Femtosecond laser fabrication of long period fiber gratings and applications in refractive index sensing

Benye Li, Lan Jiang*, Sumei Wang, Hai Lung Tsai, Hai Xiao

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

77 引用 (Scopus)

摘要

An improved point-by-point inscription method is proposed to fabricate long period fiber gratings (LPFGs) by using a laser operating at 800 nm with 35 fs duration pulses. The sensitivity to misalignment between the core and the focus is reduced by scanning a rectangular part on the fiber. LPFGs with an attenuation depth of 20 dB are achieved within the wavelength range of 14651575 nm. Characterization of the temperature sensitivity and thermal stability of the LPFGs is presented. A 5.6 nm wavelength shift and a 1.2 dB decrease in the attenuation peak are observed following heat treatment at 600 °C for 4 h. The fabricated LPFGs are used as refractive index sensors. The effect of heat treatment on the response of the LPFGs to refractive index changes is also studied.

源语言英语
页(从-至)1420-1423
页数4
期刊Optics and Laser Technology
43
8
DOI
出版状态已出版 - 11月 2011

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