Triple-frequency ultraviolet laser

Abstract

The invention discloses a triple-frequency ultraviolet laser. The triple-frequency ultraviolet laser comprises a seed source, a laser amplifier and a triple-frequency module connected in an optical manner, the seed source is a gain switch picosecond seed source, the laser amplifier is an optically-connected multistage amplifier, the triple-frequency module comprises a focusing lens, a double-frequency crystal and a heating furnace thereof, a triple-frequency crystal and a heating furnace thereof, an ultraviolet light splitter, and a collimator in sequence on an optical path, the focusing lens, the double-frequency crystal and the heating furnace thereof, and the triple-frequency crystal and the heating furnace thereof are arranged in a coaxial manner, the double-frequency crystal is a LBO crystal with one-class phase match, and the triple-frequency crystal is a LBO crystal with two-class phase match. According to the triple-frequency ultraviolet laser, the repetition frequency of the generated seed light is adjustable, the pulse width is adjustable, the light is the picosecond-level single-mode linearly polarized light, the characteristics of ultraviolet laser and the seed light are consistent after amplification and triple frequency, the power can reach 35 W, and the efficiency reaches up to 50%.

Description

technical field [0001] The invention belongs to the field of lasers, in particular to a triple frequency ultraviolet laser. Background technique [0002] Ultraviolet (UV) lasers are widely used in the field of industrial micromachining, such as marking, drilling, scribing, welding, cutting of industrial parts, micromachining of medical devices, packaging of electronic components, three-dimensional molding of micro components, etc. In addition, in microelectronics, spectral analysis, optical data storage, optical disc control, atmospheric detection, photochemistry, photobiology, space optical communication, laser-induced material atomic fluorescence and UV absorption (such as fluorescence induction of Si atoms, freezing and control ) and the medical field also have broad application prospects. [0003] Especially in the field of industrial processing, due to the short wavelength and high photon energy of UV laser, its focused spot can be smaller, and high-energy UV photons c...

AI Technical Summary

Problems solved by technology

In addition, semiconductor-pumped solid-state lasers have low optical-to-optical conversion efficiency. To obtain high-power ultraviolet light output, multiple semiconductor lasers must be used to form an array, which increases the complexity and energy consumption of the system.

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