Infrared and Laser Engineering, Volume. 45, Issue 2, 222004(2016)
Strain sensor based on ring cavity fiber laser
An up-tapered fiber strain sensor based on Mach-Zehnder interferometer(MZI) was proposed and demonstrated. With the MZI as a filter, the laser was finally generated in the optical fiber ring resonator through comb filtering at the gain spectrum of erbium-doped fiber. The MZI could work as filter as well as carry on the sensor of optical fiber axial strain, and thus realize the output wavelength of the laser blue-shifts with the increase of strain. The experiment result shows that the sensor around the wavelength of 1 557 nm exhibits the axial strain sensitivity of 3 pm/με by monitoring the wavelength shift. Moreover, the up-tapered MZI fabrication process is very simple, cost effective and high mechanical strength.
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Yu Shaowei, Pei Li, Wen Xiaodong, Liu Chao, Li Chao. Strain sensor based on ring cavity fiber laser[J]. Infrared and Laser Engineering, 2016, 45(2): 222004
Category: 光通信与光传感
Received: Jun. 11, 2015
Accepted: Jul. 14, 2015
Published Online: Apr. 5, 2016
The Author Email: Shaowei Yu (10111012@bjtu.edu.cn)