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Deliquescence-resistant ultraviolet frequency tripling crystal and preparation method and application thereof

A triple frequency, crystal technology, used in laser parts, optics, instruments, etc., can solve problems that have not yet been seen, and achieve the effect of easy processing and storage, simple implementation, and good mechanical properties.

Inactive Publication Date: 2012-07-04
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Article (Optics Communications 209(2002) 481-484, Efficient second harmonic generation in a neww nonlinear La 2 CaB 10 o 19 crystal) Explore La 2 CaB 10 o 19 It is used as the application of nonlinear optical materials in the blue-green light band, but there is no relevant use of La 2 CaB 10 o 19 Reports on Crystal Fabrication and Application of Triple Frequency Devices in the Ultraviolet Band

Method used

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  • Deliquescence-resistant ultraviolet frequency tripling crystal and preparation method and application thereof
  • Deliquescence-resistant ultraviolet frequency tripling crystal and preparation method and application thereof
  • Deliquescence-resistant ultraviolet frequency tripling crystal and preparation method and application thereof

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Experimental program
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Embodiment 1

[0030] Use La 2 CaB 10 o 19 Crystal, using the Sellmeire equation, through computer programming, calculated La 2 CaB 10 o 19 The type II triple frequency phase matching curve of the crystal, combined with the frequency multiplication coefficient to determine the phase matching point with high conversion efficiency (θ=67°, ), and then press this phase matching direction to La 2 CaB 10 o 19 The crystal is cut, and its two-way smooth surface is polished, and then coated with a dielectric film to make a La 2 CaB 10 o 19 Crystal II frequency tripler device.

[0031] Attached figure 1 As shown, the La 2 CaB 10 o 19 The crystal type II frequency tripler device is placed at the position labeled "3". At room temperature, the Q-switched Nd:YAG laser 1 is used as the light source, and the type II LBO is used as the frequency doubler device 2; the laser is incident on the 1.06 μm band Infrared laser, the frequency-doubled light and fundamental wave light generated by the f...

Embodiment 2

[0033] Embodiment 2: the appearance of the laser light source 1, the frequency doubling device 2, and the triple frequency crystal is the same as in Embodiment 1, the difference is that the determined phase matching point is θ=67°, The thickness of the triple frequency device in the direction of light transmission is 8mm, and the obtained output power is 8W.

Embodiment 3

[0035] Laser light source 1, frequency doubling device 2, and frequency tripler crystal appearance are all the same as in embodiment 1, the difference is that when the frequency tripler crystal is cut, it is cut in the I-type direction, and the determined phase matching point is θ=49.4° ,three The light transmission direction of the frequency doubling device is 10mm, and the output power obtained is 16W.

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Abstract

The invention discloses a La2CaB10O19 frequency tripling optical crystal device, which is a type I or type II frequency tripling device manufacturing by cutting along a type I or II frequency tripling phase matching direction of a crystal, polishing two light-transmission surfaces and coating a medium film. A manufacturing method of the device comprises the following steps of: measuring a frequency doubling coefficient of the crystal during 1064 waveband standard type I phase matching to obtain four non-zero frequency doubling coefficients; measuring the main refracting power of the crystal under 13 wavelengths ranging from 363 nanometers to 2,325 nanometers by using a minimum deviation angle, and fitting to obtain a Sellmeire equation; calculating by using computer programming according to the Sellmeire equation to obtain type I and type II frequency tripling phase matching curves of the crystal, and determining the phase matching point of the crystal in combination with the frequency doubling coefficient; and cutting the crystal along the phase matching direction, polishing two light-transmission surfaces and coating a medium film to obtain the crystal frequency tripling device, wherein the crystal frequency tripling device is used for generating frequency tripling laser output. The frequency tripling device has the advantages of high mechanical performance, deliquescence resistance, and the like.

Description

technical field [0001] The invention belongs to the application of crystal materials in the technical field of optoelectronics, and in particular relates to a deliquescent ultraviolet triple frequency crystal, a preparation method and application thereof. Background technique [0002] The laser radiation of about 1.06μm output by Nd (neodymium) base laser can be efficiently converted into the second, third and higher harmonics. It has become a valuable source of visible light and ultraviolet radiation. Waves are widely used in laser Raman spectroscopy, photochemistry, atmospheric research, high-speed ultraviolet holography, and pumping short-wavelength dye lasers. Under small and medium fundamental wave power densities, the best way to obtain the third harmonic is to adopt a non-detuning I-type frequency doubling and II-type frequency doubling scheme, so that the fundamental wave light and the frequency-doubling light radiated from the frequency doubling crystal are in the ...

Claims

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Application Information

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IPC IPC(8): H01S3/109G02F1/361
Inventor 吴以成张建秀王丽荣吴洋王桂玲傅佩珍
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI