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. © 2009 IEEE.
Recommended Citation
J. Yang et al., "Highly Sensitive Refractive Index Optical Fiber Sensors Fabricated by a Femtosecond Laser," IEEE Photonics Journal, vol. 3, no. 6, pp. 1189 - 1197, article no. 6084805, Institute of Electrical and Electronics Engineers, Dec 2011.
The definitive version is available at https://doi.org/10.1109/JPHOT.2011.2176535
Department(s)
Mechanical and Aerospace Engineering
Second Department
Electrical and Computer Engineering
Publication Status
Open Access
Keywords and Phrases
Fiber optics systems; sensors; ultrafast lasers
International Standard Serial Number (ISSN)
1943-0655
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2024 The Authors, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution 4.0 License.
Publication Date
19 Dec 2011
Included in
Aerospace Engineering Commons, Electrical and Computer Engineering Commons, Mechanical Engineering Commons
Comments
National Natural Science Foundation of China, Grant 51005022