Research on spectroscopic technique of fiber Bragg grating for all-fiber rotational Raman lidar

Abstract

Abstract:

An all-fiber rotational Raman lidar spectroscope constructed by fiber Bragg grating and fiber coupler in visible region is designed. The fiber Bragg grating with 530-nm central wavelength is successfully fabricated through phase mask directly inscribing, and then its transmissivity and reflectivity are experimentally tested. The high tuning sensitivity cantilever system is designed to enhance the matching performance between the central wavelength of fiber Bragg grating and the rotational Raman spectral line of atmosphere molecules. The experimental results show that the fiber Bragg grating in visible region successfully fabricated possesses 95% reflectivity and 0.3-nm full width at half maximum, and that the strain tuning system may possess sensitivity of 18 pm/r within the ± 0.6 nm range.

Key words: remote sensing, rotational Raman lidar, all-fiber spectroscope, fiber Bragg grating, cantilever tuning

LI Shi-chun, HUA Deng-xin, SONG Yue-hui, XIN Wen-hui, ZHANG Ai. Research on spectroscopic technique of fiber Bragg grating for all-fiber rotational Raman lidar[J]. J4, 2013, 30(1): 110-115.

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