Single-radio source-driven dual-acoustic optical filter component secondary acousto-optic filtering device and method

Abstract

The invention discloses a single-radio source-driven dual-acoustic optical filter component secondary acousto-optic filtering device and method. The single-radio source-driven dual-acoustic optical filter component secondary acousto-optic filtering device comprises a radio source, a computer, and a broadband light source, a beam collimator, a first acousto-optic filtering component, a second acousto-optic filtering component and a spectrum detector, which are orderly connected; the computer is connected with the first acousto-optic filtering component, the second acousto-optic filtering component, the radio source and the spectrum detector, respectively; the radio source is connected with the first acousto-optic filtering component and the second acousto-optic filtering component, respectively; the beam collimator converges and aligns the light of the broadband light source so as to form parallel light beams; the first acousto-optic filtering component performs first acousto-optic filtering on the parallel light beams; the second acousto-optic filtering component performs second acousto-optic filtering on the light beams subjected to first acousto-optic filtering; the light beams subjected to the second acousto-optic filtering are output to the spectrum detector; and the spectrum detector collects spectral information and outputs the spectral information to the computer. According to the single-radio source-driven dual-acoustic optical filter component secondary acousto-optic filtering device and method in the invention, the two acousto-optic filtering components can be simultaneously controlled through one radio source, thereby realizing twice acousto-optic filtering and improving the spectral resolution.

Description

technical field [0001] The invention relates to the field of acousto-optic filtering, in particular to a secondary acousto-optic filtering device and method of a double acousto-optic filter component driven by a single radio frequency source. Background technique [0002] The acousto-optic filter component is a filter device widely used in the field of optics. Its working principle is: the radio frequency signal generates ultrasonic waves in the acousto-optic crystal through the transducer, and the ultrasonic wave generates periodic modulation on the acousto-optic crystal during the transmission process in the acousto-optic crystal. When the broadband signal light passes through the acousto-optic crystal modulated by ultrasonic wave, it will interact with the ultrasonic wave, and when the momentum matching condition is met, the signal light with a certain wavelength in the broadband signal light will be diffracted to realize narrow-band filtering. Moreover, the wavelength o...

AI Technical Summary

Problems solved by technology

This means that it is not possible to simultaneously control two AOFs with one RF source

Therefore, in the actual secondary acousto-optic filtering process, it is necessary to independently adjust the two radio frequency sources in order to control the frequency difference between the two radio frequency signals and realize the secondary acousto-optic filtering. The operation is complicated and affects the efficiency of acousto-optic filtering.

In addition, the use of two radio frequency sources increases the cost of the device, limiting the wide application of the device and method

Images