Laser device capable of freely switching laser between 1064nm wavelength and 355nm wavelength

Abstract

The invention belongs to the technical field of laser and relates to a laser device, in particular to a laser device capable of freely switching laser between 1064nm wavelength and 355nm wavelength. The laser device comprises a pumping source (1), an energy transfer fiber (2), a coupling system (3), a laser gain dielectric crystal (5), a Q switch (6), an activizer (7), a polarizing spectroscope (8), a frequency doubling crystal (11) and a sum frequency crystal (12). The activizer (7) is used for controlling rotation of a laser polarization plane, so that the laser penetrates through the polarizing spectroscope (8) or are reflected to select different channels of laser oscillation, thus realizing different wavelength output; and under the control of the activizer (7), the laser can be freely switched in the different output wavelengths.

Description

【Technical field】 [0001] The invention relates to a 1064nm and 355nm wavelength free switching output laser, which belongs to a kind of laser related to the technical field of laser. 【technical background】 [0002] Since the advent of laser in the 20th century, laser processing technology has been valued by people. After more than 40 years of development, it has become an important part of advanced manufacturing technology. Based on the laser beam has a series of advantages such as good monochromaticity, high energy density, good space control and time control, it has been widely used in materials processing and other fields, and lasers and equipment for material processing can only output a single wavelength. , which limits the scope of its processing materials. For example, 1064nm laser can only process metals and some non-metals, but it cannot effectively process materials such as glass, ceramics, crystals, gemstones, etc. that have poor absorption at 1064nm. For such su...

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Problems solved by technology

Based on the laser beam has a series of advantages such as good monochromaticity, high energy density, good space control and time control, it has been widely used in materials processing and other fields. Lasers and equipment for material processing can only output a single wavelength , which limits the scope of its processing materials. For example, 1064nm laser can only process metals and some non-metals, but it cannot effectively process materials such as glass, ceramics, crystals, gemstones, etc. that have poor absorption at 1064nm. For such substances, it is the best choice to use 355nm ultraviolet laser for processing, but 355nm usually has a small output power, and its processing speed for conventional substances such as metals and plastics is limited. At present, most laser light sources either output a single wavelength, For example, the patent "Design method of semiconductor diode double-terminal pumped high-power ultraviolet laser (CN101232148A)" is only a single wavelength output of 355nm, and the patent "semiconductor double-terminal pumped third harmonic ultraviolet laser (CN101179176A)" is only a single 355nm wavelength output

Either dual-wavelength output at the same time, such as the patented "Visible Band Dual-Wavelength Solid-state Laser (02124628.9)" and the patented "Red-Green Dual-Wavelength Laser (02117364.9)" are dual-wavelength simultaneous output, and it is impossible to select one of the wavelengths for output

Even if there are lasers with selective wavelength output at present, other components need to be added to the optical path, such as external frequency doubling crystals, ultraviolet triple frequency crystals, etc., which makes the application of lasers more cumbersome and is not conducive to industrial field applications.

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