Research on real-time online ranging system for wide-spectrum femtosecond laser interference based on frequency-domain peak detection method

Zhiyong Zhang; Li Chen; Yue Zhao; Ying Qin; Xiang Zhang; Yang Cao; Guangwei Chen; Guoqing Hu; Zhehai Zhou

doi:10.1117/12.3035372

20 November 2024 Research on real-time online ranging system for wide-spectrum femtosecond laser interference based on frequency-domain peak detection method

Zhiyong Zhang, Li Chen, Yue Zhao, Ying Qin, Xiang Zhang, Yang Cao, Guangwei Chen, Guoqing Hu, Zhehai Zhou

Author Affiliations +

Proceedings Volume 13241, Optical Metrology and Inspection for Industrial Applications XI; 1324118 (2024) https://doi.org/10.1117/12.3035372
Event: SPIE/COS Photonics Asia, 2024, Nantong, Jiangsu, China

Abstract

A real-time online ranging system is proposed using the frequency domain peak interval measurement method. By utilizing an NPR-locked, all-fiber, wide-spectrum erbium-doped femtosecond laser, a gain distribution with a center wavelength of 1560nm is obtained, with a repetition frequency of up to 14.54MHz, and then a femtosecond laser source with a spectral width of 38nm at -3dB can be obtained by adjusting its polarization state, which can improve ranging accuracy. By a combination of an upper computer system an all-fiber Michelson interferometer, real-time capture and processing of spectral interference data can be achieved, thereby realizing real-time acquisition of relative displacement distance. Experimental results show that within the coherence length, the measurable relative distance is around 2cm, and the measurement accuracy can reach 5μm.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Zhiyong Zhang, Li Chen, Yue Zhao, Ying Qin, Xiang Zhang, Yang Cao, Guangwei Chen, Guoqing Hu, and Zhehai Zhou "Research on real-time online ranging system for wide-spectrum femtosecond laser interference based on frequency-domain peak detection method", Proc. SPIE 13241, Optical Metrology and Inspection for Industrial Applications XI, 1324118 (20 November 2024); https://doi.org/10.1117/12.3035372

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