%0 Journal Article
%T Ultra-Long Period Fiber Gratings Written by High-Frequency CO2 Laser Pulses<br>高频CO2激光脉冲写入的超长周期光纤光栅
%A Department of Optoelectronic Engineering
%A Chongqing University
%A Chongqing
%A School of Communication
%A Information Engineering
%A Electronics Science
%A Technology University
%A Chengdu
%A <br>朱涛
%A 饶云江
%A 莫秋菊
%J 光子学报
%D 2005
%I 
%X Novel ultra-long period fiber gratings (ULPFGs) with periods of up to several millimeters, which were written by the high-frequency CO_2 laser pulses,were reported.The refractive index change occured mainly within the cladding area of the fiber and had an unsymmetrical distribution on the cross-section of the ULPFG.The resonant loss peaks of the ULPFG were generated from the coupling of the forward propagating core mode to the cladding modes of fundamental and harmonic orders.Such a ULPFG can be used to measure multi-parameters simultaneously as these resonant loss peaks have different sensitivities to temperature,strain,bending and torsion,et al.The temperature and strain characteristics of the ULPFGs with 3 mm period were investigated by experiment.Meanwhile,several new approaches of the potential applications of the ULPFG were proposed.
%K Waveguide optics
%K Optical fiber sensors
%K CO2 lasers pulses
%K ULPFG
%K Multi-parameter<br>导波光学
%K 光纤传感器
%K CO2激光脉冲
%K ULPFG
%K 多参数
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=9F6139E34DAA109F9C104697BF49FC39&aid=11DE908081165136&yid=2DD7160C83D0ACED&vid=339D79302DF62549&iid=708DD6B15D2464E8&sid=A87AC493625B15AF&eid=19519743553AEE80&journal_id=1004-4213&journal_name=光子学报&referenced_num=0&reference_num=11