F-P cavity and laser using said F-P cavity

US8284813B2 · kind B2 · utility

Assignee

• NATIONAL INSTITUTE OF METROLOGY, CHINA · CN

Inventors

• Erjun Zang · Beijing, CN
• Yang Zhao · North Andover, US
• Jianping Cao · Suzhou, CN
• Ye Li · Beijing, CN
• Zhanjun Fang · Beijing, CN

Key dates

• Filing date: Jul 7, 2011
• Grant date: Oct 9, 2012
• Expiry date: Jul 7, 2031

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S5/142
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The disclosure discloses a Fabry-Perot (F-P) cavity, which is a folded confocal cavity integrally formed by a monolithic optical element, the folded confocal cavity having three reflection surfaces, wherein a first reflection surface is a plane and at the same time serves as an input/output coupling surface, a second reflection surface is a plane, and a third surface is a spherical surface, curvature radius of which is equal to half of a round trip geometric length of light in the folded confocal cavity. The invention further discloses a laser based on the F-P cavity. The solution of the disclosure solves the problems in existing folded F-P cavity, such as unsatisfactory stability, sensitive to outside inferences, bulky and complicated construction.