Distributed optical fiber sensor based on Raman and Brillouin scattering
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United States of America Patent
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Jul 22, 2014
Grant Date -
Jan 24, 2013
app pub date -
Aug 20, 2010
filing date -
Apr 13, 2010
priority date (Note) -
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Abstract
A distributed optical fiber sensor based on Raman and Brillouin scattering is provided. The distributed optical fiber sensor includes a semiconductor FP cavity pulsed wideband optical fiber laser (11), a semiconductor external-cavity continuous narrowband optical fiber laser (12), a wave separator (13), an electro-optic modulator (14), an isolator (15), an Er-doped optical fiber amplifier (16), a bidirectional coupler (17), an integrated wavelength division multiplexer (19), a first photoelectric receiving and amplifying module (20), a second photoelectric receiving and amplifying module (21), a direct detection system (22), a narrowband optical fiber transmission grating (23), a circulator (24) and a coherence detection module (25). The temperature and the strain can be measured simultaneously, and the signal-to-noise ratio of the system is enhanced.
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International Classification(s)
- G01K:MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT;....
- G01J:MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTE....
- G01L:MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL ....
- H01S:DEVICES USING STIMULATED EMISSION
- G01B:MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIME....
- G01D:MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VAR....
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