Laser light path alignment device and laser light path alignment method

Abstract

The embodiment of the invention discloses a laser light path alignment device and a laser light path alignment method. The laser light path alignment device comprises a front laser module, a power attenuation module and a rear laser module, wherein the front laser module is used for emitting a first laser beam, and the first laser beam has first power; the power attenuation module is located on the propagation path of the first laser beam and is used for at least adjusting the first laser beam to form a second laser beam, the second laser beam has second power, and the second power is smallerthan the first power; and the rear laser module is located on the propagation path of the second laser beam and comprises a laser gain crystal, and the geometric center of the gain crystal is in the optical axis direction of the second laser beam. Through the laser light path alignment device and the laser light path alignment method, the technical problems that in the prior art, thermal deformation of devices such as an optical crystal and a lens in a cavity of a pre-amplifier affects light path alignment due to output power of the pre-amplifier, and signal light with high-peak power densitydamages a laser gain crystal in a rear optical unit are solved.

Description

technical field [0001] Embodiments of the present invention relate to the field of laser technology, and in particular, to a laser optical path alignment device and a laser optical path alignment method. Background technique [0002] In recent years, near-infrared, green and ultraviolet light with high beam quality and high peak power has become a research hotspot in the field of lasers. Solid-state lasers based on multi-stage amplification structures are favored in the field of laser processing, especially fine processing, for their simple and compact structure, good stability, and high cost performance. [0003] In the optical path debugging of high-power multi-stage laser amplifiers, it is necessary to accurately couple the signal light output by the pre-laser pre-amplification stage to the post-amplification system. Alignment avoids the possibility of inefficiency or even damage to the optical crystal. Therefore, the high-power laser optical path alignment device and me...

AI Technical Summary

Problems solved by technology

[0005] In view of this, an embodiment of the present invention provides a laser optical path alignment device and a laser optical path alignment method to solve the problem of intracavity optical crystals in the preamplifier stage caused by increasing the output power of the preamplifier stage in the prior art. The influence of thermal deformation of components such as mirrors on optical path alignment and the technical problems of damage caused by high peak power density signal light to the laser gain crystal in the rear optical unit

Images