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Infrared nonlinear optical crystal, its preparation method and application

A nonlinear optics, crystal technology, applied in nonlinear optics, chemical instruments and methods, optics, etc., can solve the problems of low laser damage threshold, two-photon absorption, nonlinear optical coefficient, high, medium and far infrared transmittance, etc. Excellent second-order nonlinear optical properties, strong frequency doubling response, the effect of realizing large frequency doubling coefficient and high laser damage threshold

Active Publication Date: 2020-06-09
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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Problems solved by technology

[0003]The nonlinear optical crystal materials in the infrared band are mainly ABC2 type chalcopyrite structure semiconductor materials, typical examples such as AgGaS2, AgGaSe2, ZnGeP2, etc. These compounds have large nonlinear optical coefficients and high mid-to-far infrared transmittance, but also There are serious disadvantages such as low laser damage threshold and two-photon absorption, which limit their applications

Method used

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  • Infrared nonlinear optical crystal, its preparation method and application
  • Infrared nonlinear optical crystal, its preparation method and application
  • Infrared nonlinear optical crystal, its preparation method and application

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Embodiment 1

[0042] The molar ratio of strontium sulfide, zinc sulfide and gallium sulfide is SrS:ZnS:Ga 2 S 3 =5:1:3 Fully grind and mix evenly and press into tablets, and place the pressed raw materials in a graphite crucible. Place the graphite crucible with raw materials in the quartz reaction tube, and vacuum to 10 -3 Pa, and use a hydrogen-oxygen flame to melt and seal the quartz reaction tube. Put the sealed quartz reaction tube into a tube furnace with a temperature controller, heat it to 950°C, keep it warm for 120 hours, then cool it down to 300°C at a rate of no more than 5°C / hour, stop heating, and naturally After cooling to room temperature, the pure phase of microcrystalline powder of nonlinear optical crystal material is obtained.

[0043] Put the quartz tube containing the pure phase of the above-mentioned microcrystalline powder into a tube furnace with a temperature controller to raise the temperature to 1000°C, keep it for at least 100 hours, and then cool it down to ...

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Abstract

The invention belongs to the technical field of inorganic nonlinear optical materials, and particularly discloses an infrared nonlinear optical crystal and a preparation method and application thereof. The infrared nonlinear optical crystal adopts a molecular formula shown as follows: Sr5ZnGa6S15, wherein the crystal structure belongs to an orthorhombic system and the space group is Ama2. The infrared nonlinear optical crystal has excellent second-order nonlinear optical properties, proper birefringence, a relatively wide light transmission range and strong infrared frequency doubling response; the powder frequency doubling intensity of the infrared nonlinear optical crystal can reach 1.2 times that of a commercial material AgGaS2, and a laser damage threshold thereof is 16 times that of the AgGaS2 crystal; the infrared nonlinear optical crystal has an important application value in the high-tech field of laser frequency conversion, near-infrared probes, photorefractive information processing and the like, and is especially applicable to infrared detectors and infrared lasers.

Description

technical field [0001] The invention belongs to the technical field of inorganic nonlinear optical materials, and specifically relates to an infrared nonlinear optical crystal, its preparation method and application. Background technique [0002] Nonlinear optical crystals are a very important class of functional materials, which are widely used in laser communication, optical information processing, integrated circuits and military technology. Generally speaking, an ideal nonlinear optical crystal must meet the following conditions: (1) large nonlinear optical coefficient; (2) high laser damage threshold; (3) appropriate birefringence; (4) wide Optical transmission range; (5) Good physical and chemical properties and mechanical properties, etc. Nonlinear optical materials can be divided into inorganic materials, organic materials, polymer materials and organometallic complex materials according to their physical and chemical properties. Most of the nonlinear optical cryst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/355C30B29/10C30B1/10
CPCC30B1/10C30B29/10G02F1/3551
Inventor 林华吴新涛朱起龙
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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