Selected cladding mode recoupling based on cascaded LPG and TFBG for satellites vibration environment monitoring

Weisheng Liu; Tuan Guo; Chao Liu; Hwa-yaw Tam

doi:10.1117/12.2197794

8 October 2015 Selected cladding mode recoupling based on cascaded LPG and TFBG for satellites vibration environment monitoring

Weisheng Liu, Tuan Guo, Chao Liu, Hwa-yaw Tam

Author Affiliations +

Proceedings Volume 9679, AOPC 2015: Optical Fiber Sensors and Applications; 967909 (2015) https://doi.org/10.1117/12.2197794
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China

Abstract

Selected cladding mode recoupling between a long period grating (LPG) and a tilted fiber Bragg grating (TFBG) is demonstrated for satellites vibration environment monitoring. The mode recoupling characteristic between LPGs with different resonance wavelengths and TFBGs with different tilt angles are investigated. Strong coupling occurs between the two associated cladding modes of the same order over the overlapped resonance bands of the two gratings. Suppression ratio of over 20 dB between the recoupled cladding mode and the core reflection mode is achieved when the resonance wavelength of the LPG matches the Bragg wavelength of the TFBG. The present sensor has the features of cost-effective power detection and tip-reflection sensing ability, and give a remarkably simple and elegant approach to dynamic vibration monitoring.

Citation Download Citation

Weisheng Liu, Tuan Guo, Chao Liu, and Hwa-yaw Tam "Selected cladding mode recoupling based on cascaded LPG and TFBG for satellites vibration environment monitoring", Proc. SPIE 9679, AOPC 2015: Optical Fiber Sensors and Applications, 967909 (8 October 2015); https://doi.org/10.1117/12.2197794

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