Measurement of fibers' valid elastic-optic constant based on optical fiber Bragg grating sensor

Bao-jin Peng; Yan-biao Liao; Min Zhang; Hui Wang; Chao-fu Ying; Shu-rong Lai

doi:10.1117/12.668397

20 January 2006 Measurement of fibers' valid elastic-optic constant based on optical fiber Bragg grating sensor

Bao-jin Peng, Yan-biao Liao, Min Zhang, Hui Wang, Chao-fu Ying, Shu-rong Lai

Proceedings Volume 6027, ICO20: Optical Information Processing; 602746 (2006) https://doi.org/10.1117/12.668397
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China

Abstract

With the fast development of fiber technology, a lot of new type fibers come out one after another. As the fiber core materials of these new type fibers are not as the traditional pure quartz, if we want to find out the new characteristics of these new type fibers quantitatively, we must know its valid elastic-optic constants, so how to mearsure accurately or calculate valid elastic-optic constants of these new type fibers are the questions we are facing and we must solve them exactly. Plenty of fiber cores of the new type are adulterated, and some material characteristic parameters have no interrelated formula, so someone can only gain them by experiments. There are few literatures published about detecting valid elastic-optic constants. The common method is comparison measuring with piezoelectricity crystal, which is operated complexly and the precision is not high. So this method is not suitable to measure the thin fiber. This paper reports a new method to mearsure fibers valid elastic-optic constants using a temperature referrence FBG, a sensing FBG and a kind of material with known expansion coefficient. We also establish a experimental system, the result of experiment proves that the system can solve the existent cross sensitive problem which caused by temperature and strain effectively. Measurement error is smaller than 1.3%. In addition, this text also points out two other measurement methods in use of FBG combining fiber interferometer and general Michelson interferometer.

Citation Download Citation

Bao-jin Peng, Yan-biao Liao, Min Zhang, Hui Wang, Chao-fu Ying, and Shu-rong Lai "Measurement of fibers' valid elastic-optic constant based on optical fiber Bragg grating sensor", Proc. SPIE 6027, ICO20: Optical Information Processing, 602746 (20 January 2006); https://doi.org/10.1117/12.668397

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KEYWORDS

Optical fibers

Fiber Bragg gratings

Temperature metrology

Sensors

Signal detection

Aluminum

Crystals

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