Investigation on gain characteristics in non-degenerate cascaded phase sensitive parametric amplifiers

We theoretically and experimentally show the impact of the ratio between the signal and idler generated from the PIA part on the gain characteristics in the continuous wave （CW） pump non-degenerate cascaded phase-sensitive fiber optical parametric amplifier （PS-FOPA）. The results show that the lengt...

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Bibliographic Details
Published inOptoelectronics letters Vol. 8; no. 3; pp. 172 - 175
Main Author 饶岚 余重秀 申向伟 桑新柱 苑金辉 曾小芳 忻向军
Format Journal Article
LanguageEnglish
Published Heidelberg Tianjin University of Technology 01.05.2012
Subjects
Lasers
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
PIA
光纤参量放大器
增益特性
小信号增益
相敏
级联
非退化
高非线性光纤
Power Ratio
Noise Figure
Optic Express
Gain Spectrum
Pump Power
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Summary:We theoretically and experimentally show the impact of the ratio between the signal and idler generated from the PIA part on the gain characteristics in the continuous wave （CW） pump non-degenerate cascaded phase-sensitive fiber optical parametric amplifier （PS-FOPA）. The results show that the length of highly nonlinear fiber （HNLF） used for generating the idler can cause the variation of power ratio between the idler and signal, which sign, ificantly affects the gain characteristics of the PS-FOPA under the small signal gain condition. To obtain high gain, it is better to choose long HNLF to generate idler. In our experiment, 5.5 dB gain and 18 nm bandwidth （on/off gain〉 10 dBm） in PS-FOPA can be achieved when 300 m-long HNLF instead of 200 m-long HNLF is used in PIA.
Bibliography:12-1370/TN
RAO Lan , YU Chong-xiu , SHEN Xiang-wei , SANG Xin-zhu , YUAN Jin-hui , ZENG Xiao-fang, XIN Xiang-jun （1. School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China ;2. Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China）
We theoretically and experimentally show the impact of the ratio between the signal and idler generated from the PIA part on the gain characteristics in the continuous wave （CW） pump non-degenerate cascaded phase-sensitive fiber optical parametric amplifier （PS-FOPA）. The results show that the length of highly nonlinear fiber （HNLF） used for generating the idler can cause the variation of power ratio between the idler and signal, which sign, ificantly affects the gain characteristics of the PS-FOPA under the small signal gain condition. To obtain high gain, it is better to choose long HNLF to generate idler. In our experiment, 5.5 dB gain and 18 nm bandwidth （on/off gain〉 10 dBm） in PS-FOPA can be achieved when 300 m-long HNLF instead of 200 m-long HNLF is used in PIA.
ISSN:1673-1905
1993-5013
DOI:10.1007/s11801-012-1174-4