Optical fiber laser sensor time division and wavelength division combined multiplexing method
A fiber laser and time division multiplexing technology, which is applied in the direction of using optical devices to transmit sensing components, the structure/shape of the active medium, etc., and can solve the problems of the maximum multiplexing number of only 16 array elements and a single wavelength division multiplexing technology.
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[0019] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
[0020] The time-division and wavelength-division joint multiplexing method of an optical fiber laser sensor comprises the following steps:
[0021] (1) Construct a time-division multiplexing structure: use an optical switch to modulate the intensity of the output light of the fiber laser in m channels to generate a narrow pulse optical signal with a high extinction ratio to achieve channel selection, use an m×1 type optical switch or use m independent optical switches, cooperate with m×1 beam combiner to realize channel selection of m channels, and then build a time division multiplexing structure;
[0022] (2) Time-division and wavelength-division joint multiplexing: use the wavelength-division multiplexing method to construct an n-element fiber laser sensor linear wavelength-division multiplexing array in each time-division multiplexing channe...
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