13 June 2017 Double-wavelength optical fiber laser and its application for large step height measurement
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Proceedings Volume 10449, Fifth International Conference on Optical and Photonics Engineering; 104492P (2017) https://doi.org/10.1117/12.2270889
Event: Fifth International Conference on Optical and Photonics Engineering, 2017, Singapore, Singapore
Abstract
Two kinds of tunable double-wavelength erbium-doped fiber (EDF) ring lasers were developed and their application to step height measurement using two-wavelength self-mixing interferometry (SMI) was demonstrated. The fiber lasers can emit two different wavelengths without any laser mode competition. Each wavelength has its own gain medium which is a length of erbium-doped fiber. Fiber Bragg gratings are used to determine the value of the emitted wavelengths. Large step heights can be measured using multiple self-mixing interference of the two wavelengths. The maximum height that can be measured is half synthetic wavelength of the two wavelengths. A step height of 2mm constructed with two gauge blocks has been measured. The standard deviation of measurement results is 2.5nm.
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Lianlian Dong, Lianlian Dong, Fang Xie, Fang Xie, Sen Ma, Sen Ma, Yunzhi Wang, Yunzhi Wang, Liang Chen, Liang Chen, } "Double-wavelength optical fiber laser and its application for large step height measurement", Proc. SPIE 10449, Fifth International Conference on Optical and Photonics Engineering, 104492P (13 June 2017); doi: 10.1117/12.2270889; https://doi.org/10.1117/12.2270889
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