Optical power parameter measurement method and device based on crystal resonator

Abstract

The invention discloses a method and device for measuring optical power parameters based on a crystal resonator, including a crystal resonator, an oscillating circuit and a frequency measurement unit, the input end of the oscillating circuit is connected to the electrode of the crystal resonator, and the The output end is electrically connected to the frequency measurement unit, and the light beam to be measured is incident on the working surface of the crystal resonator; the measurement method and device of the present invention reflect the incident laser light highly in application, which reduces the requirement for the measurement system to withstand laser radiation, It can be used to measure high-energy laser parameters under the condition of long-time light output. In the implementation, the power of the laser is converted into frequency measurement. Using the characteristics of high measurement accuracy and resolution of modern frequency measurement technology, it can meet the requirements of laser parameters under different power conditions. Measurement, strong applicability, large dynamic range, compact structure, simple engineering and so on.

Description

technical field [0001] The invention relates to a method and device for measuring optical power parameters, in particular to a method and device for measuring high-energy laser power parameters based on a crystal resonator. Background technique [0002] High-energy lasers refer to lasers with an average power greater than 10,000 watts, a duration of more than several seconds, and an output energy of more than tens of thousands of joules. They have important industrial and military application prospects. At present, the measurement method of high-energy laser power is mainly the photoelectric detection method. The laser is incident on the attenuation unit such as the integrating sphere and the optical attenuation film, and then the laser is incident on the surface of the photodetector after the light intensity is attenuated by a large multiple. By measuring the output signal and the attenuation coefficient value, we can get The power value of the laser. The problem with this...

AI Technical Summary

Problems solved by technology

The problem with this method is that for high-energy and high-power lasers, a large multiple of light intensity attenuation is required, so the attenuation coefficient of the attenuator needs to be accurately calibrated, resulting in a large measurement uncertainty

This method has a weak displacement signal caused by light pressure in the application, so it puts forward higher requirements on the accuracy and resolution of the displacement sensor, which limits the application of this method

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