Double-wavelength optical fiber laser and its application for large step height measurement

Lianlian Dong; Fang Xie; Sen Ma; Yunzhi Wang; Liang Chen

doi:10.1117/12.2270889

13 June 2017 Double-wavelength optical fiber laser and its application for large step height measurement

Lianlian Dong, Fang Xie, Sen Ma, Yunzhi Wang, Liang Chen

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.

Citation Download Citation

Lianlian Dong, Fang Xie, Sen Ma, Yunzhi Wang, and 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); https://doi.org/10.1117/12.2270889

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