Compact In-Fiber Interferometer Formed by Long-Period Gratings in Photonic Crystal Fiber

被引：23

作者：

Ju, Jian ^{[1
]}

Jin, Wei ^{[1
]}

Ho, Hoi Lut ^{[1
]}

机构：

[1] Hong Kong Polytech Univ, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2008年 / 20卷 / 21-24期

关键词：

Long-period gratings (LPGs); optical fiber sensors; photonic crystal fibers (PCFs);

D O I：

10.1109/LPT.2008.2005207

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We reported the design and implementation of an in-fiber Mach-Zehnder interferorneter (MZI) based on a pair of long-period gratings (LPGs) written oil a photonic crystal fiber (PCF). The LPG was fabricated by using a pulsed CO2 laser to curve grooves periodically along the PCF. The MZI relies oil the interference between the fundamental core mode and a cladding mode of the PCF. The MZI was further demonstrated as a temperature sensor and a strain sensor. The temperature and strain sensitivities were measured to be 42.4 pm/degrees C . m and -2.6 pm/mu epsilon, respectively. We also fabricated an MZI on a single-mode fiber, which has a temperature sensitivity of 1215.56 pm/(degrees C . m) and a strain sensitivity of +0.445 pm/mu epsilon.

引用

页码：1899 / 1901

页数：3

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