Semiconductor laser device and solid laser device using same

Abstract

A semiconductor laser device with the energy density increased at the focal point and a LD pumped solid-state laser device configured of the particular semiconductor laser device are provided. A stack array laser element for radiating a two-dimensional array of laser beams includes a plurality of parallel laser beam columns each aligned in the form of dotted lines. In front of the stack array laser element; each laser beam column collimated by being refracted in the direction substantially perpendicular to the direction of the dotted line is received, and radiated by turning at right angles to the direction of the laser beams from each emitter or emitter group. In this way, the laser beams are converted into a plurality of substantially ladder-shaped parallel laser beam columns. These parallel laser beam columns are compressed to form parallel laser beam columns in alignment. Each compressed one of parallel laser beam columns is turned at right angles and radiated. Thus, all the laser beams are converted into a plurality of aligned parallel laser beams, which are collimated and condensed at a focal point.

Description

technical field [0001] The invention relates to a beam converter for lamination array laser diodes and a laser device using the beam converter. The present invention also relates to a semiconductor laser light concentrator for converging semiconductor laser light into tiny light spots, and a semiconductor laser excitation solid-state laser device for optically exciting a solid-state laser device through semiconductor laser light. Background technique [0002] For laser processing, lasers for medical purposes use YAG (yttrium aluminum garnet). However, YAG, which is a solid-state laser, has low conversion efficiency from electricity to light. The reason is that due to the Xe lamp used for the excitation of solid-state lasers in the past, the luminous efficiency of the flash lamp is low. In addition, the luminous spectrum band is also wide, so only a small part of the luminous energy can be used for solid-state lasers. Laser excitation. This often necessitates the use of la...

AI Technical Summary

Problems solved by technology

[0019] However, as mentioned above, the stacked array semiconductor laser generating element uses a lens to converge the emitted light from the semiconductor laser generating element and focus it. The vertical component can be focused more easily. However, since the entire width of the light source is large, Therefore, it is difficult to focus the parallel component into a tiny light spot

[0020] If such a stacked array semiconductor laser is intended to be used as an excitation light source, as mentioned above, since the width of the array is within the range of 1 cm, it is impossible to use a common lens system to focus multiple beams into a single spot. , the end face excitation method with good excitation efficiency cannot be used, so it can only be used in the side excitation method

Images