High power mini laser package

Abstract

The invention discloses a high power mini laser package which structurally comprises a laser diode (LD) pump light source, a laser module (such as a Green module) formed by a laser crystal and an optical frequency doubling crystal, a reflector, a potential difference (PD) feedback device, an output filtering sheet, a semiconductor cooler (TEC) and a cooling fin. The high power mini laser package is characterized in that a metal tube casing serves as a bearing platform of elements which are fixed on the bearing platform, the elements are packaged in a laser protective tube casing, the LD pump light source with the PD feedback device is arranged on a lateral wall of the metal tube casing in array, the laser module is installed on the metal tube casing to be parallel to a light propagation direction, and the laser module respectively aligns at each luminous point of the LD pump light source. The reflector and the metal tube casing are placed in 45 degrees, the PD feedback device is arranged below the reflector, and the output filtering sheet is vertical to the metal tube casing to be placed at the other end to form a high power laser array structure. Compared with the prior art, the high power mini laser package has the advantages of being low in cost, small in size, simple in structure, convenient to adjust and maintain, good in stability and the like. The high power laser array structure can greatly improve work efficiency, so that the high power mini laser package is suitable to mass automatic production.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a small high-power laser capable of parallel output. Background technique [0002] At present, lasers that generate visible light and ultraviolet light can achieve miniaturization, low loss, and high power. Therefore, it can be widely used in laser display, optical storage, spectral analysis and other fields. In the visible light region, lasers with commercial value have appeared in the range of shorter wavelengths (such as 400nm-445nm), but the technology to obtain high-power lasers with wavelengths greater than 470nm (green light) is still being explored. The existing technology for generating green light is that the pump light (such as a laser with a wavelength of 808nm) passes through a neodymium-doped laser crystal (such as Nd:YAG, Nd:YVO4), a nonlinear crystal (such as KTP, LBO) or a periodic pole. The frequency doubling effect of non-linear crystals (PPMgOLN, PPZnOLT, PPL...

AI Technical Summary

Problems solved by technology

In addition, although multiple LD lasers in the LD laser array are connected in series, in parallel, or combined in series and parallel, or independently, PD feedback is not added to the optical path, so it is impossible to know the pump output of each LD pump light source. Whether the light meets the requirements, which leads to the above connection method making the LD pump light source unable to achieve the best effect

In addition, laser crystals and nonlinear crystals are more sensitive to temperature. Using the same crystal may lead to uneven temperature at each point inside the crystal, which is not conducive to high power output of the laser.

Images