Highly sensitive refractive index optical fiber sensors fabricated by a femtosecond laser

Jinpeng Yang; Lan Jiang; Sumei Wang; Qianghua Chen; Benye Li; Hai Xiao

doi:10.1109/JPHOT.2011.2176535

Highly sensitive refractive index optical fiber sensors fabricated by a femtosecond laser

Jinpeng Yang, Lan Jiang^*, Sumei Wang, Qianghua Chen, Benye Li, Hai Xiao

^*Corresponding author for this work

School of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

28 Citations (Scopus)

Abstract

Highly sensitive and robust refractive index (RI) fiber sensors are proposed, which are based on concatenating two micro air-cavities. The micro air-cavities embedded in the fiber along the core axis are fabricated by combining the techniques of femtosecond laser micromachining and arc fusion splicing. The full-width at half-maximum (FWHM) of an attenuation peak of a sensor in air is 0.048 nm, and the extinction ratio is ∼15 dB. When the diameter of the cavity is slightly larger than the fiber core diameter, the sensor is highly sensitive to external RI changes. A high sensitivity of 172.4 nm/refractive index unit (RIU) around the RI range of 1.333-1.365 is achieved, which is about six times higher than long-period fiber grating (LPFG)-type and taper-type RI sensors in the same RI range.

Original language	English
Article number	6084805
Pages (from-to)	1189-1197
Number of pages	9
Journal	IEEE Photonics Journal
Volume	3
Issue number	6
DOIs	https://doi.org/10.1109/JPHOT.2011.2176535
Publication status	Published - 2011

Keywords

Fiber optics systems
sensors
ultrafast lasers

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Yang, J., Jiang, L., Wang, S., Chen, Q., Li, B., & Xiao, H. (2011). Highly sensitive refractive index optical fiber sensors fabricated by a femtosecond laser. IEEE Photonics Journal, 3(6), 1189-1197. Article 6084805. https://doi.org/10.1109/JPHOT.2011.2176535

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AU - Xiao, Hai

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Highly sensitive refractive index optical fiber sensors fabricated by a femtosecond laser

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Keywords

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