A lock-in amplifier suitable for laser frequency locking

Abstract

The invention relates to a laser frequency locking technology, in particular to a phase-locking amplifier suitable for laser frequency locking. It solves the problems that the operating frequency range or optimal operating frequency range of the existing commercial lock-in amplifier does not necessarily include the modulation frequency of the error signal, the continuous adjustment of phase shift and gain cannot be realized, the independent adjustment of the monitored error signal cannot be realized, and the cost is high. . A lock-in amplifier suitable for laser frequency locking includes a first BNC connector, a first resistor, a first LC filter circuit, a second LC filter circuit, a first non-inverting amplifier circuit, a first RC filter circuit, a mixer, The second BNC connector, the isolation circuit, the phase shift circuit, the first inverting amplifier circuit, the seventeenth resistor, the third BNC connector, the second inverting amplifier circuit, the second RC filter circuit, the third RC filter circuit, the second Non-inverting amplifier circuit, twenty-sixth resistor, fourth BNC connector, bias amplifier circuit, thirty-first resistor, fifth BNC connector. The present invention is suitable for laser frequency locking.

Description

technical field [0001] The invention relates to a laser frequency locking technology, in particular to a phase-locked amplifier suitable for laser frequency locking. Background technique [0002] With the continuous development and innovation of laser technology, laser has been widely used in industry, medical, military, precision measurement and communication. In practical applications, in order to overcome the influence of environmental temperature, external mechanical vibration and other factors on the laser frequency, the laser frequency is often locked to the resonance transition frequency of atoms, molecules or F-P cavity. However, before locking the laser frequency, a lock-in amplifier needs to be used to modulate and demodulate the absorption signal containing the resonant transition frequency of atoms, molecules or F-P cavity, so as to output the error signal for locking the laser frequency. Under the existing technical conditions, commercial lock-in amplifiers gen...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing commercial lock-in amplifier operating frequency range or optimal operating frequency range does not necessarily include the modulation frequency of the error signal, the continuous adjustment of the phase shift and gain cannot be realized, the independent adjustment of the monitored error signal cannot be realized, and the cost is high. problem, a lock-in amplifier suitable for laser frequency locking is provided

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