发光学报Issue(8)：969-975,7.DOI:10.3788/fgxb20153608.0969
GaAs在光通讯波段的超快非线性光学研究
Ultrafast Optical Nonlinearities in GaAs at Telecommunication Wavelengths
摘要
Abstract
We report experimental investigations of nonlinear dynamics and optical nonlinearities of GaAs single crystal in the telecommunication windows. Femtosecond time-resolved degenerate pump-probe measurements indicate that the observed third-order nonlinear process originates from the instantaneous effect whereas the fifth-order effect arises from two-photon absorption (2PA) induced free-carrier nonlinearities. By performing the Z-scan experiments with femtosecond laser pulses at the wavelengths of 1 300 nm and 1 500 nm, we determine all nonlinear parameters of GaAs crystal, including 2PA coefficient, third-order nonlinear refraction index, 2PA-induced free-carrier absorption cross section, and 2PA-induced free-carrier refraction cross section. These results suggest that GaAs crystal is a promising candidate for applications on optical limiting and photodetector at the telecommunication wavelengths.关键词
双光子吸收/自由载流子吸收/砷化镓单晶/光通讯波长Key words
two-photon absorption/free carrier absorption/GaAs crystal/telecommunication wavelengths分类
数理科学引用本文复制引用
陈智慧,肖思,何军,顾兵..GaAs在光通讯波段的超快非线性光学研究[J].发光学报,2015,(8):969-975,7.基金项目
国家自然科学基金(61222406,11174371,11174160) （61222406,11174371,11174160）
湖南省自然科学基金(12JJ1001) （12JJ1001）
教育部博士学科点专项科研基金(20110162120072) （20110162120072）
教育部新世纪优秀人才支持计划( NCET-11-0512) （ NCET-11-0512）
中南大学研究生自主探索创新基金(2014zzts138)资助项目 （2014zzts138）
