA. The scheme of linear patterning effect removed by optical filter is explained using small signal analysis, of which the nonlinear pattern effect removal technique is researched(3)Each scheme of chapter 2 is optimized, including cascading an SOA,an AMZI or a Guass filter, or both of them. The relation between the parameters of filters and the performance of the converter is researched.(4)Extinction ratio improvement AOWC based on cascading an SOA, an AMZI and a blue shift detuned Guass filter is experimentally studied, and 80Gb/s AOWC is realized.(5)Both scheme of Multi-wavelength converters(MWC) based on cascading an SOA, an AMZI ,four detuned Guass filters or an AWG is theoretically researched. The spectrum response of the AWG is researched, and different speed MWC is reviewed ,of which the spacing is 200GHz.

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