OPTICAL FIBER GRATING SENSING DEMODULATION DEVICE CAPABLE OF FLUCTUATION SUPPRESSION UNDER VARYING TEMPERATURE ENVIRONMENT AND DEMODULATING METHOD

摘要

An optical fiber grating sensing demodulation device capable of fluctuation suppression under a varying temperature environment and a demodulation method therefor. The demodulation device comprises a broadband light source (1), an optical attenuator (2), a tunable F-P filter (3), a first optical fiber isolator (41), an erbium-doped optical fiber amplifier (5), an optical fiber primary beam splitter (6), a first optical fiber secondary beam splitter (71), an optical fiber circulator (8), an optical fiber grating sensing array (9), a first photoelectric detector array (161), an optical fiber air chamber (10), a second optical fiber secondary beam splitter (72), an optical fiber F-P etalon (11), a notching filter (12), an optical fiber auxiliary interferometer (13) composed of a second optical fiber isolator (42), an optical fiber coupler (14), a faraday polariscope (15) and a second photoelectric detector array (162), a data acquisition card (17), and a processor (18).