Strain sensor based on ring cavity fiber laser

Yu Shaowei; Pei Li; Wen Xiaodong; Liu Chao; Li Chao

doi:10.3788/IRLA201645.0222004

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 1557 nm exhibits the axial strain sensitivity of 3 pm/ by monitoring the wavelength shift. Moreover, the up-tapered MZI fabrication process is very simple, cost effective and high mechanical strength.

Strain sensor based on ring cavity fiber laser

1. Institute of Lightwave Technology,Beijing Jiaotong University,Beijing 100044,China

Received Date: 2015-06-11

Rev Recd Date: 2015-07-14

Publish Date: 2016-02-25

Key words:

Abstract: 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 1557 nm exhibits the axial strain sensitivity of 3 pm/ 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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Reference (15)

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Strain sensor based on ring cavity fiber laser

doi: 10.3788/IRLA201645.0222004

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