外文题目: Photothermal effects in phase shifted FBG with varied light wavelength and intensity
作者: Ding, Meng; Chen, Dijun; Fang, Zujie; Wang, Di; Zhang, Xi; Wei, Fang; Yang, Fei; Ying, Kang; Cai, Haiwen
刊名: Opt. Express
年: 2016 卷: 24 期: 22 页： 25370--25379
英文关键词:

FIBER BRAGG GRATINGS; LASER
英文摘要:
The intensity enhancement effect of a phase-shifted fiber Bragg grating (PSFBG) is investigated theoretically and experimentally in this paper. Due to the effect, both of the FBG reflection bands and the transmission peak show red-shift with the increase of pump light wavelength from the shorter side to the longer side of the Bragg wavelength. The transmission peak shifts in pace with the pump's wavelength, which is much faster than the reflection band. The maximum shift increases with the pump power. In contrast, the red-shift is very small when the pump light deceases from the longer side of the Bragg wavelength. Such asymmetric behavior is checked dynamically by using a frequency modulated laser in a serrated wave, showing push-pull behavior. The effect of the characteristics of thermal dissipation conditions is also measured. The fiber loss coefficient of FBG being tested is estimated from the measured data to be about 0.001 mm(-1), which may be attributed to the H-2-loading and UV exposure in FBG fabrication. The observed phenomena are believed of importance in application where PSFBG is utilized as a narrow linewidth filter. (C) 2016 Optical Society of America


文献类型: 期刊论文
正文语种: English
收录类别: SCIEI
DOI: 10.1364/OE.24.025370


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