Micro solid-state laser module

Abstract

The invention discloses a micro solid-state laser module, which comprises the following main elements: a solid laser, a wavelength converter, a light splitting device and an optical detector, whereinthe solid laser is used for emitting the laser; the wavelength converter is used for converting the wavelength of the laser into lasers with different wavelengths, such as green light, according to afrequency doubling principle; the light splitting device, such as a prism, is arranged behind the wavelength converter and is used for splitting the lasers after the conversion into two light beams, namely the first light beam is that a main light beam contains most of the power and can vertically outward emit to become a main output light source, and the second light beam passes through the lightsplitting device, such as the prism, and enters the optical detector; the optical detector is used for detecting the optical power of the second light beam; the light splitting device is utilized toensure that all the elements can be packaged on one plane for treatment so as to be favourable for being packaged in a smaller TO-can package; and the compensating correction can also be performed bydirectly sensing the laser obtained after the conversion of the wavelength converter through the optical detector to ensure that the error of feedback compensation is minimum and is far superior to the conventional feedback mode.

Description

technical field [0001] The invention relates to a solid-state laser module, in particular to a miniature solid-state laser module. Background technique [0002] A solid state laser module is a common photoelectric device (Photo-electronic / Photonic Device), which uses a wavelength converter (wavelength conversion device, or wavelength conversion crystal) to convert a known wavelength to The laser light is converted into different wavelengths (λ 2 ) lasers, such as blue light, green light, etc., can be used according to different needs; therefore, photoelectric devices or laser modules are generally called wavelength conversion photonic devices (Wavelength Conversion Photonic Device). [0003] An optoelectronic device, such as the solid-state laser module referred to in this case, can choose to use wavelength converters with different structural designs, and basically each wavelength converter laser (wavelength λ 1 ) and converted laser (wavelength λ 2 ) between wavelength ...

AI Technical Summary

Problems solved by technology

[0006] Currently, wavelength converters commonly used in solid-state laser modules can be periodically poled lithium niobate crystals (Periodically Poled Lithium Niobate, PPLN for short), potassium vanadate crystals (KTiOPO 4 , referred to as KTP), LBO, BBO, ADP and other crystals, among them, PPLN has a higher wavelength conversion efficiency (up to about 50%); relatively, the conversion efficiency of KTP is much lower (about 5% to 10% %), but because the conversion efficiency of KTP is less sensitive to external temperature changes, and the component price is much lower than that of PPLN, so if KTP is used as the wavelength converter of the solid-state laser module, it will be very important for the low-priced market that does not require high performance. Competitiveness; KTP is a stacked (Bulk) type, its optical coupling aperture is larger, and it is easy to couple lasers; therefore, the present invention proposes a simplified micro-solid-state laser module architecture such as a micro-solid-state green laser module. And its package still adopts TO-can packaging (TO-can packaging) mode. Compared with traditional solid-state (green light) laser modules, it is expected to have overwhelming competitiveness in terms of module volume, performance, production capacity and price.

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