A refractometer based on a micro-slot in a fiber Bragg grating formed by chemically assisted femtosecond laser processing

Zhou, Kaiming, Lai, Yicheng, Chen, Xianfeng, Sugden, Kate, Zhang, Lin and Bennion, Ian (2007). A refractometer based on a micro-slot in a fiber Bragg grating formed by chemically assisted femtosecond laser processing. Optics express, 15 (24), pp. 15848-15853.

Abstract

A liquid core waveguide as a refractometer is proposed. Microtunnels were created in standard optical fiber using tightly focused femtoscond laser inscription and chemical etching. A 1.2(h)x125(d) x500(l) µm micro-slot engraved along a fiber Bragg grating (FBG) was used to construct liquid core waveguide by filling the slot with index matching oils. The device was used to measure refractive index and sensitivity up to 10- 6/pm was obtained.

Additional Information: © 2007 Optical Society of America. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/abstract.cfm?id=144894. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Uncontrolled Keywords: liquid core waveguide, refractometer, microtunnels, standard optical fiber, femtoscond laser inscription, chemical etching
Published Date: 2007-11
Authors: Zhou, Kaiming
Lai, Yicheng
Chen, Xianfeng
Sugden, Kate
Zhang, Lin
Bennion, Ian

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