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Proceedings Paper

Tapered optcial fiber fabricated by high-frequency pulsed carbon dioxide laser
Author(s): Ming Li; Fufei Pang; Hairun Guo; Yunqi Liu; Na Chen; Zhenyi Chen; Tingyun Wang
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Paper Abstract

In this paper, a new method was proposed to fabricate tapered optical fiber which has strong evanescent field in the tapered region. Our system relies on a scanned high-frequency pulsed carbon dioxide laser (CO2 laser) beam across the taper region. The optimal heating and stretching parameters were determined through a series experiments. An effective laser scanning pattern was designed to obtain a relatively uniform temperature field. Symmetrical fiber tapers with taper waist diameters of ~10-20μm, overall lengths of ~10-17mm and transmission losses of ~0.8-3dB at 1550nm were obtained. The taper profile was measured which presents a good fit with the "decaying-exponential" model. The "selfregulating" law is demonstrated, which shows the desired taper waist diameter as a function of the laser power. A refractive index sensing experiment using the tapered optical fiber is also studied to show the potential application in refractive index sensor.

Paper Details

Date Published: 9 November 2010
PDF: 6 pages
Proc. SPIE 7853, Advanced Sensor Systems and Applications IV, 78533E (9 November 2010); doi: 10.1117/12.870619
Show Author Affiliations
Ming Li, Shanghai Univ. (China)
Fufei Pang, Shanghai Univ. (China)
Hairun Guo, Shanghai Univ. (China)
Yunqi Liu, Shanghai Univ. (China)
Na Chen, Shanghai Univ. (China)
Zhenyi Chen, Shanghai Univ. (China)
Tingyun Wang, Shanghai Univ. (China)

Published in SPIE Proceedings Vol. 7853:
Advanced Sensor Systems and Applications IV
Brian Culshaw; Yanbiao Liao; Anbo Wang; Xiaoyi Bao; Xudong Fan; Lin Zhang, Editor(s)

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