23 April 2017 Ultrafast laser-induced negative-index fiber Bragg gratings with enhanced thermal stability
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Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103235G (2017) https://doi.org/10.1117/12.2267526
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of
Abstract
Negative-index fiber Bragg gratings (FBGs) were fabricated using 800 nm femtosecond laser overexposure and thermal regeneration. A positive-index type I-IR FBG was first inscribed in H2-free fiber with a uniform phase mask, and then a highly polarization dependent phase-shifted FBG (PSFBG) was created from the type I-IR FBG by overexposure. Subsequently, the PSFBG was annealed at 800 °C for 12 hours. A negative-index FBG was obtained with a reflectivity of 99.22%, an insertion loss of 0.08 dB, a blue-shift of 0.83 nm, and an operating temperature of up to 1000 °C.
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Jun He, Jun He, Changrui Liao, Changrui Liao, Kaiming Yang, Kaiming Yang, Yiping Wang, Yiping Wang, } "Ultrafast laser-induced negative-index fiber Bragg gratings with enhanced thermal stability", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103235G (23 April 2017); doi: 10.1117/12.2267526; https://doi.org/10.1117/12.2267526
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