Optical-fiber low-coherence interference displacement demodulation device and method based on photoelectric oscillator
A photoelectric oscillator, low-coherence interference technology, applied in the direction of instruments, optical devices, measuring devices, etc., can solve the problems of small measurement range, poor long-term reliability and stability, and measurement accuracy only in the order of microns, and achieve system Effects of improved stability and simplified displacement demodulation method
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[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0029] See figure 1 , Is a schematic diagram of the optical fiber low-coherence interference displacement demodulation technology based on the photoelectric oscillator in the embodiment of the present invention. The system structure of this embodiment includes a broadband low-coherence light source, a first optical fiber coupler, a tunable optical retarder, a second optical fiber coupler, an electro-optical modulator, and a photodetector ...
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