Laser luminance adjustment assembly and laser

Abstract

The invention discloses a laser luminance adjustment assembly and a laser, and relates to the technical field of the laser. The laser luminance adjustment assembly comprises a first polarizing film and a second polarizing film; the first polarizing film is fixedly connected with the laser through a clamp assembly; the second polarizing film is connected with the laser through a clamp assembly, andthe laser luminance adjustment assembly can rotate around the central connecting line of the first polarizing film and the second polarizing film; or the first polarizing film is connected with the laser through a clamp assembly; the laser luminance adjustment assembly can rotate around the central connecting line of the first polarizing film and the second polarizing film; and the second polarizing film is fixedly connected with the laser through a clamp assembly. The polarizing films have shielding and penetration functions on the incident light, so that laser luminance adjustment can be realized.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a laser brightness adjustment component and a laser. Background technique [0002] With the rapid development of laser technology, laser technology plays an increasingly important role in various fields, from military to civilian, from scientific research to teaching, from industry to agricultural and sideline industries and many other fields. At the same time, in engineering applications, the requirements for laser reliability, engineering, stability, assembleability, versatility, and easy operation are getting higher and higher. [0003] The existing single pulse width laser output can no longer meet the application requirements of customers in many occasions. At present, the scheme of realizing adjustable pulse width is mainly realized by chopper switch outside the laser resonator. This scheme with tunable pulse width has several disadvantages: First, this scheme can only real...

AI Technical Summary

Problems solved by technology

[0003] The existing single pulse width laser output can no longer meet the application requirements of customers in many occasions

At present, the scheme of realizing adjustable pulse width is mainly realized by chopper switch outside the laser resonator. This scheme with tunable pulse width has several disadvantages: First, this scheme can only realize the output pulse width of the original laser resonator. Under the premise of chopping to the short pulse width but not to the direction of long pulse width, that is, the pulse width can only be shortened and cannot be lengthened; secondly, chopping is obtained at the cost of a huge waste of energy, for example, To change from the 50 nanosecond pulse output of the resonant cavity to the 5 nanosecond pulse output, 10 times the energy will be wasted, and this part of energy will be reflected into the receiving device in the cavity through the polarizer, so when doing high-power or When chopping with high energy, it may also cause the receiving device to be dusted by the high-energy laser or cause the receiving device to be extremely heated, which will affect the stability of the whole machine; moreover, the effect of chopping depends largely on the Poke The drive power supply of the ear box, the power supply must not only realize the delay synchronization with the output pulse of the oscillator stage, but also ensure that the speed of the rising edge and falling edge is fast enough, which greatly increases the complexity of the whole machine and reduces the reliability. sex, and increases the cost

The first type is to change the output laser power by changing the injection power of the laser. This type of method has the disadvantage that the laser beam takes a long time to reach a stable state, so it takes a long time to complete the power adjustment.

The second type is to change the output laser power through the attenuation device of the external optical path. Most of the attenuation devices are multi-level devices with different transmittances. This type has the disadvantage that the laser power cannot be continuously adjusted, so it is not easy to find the best process parameters. less than expected effect

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