Tunable phase-shifted FBG based on an in-grating bubble

Changrui Liao; Lei Xu; Yiping Wang; D. N. Wang; Qiao Wang; Zhengyong Li; Xiaoyong Zhong; Jiangtao Zhou; Yingjie Liu

doi:10.1117/12.2059446

2 June 2014 Tunable phase-shifted FBG based on an in-grating bubble

Changrui Liao, Lei Xu, Yiping Wang, D. N. Wang, Qiao Wang, Zhengyong Li, Xiaoyong Zhong, Jiangtao Zhou, Yingjie Liu

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 915778 (2014) https://doi.org/10.1117/12.2059446
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

We present a new type of phase-shifted FBGs based on an in-grating bubble fabricated by femtosecond laser ablation together with fusion splicing technique. A micro-channel vertically crossing the bubble is drilled by femtosecond laser to allow liquid to flow in or out. By filling different refractive index liquid into the bubble, the phase-shift peak is found to experience a linear red shift with the increase of refractive index. Such a PS-FBG could be used to develop a promising tunable optical filter and sensor.

Citation Download Citation

Changrui Liao, Lei Xu, Yiping Wang, D. N. Wang, Qiao Wang, Zhengyong Li, Xiaoyong Zhong, Jiangtao Zhou, and Yingjie Liu " Tunable phase-shifted FBG based on an in-grating bubble", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 915778 (2 June 2014); https://doi.org/10.1117/12.2059446

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