Optical beam collimation method for laminated impulse semiconductor laser

Abstract

A method for collimating the beams of a laminated pulse semiconductor laser belongs to the technical field of manufacturing a semiconductor laser device. The prior art adopts an array lens to realize the plastic of the beams of a semiconductor laser array and the discreteness of the related array lens and the semiconductor laser array is smaller. The invention aims at realizing the collimation of the beams of the laminated pulse semiconductor laser, thereby improving coupling efficiency. The invention is characterized in that the invention adopts an collimating lens holding frame which is vertically arranged on a heat sink; an illuming area of each single tube in the laminated pulse semiconductor laser is opposite to a V-shaped slot on the collimating lens holding frame; a fine adjusting frame is adopted to clamp the collimating lens holding frame and an collimating post lens and the space position between the collimating lens holding frame and the collimating post lens are finely adjusted until a rectangle plane of the collimating lens holding frame is parallel to the illuming surface of the laminated pulse semiconductor laser; the beams exited by the collimating post lens meet the collimation requirement for beams; the collimating lens holding frame is fixed on the heat sink by an adhesive and the collimating post lens is fixed in the V-shaped slot; then the position adjustment and fixing of each collimating post lens are finished in the V-shaped slot one by one.

Description

technical field [0001] The invention relates to a method for collimating an array semiconductor laser beam to realize high-efficiency coupling with an optical fiber, and belongs to the technical field of semiconductor laser device manufacturing. Background technique [0002] In order to improve the output power of semiconductor laser devices, the use of arrays is an effective way to achieve this purpose. Since high-power semiconductor lasers have serious astigmatism, especially in the fast axis direction, the divergence angle is as high as 60-80°. In order to achieve efficient coupling with optical fibers, collimation processing is required. A common technical measure is to set a collimating lens, such as a cylindrical lens, in front of the light-emitting area of ​​the semiconductor laser, and the collimated light beam is then coupled to the optical fiber. The technical measures described are relatively mature in solving the collimation problem of the single-tube semiconduc...

AI Technical Summary

Problems solved by technology

It is impossible to use the existing micro-collimator lens array to collimate the output beam of the stacked pulsed semiconductor laser 2, or it is difficult to take into account the discreteness of the stacked pulsed semiconductor laser 2, which eventually leads to low coupling efficiency. It is necessary to learn from the single-tube semiconductor laser Using a single collimating cylindrical lens 5 to collimate the beam to solve the problem of beam collimation of the stacked pulsed semiconductor laser 2

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