Joining techniques for small-diameter optical fiber used in embedded sensor

Seiji Kojima; Sinji Komatsuzaki; Akihito Hongo; Nobuo Takeda; Tateo Sakurai

doi:10.1117/12.623628

23 May 2005 Joining techniques for small-diameter optical fiber used in embedded sensor

Seiji Kojima, Sinji Komatsuzaki, Akihito Hongo, Nobuo Takeda, Tateo Sakurai

Proceedings Volume 5855, 17th International Conference on Optical Fibre Sensors; (2005) https://doi.org/10.1117/12.623628
Event: 17th International Conference on Optical Fibre Sensors, 2005, Bruges, Belgium

Abstract

Small-diameter optical fiber with a 40-μm cladding diameter is suitable for an embedded sensor in a composite material, because it has high sensitivity and does not induce mechanical deterioration inside the structure. The bare small-diameter fiber outside the structure, however, is too fragile and hard to handle. In practical use, the small-diameter fiber needs to be joined to a normal optical fiber with a 125-μm cladding diameter. This paper presents estimation results of the joint loss between the small-diameter optical fiber and the normal optical fiber and two practical joining techniques, a detachable connector method and a permanent fused splice method. The joint losses were less than 1 dB for the both joining methods. These joining techniques promote the usage of the small-diameter optical fiber for practical heath monitoring systems.

Citation Download Citation

Seiji Kojima, Sinji Komatsuzaki, Akihito Hongo, Nobuo Takeda, and Tateo Sakurai "Joining techniques for small-diameter optical fiber used in embedded sensor", Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); https://doi.org/10.1117/12.623628

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