Device and method for eliminating back light signal by utilizing dual-optical switch

Abstract

The invention relates to an optical signal detection technology, in particular to a device and a method for eliminating a back light signal by utilizing a dual-optical switch. The invention solves the problem that the existing back light restraining technology can not eliminate the back light signal which is synchronous with a pulse laser signal and has the same frequency with the pulse laser signal. The device for eliminating the back light signal by utilizing the dual-optical switch comprises a pulse laser, a practice target, the dual-optical switch, a single photon detector and a computer, wherein the dual-optical switch comprises a first acoustic optical modulator and a second acoustic optical modulator; the external trigger input end of the pulse laser is connected with a pulse signal generator; and the external trigger input end of the pulse signal generator is connected with a function signal generator, and the output end of the pulse signal generator is connected with a time-to-amplitude converter. The invention solves the problem that the existing back light restraining technology can not eliminate the back light which is synchronous with the pulse laser signal and has the same frequency with the pulse laser signal, and is suitable for weak pulse laser signal detection in the fields of precision measurement, communication, information processing, military and the like.

Description

technical field [0001] The invention relates to optical signal detection technology, in particular to a device and method for eliminating background optical signals by using double optical switches. Background technique [0002] Pulsed lasers are widely used in precision measurement, communication and information processing, and military fields. In the application field of pulsed lasers, it is generally required that the pulsed laser signal output by the pulsed laser has a higher signal-to-background ratio. However, in practical applications, the signal-to-background ratio of weak pulsed laser signals is often low. In the presence of astigmatism, etc.), the pulsed laser signal will be interfered by the background light and cannot be effectively detected. Therefore, it is particularly important to suppress the interference of the background light to improve the signal-to-background ratio of the pulsed laser signal. At present, the suppression of background light interferenc...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing background light suppression technology cannot eliminate the background light that is synchronized with the pulse laser signal and has the same frequency, the present invention provides a device and method for eliminating the background light signal by using a double optical switch

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