Fabrication of deuterium-loaded fiber Bragg grating and its spectral characteristics in thermal annealing

MingChang Shih; C. C. Wang; Cheng-Tsang Yu; Tung J. Chuang

doi:10.1117/12.390539

4 July 2000 Fabrication of deuterium-loaded fiber Bragg grating and its spectral characteristics in thermal annealing

MingChang Shih, C. C. Wang, Cheng-Tsang Yu, Tung J. Chuang

Proceedings Volume 4082, Optical Sensing, Imaging, and Manipulation for Biological and Biomedical Applications; (2000) https://doi.org/10.1117/12.390539
Event: Photonics Taiwan, 2000, Taipei, Taiwan

Abstract

Previous results showed that the non-reversible (hystersis loop) of Bragg wave length shifting in thermal cycling of the Fiber Bragg Grating which is a high germanium doped optical fiber and high pressure hydrogen loaded was due to the diffusion out of the H₂ residue in thermal annealing. In addition, the O-H absorption peak (1.38nm) causes signal attenuation and stability problem in FBG applications. We demonstrated up to 250 degree(s) C. The spectrum characteristics of the D₂ loaded FBG compared to the H₂ loaded FBG is presented. In general, (Delta) (Lambda) _B of the D₂ loaded FBG is narrower than H₂ loaded, and (Lambda) _B of the D₂ loaded FBG is more stable than H₂ loaded in thermal annealing. A model base on the UV photo-induced index change in the BFG core with D₂ and H₂ loaded to explain the spectrum characteristics between D₂ and H₂ loaded FBG is discussed.

Citation Download Citation

MingChang Shih, C. C. Wang, Cheng-Tsang Yu, and Tung J. Chuang "Fabrication of deuterium-loaded fiber Bragg grating and its spectral characteristics in thermal annealing", Proc. SPIE 4082, Optical Sensing, Imaging, and Manipulation for Biological and Biomedical Applications, (4 July 2000); https://doi.org/10.1117/12.390539

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