Study on demodulating wide range off-centering of distributed FBG by AWG

Xu Wan; BaoJin Peng; YaQiang Shen; HongZhen Jin

doi:10.1117/12.828793

20 May 2009 Study on demodulating wide range off-centering of distributed FBG by AWG

Xu Wan, BaoJin Peng, YaQiang Shen, HongZhen Jin

Proceedings Volume 7283, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 72833V (2009) https://doi.org/10.1117/12.828793
Event: AOMATT 2008 - 4th International Symposium on Advanced Optical Manufacturing, 2008, Chengdu, Chengdu, China

Abstract

According to the deficiencies of static demodulating method of Arrayed Waveguide Grating (AWG) for Fiber Bragg Grating (FBG) reflecting wave wavelength and the characteristic of central wavelength of tunable AWG shifting with applied voltage, the dynamic demodulating method based on tunable AWG for FBG's central wavelength wide-range is presented. The experiment systems are set up with tunable AWG, adjustable voltage source, photomultiplier, data acquisition card, and computer. Experiment results show that the system can effectively resolve the problems of measurement wide-range off-centering for the FBG, and computer can real-timely report the results of off-centering of the FBG central wavelength. AWG with the 2nm channel-spacing is used to demodulate, and the off-centering range of reflecting wave wavelength of the measured FBG reach 6nm, its measurement error is less than 0.02%.

Citation Download Citation

Xu Wan, BaoJin Peng, YaQiang Shen, and HongZhen Jin "Study on demodulating wide range off-centering of distributed FBG by AWG", Proc. SPIE 7283, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 72833V (20 May 2009); https://doi.org/10.1117/12.828793

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