White light source based on laser

Abstract

The invention discloses a white light source based on laser. The white light source based on the laser comprises a laser device and an optical fiber used for transmitting the laser. One end of the optical fiber is connected with a light-out port of the laser device in a coupling mode. A luminous portion is formed on the optical fiber after the luminous portion receives light leak processing. A fluorescent powder layer is arranged on the outer surface of the luminous portion and is capable of modulating the colored laser to a white light ray and emitting the white light ray. The white light source can emit the white light which is even in color temperature, and the displaying index of the white light is equal to or bigger than 70. The laser has good directionality and can be conveniently led into the optical fiber to achieve long distance transmission. Therefore, the white light source based on the laser is suitable for being applied to the medical lighting field and the vehicle-mounted lighting field for factories and mines and other light fields. Meanwhile, through the optical fiber transmission technology, the laser device can be separated from fluorescent powder, so the problem of decreasing of luminous efficiency due to the fact that fluorescent powder is heated is effectively solved.

Description

technical field [0001] The invention belongs to the technical field of optical instrument manufacture, and in particular relates to a white light source. Background technique [0002] In recent years, with the increasing demand for energy and the shortage of global resources, energy-saving technology has received unprecedented attention. As a light source, visible-band laser has its own characteristics, especially the development of semiconductor laser technology. A big step forward as a lighting tool. At present, the efficiency of semiconductor lasers with a wavelength of 980nm is ≥76%. Based on the same theoretical calculation, the efficiency of semiconductor lasers in the visible band will be ≥70%. Such high energy conversion efficiency of semiconductor lasers is more energy-efficient than traditional incandescent lamps and fluorescent lamps. [0003] Now solid-state lighting is more mature than LED lighting. LED has attracted much attention due to its high electro-optic...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a laser-based white light source. The white light source uses a blue laser as an excitation light source and uses an optical fiber as a transmission medium to realize a light source that can transmit light remotely and emit uniform white light. The light source Uniform color temperature and color rendering index ≥ 70, which solves the problem of low light output efficiency and inability to transmit light remotely in the prior art based on LED light sources

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