Novel fiber-optic temperature sensor based on hollow optical fiber

被引：4

作者：

Choi, SS ^{[1
]}

Jung, YM ^{[1
]}

Eom, TJ ^{[1
]}

Lee, BH ^{[1
]}

Oh, KW ^{[1
]}

Lee, HY ^{[1
]}

Jeong, DH ^{[1
]}

机构：

[1] LG Elect PRC, Evaluat Technol Gr, Kyonggi Do 451713, South Korea

来源：

OPTOMECHATRONIC SENSORS, ACTUATORS, AND CONTROL | 2004年 / 5602卷

关键词：

all-fiber devices; temperature sensors; specialty optical fibers; fiber optic components;

D O I：

10.1117/12.571152

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Novel all-fiber optic temperature sensors based on hollow optical fibers (HOFs) are presented. The HOFs with an air hole diameter of 8mum at the center are fabricated through elaborate controls of MCVD and fiber drawing process. Two types of all-fiber temperature sensors are described. One is an all-fiber temperature sensor composed of a short HOF serially concatenated between a pair of long-period fiber gratings using a B/Ge-codoped core single mode fiber (SMF). The broadband pass-band tuning range of 84.3nm, covering both S and C band, is observed in the range from 25 to 215degreesC. Transmission peak is linearly shifted showing negative slope of -0.44nm/degreesC at 1500nm region. Its design, fabrication arts, and device integration are explained with characteristics of output filter spectrum and temperature tuning. The other is an in-line fiber etalon temperature sensor using a short HOF segment fusion-spliced between standard SMFs. This device is characterized in terms of wavelength shift according to temperature for HOFs with and without Ge-doped ring core. Temperature sensitivity of 3.38x10(-5)/degreesC and dynamic range of 20dB are observed over the range from 25 to 330degreesC at 1550nm. It is confirmed that the experimental results for both fiber optical sensors show a,Good agreement with theoretical analysis.

引用

页码：234 / 241

页数：8

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