Welding system and online monitoring method for online monitoring of laser crystal transmittance

Abstract

The invention discloses a welding system for on-line monitoring transmittance of a laser crystal, and an on-line monitoring method of the welding system. The welding system comprises a crystal welding chamber and an on-line monitoring system, wherein the crystal welding chamber is used for welding the laser crystal therein; the on-line monitoring system is used for transmitting a detecting laser beam to the laser crystal and to dividing the detecting laser beam into detecting lasers that pass by the laser crystal and reference lasers that do not pass by the laser crystal, and for on-line monitoring the transmittance of the laser crystal according to a ratio of light intensity of the detecting lasers that pass by the laser crystal to light intensity of the reference lasers that do not pass by the laser crystal. The on-line monitoring method disclosed by the invention on-line monitors change of the transmittance of the laser crystal according to the ratio of light intensity of the detecting lasers that pass by the laser crystal to light intensity of the reference lasers that do not pass by the laser crystal. The welding system and the on-line monitoring method disclosed by the invention can realize real-time monitoring of an overall welding progress of the laser, have the characteristics of being available for on-line and real-time monitoring, wide in a scope of application, and the like, provide evidences for improvement of a welding process, and increase a welding yield of the crystal.

Description

technical field [0001] The invention relates to an all-solid-state laser, in particular to a welding system for on-line monitoring of laser crystal transmittance for welding laser crystals and heat sinks in all-solid-state lasers. Background technique [0002] All-solid-state lasers (semiconductor laser-pumped solid-state lasers, referred to as DPL) have the advantages of small size, long life, high efficiency, high beam quality, good stability, high reliability, convenient maintenance, and no pollution due to electric drive. important direction of development. The crystal in the laser is welded with the heat sink to obtain a better cooling effect, so as to achieve high-power laser output. The quality of the welding effect directly affects the output power and beam quality of the laser. Factors such as heating temperature, heating rate, and cooling rate during the welding process may affect the film layer of the crystal. Excessive heating temperature may cause the film lay...

AI Technical Summary

Problems solved by technology

Although these methods directly reflect the influence of welding on the film layer, they cannot analyze which processes in the welding step cause damage to the film layer, and cannot find whether the film layer is damaged during the crystal welding process.

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