Tapered optcial fiber fabricated by high-frequency pulsed carbon dioxide laser

Ming Li; Fufei Pang; Hairun Guo; Yunqi Liu; Na Chen; Zhenyi Chen; Tingyun Wang

doi:10.1117/12.870619

9 November 2010 Tapered optical fiber fabricated by high-frequency pulsed carbon dioxide laser

Ming Li, Fufei Pang, Hairun Guo, Yunqi Liu, Na Chen, Zhenyi Chen, Tingyun Wang

Proceedings Volume 7853, Advanced Sensor Systems and Applications IV; 78533E (2010) https://doi.org/10.1117/12.870619
Event: Photonics Asia 2010, 2010, Beijing, China

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.

Citation Download Citation

Ming Li, Fufei Pang, Hairun Guo, Yunqi Liu, Na Chen, Zhenyi Chen, and Tingyun Wang "Tapered optical fiber fabricated by high-frequency pulsed carbon dioxide laser", Proc. SPIE 7853, Advanced Sensor Systems and Applications IV, 78533E (9 November 2010); https://doi.org/10.1117/12.870619

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