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Proceedings Paper

Direct inscription of intrinsic Fabry-Perot interferometers in optical fiber tapers with a femtosecond laser
Author(s): Jinlong Li; Xiaobei Zhang; Wenyuan Wang; Fufei Pang; Yunqi Liu; Tingyun Wang
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Paper Abstract

In this work, we report a sensing configuration of the fiber taper intrinsic Fabry-Perot interferometer directly inscribed in single-mode optical fiber tapers with different waist diameters from 14 to 80 μm using a femtosecond laser micromachining system. By controlling the inscribing depth and intensity of the fs laser pulse, the fringe visibility can exceed 9.0 dB when the fiber taper waist diameter is around 15 μm, which is sufficient for most sensing applications. The sensor sensitivity depends on the fiber taper waist diameter, while a smaller diameter corresponds to a large sensitivity. Different free spectral ranges can be achieved for various cavity lengths. Such a structure can combine the high sensitivity properties of fiber taper sensors with the high resolution features of Fabry-Perot interferometer sensors. Meanwhile, this structure can have a number of outstanding advantages, such as its small size, unique geometry, easy fabrication, low cost and capability for mass production. These fiber taper intrinsic Fabry-Perot interferometer sensors have high potential in fast detection and high precision measurement while maintaining superior reliability for chemical and biological sensing.

Paper Details

Date Published: 29 November 2011
PDF: 6 pages
Proc. SPIE 8307, Passive Components and Fiber-Based Devices VIII, 83070F (29 November 2011); doi: 10.1117/12.905596
Show Author Affiliations
Jinlong Li, Shanghai Univ. (China)
Xiaobei Zhang, Shanghai Univ. (China)
Wenyuan Wang, Shanghai Univ. (China)
Fufei Pang, Shanghai Univ. (China)
Yunqi Liu, Shanghai Univ. (China)
Tingyun Wang, Shanghai Univ. (China)


Published in SPIE Proceedings Vol. 8307:
Passive Components and Fiber-Based Devices VIII

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