Experimental characterization of the spectra of etched long-period grating pairs

被引：1
|
作者：
Ding, JF [1 ]
Zhang, AP [1 ]
Fu, HY [1 ]
机构：
[1] Zhejiang Univ, Dept Opt Engn, Ctr Opt & Electromagnet Res, Hangzhou 310027, Peoples R China
来源：
PASSIVE COMPONENTS AND FIBER-BASED DEVICES II, PT 1 AND 2 | 2005年 / 6019卷
关键词：
long-period grating; Mach-Zhender interferometer; optical fiber sensor; refractive-index measurement; etching process;
D O I：
10.1117/12.635985
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
After an analysis of the spectral characteristics of the long-period grating (LPG) with decreasing the fiber cladding diameter, we experimentally investigated the spectra of etched LPG pairs (LPGPs) with similar to 3 dB transmissivity (as infiber M-Z interferometers). The evolutions of the transmission spectra were characterized as the cladding diameters were decreased by HF etching process. A shift of the stop-band of LPG and interference pattern of LPGP to longer wavelength was observed with the reduction of cladding diameter, in which that of higher order cladding mode induced a larger shift. The responses of the LPGs and LPGPs with different etching, degrees to the change of the surrounding refractive-index were measured, and an increased sensitivity is observed in the experiment.
引用
收藏
页码：U861 / U869
页数：9
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