Method for measuring the strain of material using short cavity fiber laser

US9016105B2 · kind B2 · utility

Assignee

• Beijing information Science & Technology University · CN

Inventors

• Lianqing Zhu · Beijing, CN
• Fei Luo · Somerville, US
• Wei He · Beijing, CN
• Mingli Dong · Beijing, CN
• Yinmin Zhang · Beijing, CN
• Yudong Jia · Beijing, CN

Key dates

• Filing date: Oct 9, 2013
• Grant date: Apr 28, 2015
• Expiry date: Oct 9, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G01L1/246
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for measuring the strain of material using a short cavity fiber laser, includes steps of: a) arranging the short cavity fiber laser, which laser comprises sequentially coupled laser diode pumping source, a wavelength division multiplexer, a fiber bragg grating, an active fiber and a loop mirror; b) fixing the short cavity fiber laser on the material whose strain will be measured, and matching the stretching direction of the fiber of the short cavity fiber laser with the direction of the strain produced by the material to be measured; c) measuring the drift amount of longitudinal mode output by the short cavity fiber laser; and d) calculating and obtaining the strain of the material to be measured.