Lasers, Fiber Optics, and Communications

All-fiber electric field sensor based on whispering-gallery-mode resonances in U-bent single-mode fibers integrated with liquid crystal

[+] Author Affiliations
Ningning Gu, Hao Zhang, Bo Liu, Wei Lin, Binbin Song, Jixuan Wu

Nankai University, Institute of Modern Optics, Key Laboratory of Optical Information Science and Technology, Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Ministry of Education, Tianjin 300350, China

Opt. Eng. 56(2), 026102 (Feb 01, 2017). doi:10.1117/1.OE.56.2.026102
History: Received September 9, 2016; Accepted January 11, 2017
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Abstract.  We propose an all-fiber electric field sensor using a U-bent single-mode fiber integrated with liquid crystal. The sensing mechanism is based on the interference between whispering-gallery modes and core mode in U-shaped bent fibers. We have experimentally investigated the influences of applied electric voltage as well as polarization state of the incident light on the transmission spectral characteristics of the proposed electric field sensor. The experimental results indicate that the transmission spectra are highly sensitive to the applied voltage and the highest sensitivity reaches 20.4221  nm/kV. The dip wavelengths and transmission loss at transmission dip exhibit a periodic variation behavior in response to the light polarization state rotation by 360 deg, which is in agreement with our theoretical analysis.

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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Ningning Gu ; Hao Zhang ; Bo Liu ; Wei Lin ; Binbin Song, et al.
"All-fiber electric field sensor based on whispering-gallery-mode resonances in U-bent single-mode fibers integrated with liquid crystal", Opt. Eng. 56(2), 026102 (Feb 01, 2017). ; http://dx.doi.org/10.1117/1.OE.56.2.026102


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