1 December 2009 Study and fabrication of add/drop filter based on Bragg gratings reflection coupler
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Proceedings Volume 7630, Passive Components and Fiber-based Devices VI; 763028 (2009) https://doi.org/10.1117/12.851547
Event: Asia Communications and Photonics, 2009, Shanghai, Shanghai , China
Double-grating coupler based on two fiber Bragg gratings(FBGs) has the advantages of compact structure and enhanced filtering efficiency. The influences of different gratings' position in the coupling region and grating length on the filtering spectra were investigated based on the unified coupled-mode theory. The results show that, the coupling region on the left of the graing mostly affects the drop channel characteristic;the length of the grating mostly affects the drop efficiency;the transmission characteristic is best with the whole length of the coupling region Lc integral multiple of coupling lengthπ /(2Kf ) .A coupler with uniform coupling region making of two photoconductive fibers was fabricated by improved fused taper technology,then two Bragg gratings were written in the coupling region with 248nm ultraviolet laser, and a grating reflecton coupler with maximum drop reflectivity 20dB and bandwidth 0.8nm was achieved.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Weiwei Jiang, Linyong Fan, Zhiming Liu, Peilin Tao, Jian Li, Shuisheng Jian, "Study and fabrication of add/drop filter based on Bragg gratings reflection coupler", Proc. SPIE 7630, Passive Components and Fiber-based Devices VI, 763028 (1 December 2009); doi: 10.1117/12.851547; https://doi.org/10.1117/12.851547

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