Device for producing visible to infrared band ultra-wideband ultra continuous laser

Abstract

The invention provides a device for generating visible to infrared band ultra-wideband ultra continuous laser. The device includes a pump light source and a non-linear laser crystal. The device is characterized in that the pump light source is an intermediate infrared femtosecond pulse laser source and the frequency of femtosecond pulse laser provided by the pump light source covers an intermediate infrared section. Besides, the femtosecond pulse laser has a characteristic of high peak value power. The non-linear laser crystal is made of ferroelectric crystal material. The non-linear laser crystal includes a series of cells. The length of the series of cells in light propagation direction varies along the light propagation direcrion according to a continuous chirp change rule. The device can produce visible laser to ultra-continuous and complete relevant laser of an infrared 400 to 2200nm waveband. The device has advantages of controllable structure, convenient preparation and flexible design. The device is high in energy conversion efficiency, small in size and produces ultra-wideband and ultra continuous laser.

Description

Technical field [0001] The present invention relates to the field of laser technology. Specifically, the present invention relates to a device for generating ultra-wideband, super-continuum laser light in the visible to infrared band, and a corresponding non-linear laser crystal manufacturing method. Background technique [0002] Since the production of lasers, lasers have been widely used and valuable in various fields such as industry, medical treatment, communications, and national defense, such as laser processing, detection, remote sensing, imaging, eye surgery, infrared night vision imaging, laser weapons, and controlled nuclear Fusion etc. In the past few decades, laser technology has achieved tremendous development. However, the frequency of the laser output is limited by the energy level of the gain medium, and it cannot produce an output of any frequency. In order to obtain the required frequency of laser, people often need to use nonlinear frequency conversion techno...

AI Technical Summary

Problems solved by technology

At present, the method of producing supercontinuum laser light source in the world is mainly to use photonic crystal fiber to interact with high-power ultrashort pulse laser, and to broaden the frequency range of pump laser through various third-order nonlinear optical effects. The conversion efficiency is not high, and its spectral broadening range is only in the visible spectrum band or in the infrared spectral band, and there is still a determination that the broadening is not large enough

In addition, the supercontinuum laser source in this scheme is not a completely coherent laser source, that is, the radiated light is coherent laser in a specific narrow band, but there is no good coherence between the radiated light of different colors, which limits The scope of application of the light source

For example, it is impossible to use the supercontinuum laser source to generate ultrashort pulse laser

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