White laser

Abstract

The invention relates to a white laser. The laser comprises a pumping source, a first resonant cavity and a second resonant cavity; the pump source is a blue light semiconductor laser; a pumping lightof the pumping source transmitted by a beam splitter sequentially passes through a first adjustable attenuator, a first total reflection mirror and a first lens and is incident on the first resonantcavity, and a first laser crystal is pumped to generate a red light; a pumping light of the pumping source reflected by the beam splitter sequentially passes through a second adjustable attenuator, asecond total reflection mirror and a second lens and is incident on the second resonant cavity, and a second laser crystal is pumped to generate a green light; the red light, the green light, a blue light which is incident on the first resonant cavity from the pumping source and not subjected to start-oscillation and a blue light which is incident on the second resonant cavity from the pumping source and not subjected to start-oscillation are outputted out of the cavities through a dichroic mirror and a laser output laser to be mixed to form a white light. According to the white laser, power of the pumping lights incident on the two resonant cavities is adjusted through the two adjustable attenuators respectively, so that power ratio of the red light to the green light is controlled to achieve adjusting of the outputted white light spectrum.

Description

technical field [0001] The invention relates to the fields of laser illumination and laser display, in particular to a white light laser. Background technique [0002] With the advancement of science and technology and the rapid development of laser technology, lasers have been widely used in communication, medical treatment, machining, weapons, lighting and other fields. Limited by the high monochromaticity of lasers, lasers mainly output monochromatic light. Of course, researchers have also made a lot of efforts and attempts in the field of white light laser research, and achieved good results. [0003] At present, the methods of using laser technology to generate white light mainly include: (1) using multiple discrete lasers to synthesize white light, this method requires multiple devices, and the whole system is inconvenient to move and difficult to operate; (2) using high optical power The nonlinear response of the material produces lasers of different colors, which a...

AI Technical Summary

Problems solved by technology

[0003] At present, the main methods of using laser technology to generate white light are: (1) using multiple discrete lasers to synthesize white light, which requires multiple devices, and the entire system is inconvenient to move and difficult to operate; (2) using high optical power The nonlinear response of the material produces lasers of different colors, which are then mixed and regulated. This method requires a pump laser system with high power, and the operation has certain risks. Non-linear effects such as breakdown effect reduce the quality of the output beam; (3) use titanium-doped sapphire lasers to pump photonic crystals and microstructured fibers. This method is a more practical technology, but photonic crystals and microstructured fibers The structure is complex, and the titanium-doped sapphire laser is expensive, which makes the system expensive and difficult to control; (4) There are also semiconductor materials with special structures, such as lattice-mismatched semiconductor crystals. These methods require high technical requirements and crystals are not easy to control get expensive

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