An Optical Parametric Oscillating Laser Based on Gallium Lanthanum Silicate Crystal

An optical parametric oscillation and lanthanum silicate technology, which is applied in the field of laser technology, can solve the problems of LGS optical parametric oscillation laser devices, etc., and achieves a continuously adjustable transmission range, a simple and compact structure, and a small expansion coefficient. Effect

Active Publication Date: 2017-08-08
SHANDONG UNIV
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  • Summary
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  • Description
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  • Application Information

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Problems solved by technology

This type of crystal is mainly used in the fields of laser, electro-optic and piezoelectric. Due to the limitations of people's research on LGS crystals, so far there has been no application of LGS as a nonlinear crystal in the OPO field of nonlinear optics and optical parametric oscillator laser devices. report

Method used

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  • An Optical Parametric Oscillating Laser Based on Gallium Lanthanum Silicate Crystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Optical parametric oscillator laser structure such as figure 1 As shown, it consists of excitation source 1, input mirror 2, LGS crystal 3 and output mirror 4 arranged sequentially along the optical path, wherein: excitation source 1 is Nd:YAG (neodymium-doped yttrium aluminum garnet, Nd 3+The doping concentration is 1 at.%) Q-switched laser; the input mirror 2 is a plane mirror, and its two transparent surfaces are coated with a dielectric film with high transmission to 1.06 μm and high reflection to 1.57 μm and 3.26 μm; LGS crystal 3 The direction of light transmission is 79.6° to the optical axis, and the crystal length in the direction of light transmission is 30mm. Each light-transmitting surface is coated with a dielectric film with a high reflection of 1.57 μm and a partial transmission of 3.26 μm (transmittance 80%). The distance between the input mirror and the output mirror is 50mm.

[0038] Turn on the excitation source and increase the pump power to exceed...

Embodiment 2

[0040] As described in Embodiment 1, the difference is that the length of the crystal in the direction of light transmission is 0.5 mm, and the distance between the input mirror and the output mirror is 20 mm.

[0041] Turn on the excitation source and increase the pump power to exceed its threshold to obtain a 3.26 μm mid-infrared OPO laser output.

Embodiment 3

[0043] As described in Embodiment 1, the difference is that the length of the crystal in the direction of light transmission is 50 mm, and the distance between the input mirror and the output mirror is 100 mm.

[0044] Turn on the excitation source and increase the pump power to exceed its threshold to obtain a 3.26 μm mid-infrared OPO laser output.

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Abstract

The invention discloses an optical parametric oscillation laser device based on a lanthanum gallium silicate (LGS) crystal. The optical parametric oscillation laser device sequentially comprises an exciting source, an input mirror, the LGS crystal and an output mirror, wherein the LGS crystal is cut in the phase matching direction of optical parametric oscillation, and the light-pervious surface of the LGS crystal is coated with a dielectric film highly pervious to exciting light, signal frequency light and idler frequency light; the exciting source is an all-solid-state pulse laser device; the two light-pervious surfaces of the input mirror are coated with a dielectric film highly pervious to the exciting light and highly reflective to the signal frequency light and the idler frequency light; the output mirror is coated with a dielectric film highly reflective to the signal frequency light and partially pervious to the idler frequency light. According to the optical parametric oscillation laser device, the LGS crystal is used as a nonlinear medium for outputting optical parametric oscillation laser of 1.51-3.59 microns, the output energy is high, the structure is simple, and the transmission range is continuous and adjustable.

Description

technical field [0001] The present invention relates to a kind of based on gallium lanthanum silicate (La 3 Ga 5 SiO 14 , hereinafter referred to as an optical parametric oscillator laser of LGS) crystal, belongs to the field of laser technology, and relates to a nonlinear crystal device. Background technique [0002] The optical parametric oscillator (OPO) oscillation process is an important technology for generating mid-to-far infrared lasers, because its output wavelength can be continuously tuned within a few hundred nanometers covering the near-infrared to mid-to-far infrared, and has been widely used in many fields. application. The OPO process is the nonlinear optical response of matter to high-energy lasers, so crystals with large nonlinear coefficients, moderate birefringence, and high optical damage threshold are the first choice. At present, the commonly used crystals of OPO are rubidium titanyl phosphate (KTA for short) and lithium niobate (LN for short) crys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/108H01S3/081
Inventor 于浩海路大治王继扬张怀金
Owner SHANDONG UNIV
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