Optical Fiber Bragg Grating Michelson Interferometer |
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Authors: | JIANG Yi JIANG Tian-fu and LIU Li |
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Affiliation: | School of Information Science and Technology, Beijing Institute of Technology, Beijing 100081, China;China Civil Aviation Flight College, Guanghan, Sichuan 618307, China;School of Information Science and Technology, Beijing Institute of Technology, Beijing 100081, China |
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Abstract: | A new Michelson interferometer based on fiber Bragg grating(FBG) is demonstrated. FBGs are used as reflectors, and the laser is replaced by a broadband source as input light in this interferometer. To demodulate the signals, a 3×3 coupler is used as a splitter. By combining with software demodulation, the outer inter ference can be obtained from the outputs of the interferometer. This kind of in terferometer can also be wavelength-multiplexed easily by composing a series Michelson interferometer. The experiment results show that the clear interference fringe can be obtained by adjusting the path difference to make it less than interference length of FBG. The signals are also demodulated. |
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Keywords: | Michelson interferometer fiber Bragg grating |
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