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Proceedings Paper

Smart structure of fiber pigtails used in medical laser instruments
Author(s): Weiping Liu; Weichong Du; Ge Du
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Paper Abstract

A new type pigtail structure with multi-functionality is proposed. The pigtail is imprinted a length of grating or grating module in it, which can act as sensing element for measuring temperature and/or stain around. Two types of sensing element in the structure are given, one is just one length of FBG and another is the FBG module, which is composed of two identical Bragg gratings separated by a cavity along a single fiber, where the cavity is a segment of the fiber that has photo-elastic and/or thermo-optic coefficients different from that of the gratings. The operational principle of the corresponding sensing structure is analyzed in detail. It is demonstrated that by measuring the reflected spectra from the FBG, the temperature and/or stain can be determined. On the other hand, by simply measuring optical power of the reflected light reflected, the temperature or stain can be independently determined.

Paper Details

Date Published: 18 January 2005
PDF: 7 pages
Proc. SPIE 5630, Optics in Health Care and Biomedical Optics: Diagnostics and Treatment II, (18 January 2005); doi: 10.1117/12.572921
Show Author Affiliations
Weiping Liu, Jinan Univ. (China)
Weichong Du, Innovation Technology Co., Ltd (China)
Ge Du, Guang Cable Networks Ltd. (China)


Published in SPIE Proceedings Vol. 5630:
Optics in Health Care and Biomedical Optics: Diagnostics and Treatment II
Britton Chance; Mingzhe Chen; Arthur E. T. Chiou; Qingming Luo, Editor(s)

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