Infrared non-linear optical crystal, preparation process and application thereof

US11187964B2 · kind B2 · utility

Assignee

• FUJIAN INSTITUTE OF RESEARCH ON THE STRUCTURE OF MATTER, CHINESE ACADEMY OF SCIENCES · CN

Inventors

• Ling Chen · Claremont, US
• Yanyan Li · Beijing, CN
• Liming Wu · Chengdu, CN

Key dates

• Filing date: May 10, 2018
• Grant date: Nov 30, 2021
• Expiry date: Mar 14, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F1/392
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An infrared non-linear optical crystal has the following molecular formula: A18X21Y6M48, in which A is Ba, Sr or Pb; X is Zn, Cd or Mn; Y is Ga, In or Al; and M is S, Se or Te. The crystal belongs to trigonal system and has space group R3. The crystal Ba18Zn21Ga6S48 is a type I phase matching non-linear optical material, in a particle size range of 150˜210 μm, its powder frequency doubling intensity and the laser damage threshold are respectively 0.5 times and 28 times those of the commercial material AgGaS2. Other crystals have the same or similar structure and properties such as optical property. The infrared non-linear optical crystal of the present application has important prospects in military and civilian applications, and can be used in electro-optical countermeasures, resource detection, space antimissile and communications, etc.