Brillouin scattering underwater laser imaging detector based on photonic crystal filter

Abstract

The invention discloses a Brillouin scattering underwater laser imaging detector based on photonic crystal filter, comprising an impulse generator, a laser controller, a strobe controller, a logic processing component, a blue-green laser, a scanner, a Brillouin scattering filter, a strobe signal receiver, a signal processing component and a monitor, wherein the impulse generator is respectively connected to the laser controller, the strobe controller and the logic processing component; and the laser controller is connected to the blue-green laser. In the invention, a method of photonic crystal filter is used for collecting Brillouin scattering signals, displacing the currently adopted F-P (Fabry-Perot) interferometer, or the edge detection technology based on a bromine and iodine molecular filter, so that high requirements to the parallelism of incidents lights are not needed due to quite small solid angles received by the F-P interferometer, and bromine and iodine steams do not need constant temperature control due to the poor stability of spectral absorption of the bromine and iodine molecular filter; the use is simple and convenient.

Description

technical field [0001] The invention belongs to underwater photoelectric imaging detection technology, in particular to a Brillouin scattering underwater laser imaging detection device based on photonic crystal filtering. Background technique [0002] In recent years, underwater photoelectric imaging detection technology has been paid more and more attention by researchers from various countries because of its extensive and important application value in underwater target discovery, sea surface material detection and marine geographic engineering. However, unlike the imaging technology in the air we usually see, the characteristics of the water medium are strong scattering effect and fast absorption power attenuation. The effect is strong, resulting in large image noise, poor imaging quality, limited operating distance of the system, and low detection sensitivity. [0003] In order to solve this problem, the concept of underwater photoelectric imaging detection based on Bri...

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Problems solved by technology

However, this technology requires constant temperature control of bromine and iodine va

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