Laser power control system and laser heating system

Abstract

The invention discloses a laser power control system, comprising an optical polarization module, an electromechanical control system, a laser power detection system, a temperature monitoring system and a microscopic observation system, wherein the electromechanical control system comprises a rotary table and a stepper motor controller; the laser power detection system comprises a power meter and a power reader; the microscopic observation system comprises a camera and a monitor; the optical polarization module comprises a lambda / 4 wave plate and a polarization beam splitter; and the electromechanical control system controls movement and rotation of the optical polarization module. The invention also discloses a laser heating system. The laser power control system and the laser heating system can effectively control power of laser heating and can acquire stable, adjustable and evenly-distributed sample temperature in a diamond anvil cell (DAC).

Description

technical field [0001] The invention relates to a laser heating system and a laser power control system, in particular to a high-pressure and high-temperature in-situ test based on a diamond anvil (DAC), which can effectively control the heating spot while ensuring a uniform and stable heating spot. Laser heating system and laser power control system to control the temperature of the sample in the pressure chamber. Background technique [0002] In the laser heating high-pressure experiment using diamond anvil, the temperature of the sample is obtained by absorbing the high-power infrared laser. In the experiment, it is necessary to change the laser power to irradiate the sample to obtain different temperatures. The usual method is to adjust the working current of the laser. Since the lamp-pumped high-power infrared laser used in the DAC laser heating experiment can only have a good mode output when it works at the maximum current, so changing the laser power irradiating the...

AI Technical Summary

Problems solved by technology

Since the lamp-pumped high-power infrared laser used in the DAC laser heating experiment can only have a good mode output when it works at the maximum current, so changing the laser power irradiating the sample by adjusting the working current of the laser cannot guarantee the output. The laser beam has a uniform power distribution, resulting in a very uneven temperature distribution in the heating area of ​​the sample, which affects the reliability of the experimental data

Another problem is that the mode of the laser is in an unstable state when it deviates from the working current, which causes a large random change in power, and it is difficult to obtain a stable temperature on the sample.

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