Method for generating white laser based on time low-coherence optical parametric amplification

Abstract

The invention relates to a method for generating white laser based on time low-coherence optical parametric amplification, which comprises the following steps of: placing a nonlinear crystal on a six-dimensional rotating translation platform, collimating pumping light and seed light, respectively entering the nonlinear crystal in a collinear manner to generate an optical parametric amplification effect, adjusting the deflection angle of the crystal by using the six-dimensional rotating translation platform, achieving a more accurate phase matching condition on the basis of a crystal cutting angle, outputting generated signal light and idler frequency light in a collinear mode, covering the spectrum with different wave bands, performing time synchronization and beam combination on the signal light and the idler frequency light output by the lasers, and obtaining needed white laser output. The optical parametric amplification technology of the second-order nonlinear effect and the super-radiation low-time coherent light are utilized, and the requirements for pumping light peak power and thermal management of the pumping light source are lowered; high-efficiency conversion can be realized, and broadband white laser output with a broad spectrum expected to cover a visible light wave band of 500-900nm is provided.

Description

technical field [0001] The invention relates to the field of optics, in particular to a method for generating white light laser light based on time-low coherent light parametric amplification. Background technique [0002] White light lasers are widely used in display imaging (such as laser TV), laser printing, laser lighting and other fields. At present, the methods for producing white light laser at home and abroad are mainly multi-color laser synthesis, near-ultraviolet laser excitation of three primary colors (red, green, blue) phosphor synthesis and blue laser excitation of yellow phosphor synthesis as representative methods, which have low luminous intensity, Defects such as poor beam quality cannot meet the actual needs of high power and directional output. [0003] In this regard, people have conducted a lot of research and exploration on the generation method of high-power white light laser, and proposed a supercontinuum method based on third-order nonlinear effect...

AI Technical Summary

Problems solved by technology

At present, the methods for producing white light laser at home and abroad are mainly multi-color laser synthesis, near-ultraviolet laser excitation of three primary colors (red, green, blue) phosphor synthesis and blue laser excitation of yellow phosphor synthesis as representative methods, which have low luminous intensity, Defects such as poor beam quality cannot meet the actual needs of high power and directional output

[0003] In this regard, people have conducted a lot of research and exploration on the generation method of high-power white light laser, and proposed a supercontinuum method based on third-order nonlinear effects such as self-phase modulation, cross-phase modulation and four-wave mixing in photonic fibers. However, the problems of this method are that the peak power of the pumped light is high, the coupling efficiency is low when it enters the fiber, and the thermal damage caused by quantum loss energy when it is transformed into a supercontinuum laser.

At present, white light lasers are difficult to meet the actual needs in terms of output power and system stability

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