Recent advances in absolute distance measurements using femtosecond light pulses

Seung-Woo Kim; Young-Jin Kim; Sangwon Hyun; Byung Jae Chun; Yoon-Soo Jang

doi:10.1117/12.2182139

6 March 2015 Recent advances in absolute distance measurements using femtosecond light pulses

Seung-Woo Kim, Young-Jin Kim, Sangwon Hyun, Byung Jae Chun, Yoon-Soo Jang

Proceedings Volume 9446, Ninth International Symposium on Precision Engineering Measurement and Instrumentation; 94464M (2015) https://doi.org/10.1117/12.2182139
Event: International Symposium on Precision Engineering Measurement and Instrumentation, 2014, Changsha/Zhangjiajie, China

Abstract

Absolute distance measurement (ADM) with high precision is required for various fields of precision engineering, which has long been implemented by means of time-of-flight measurement of a pulsed laser, intensity or frequency modulation of a continuous-wave laser, and cross-correlation of pseudo-random micro-wave signals. Recently, in response to increasing demands on the measurement precision and range beyond conventional limits, femtosecond pulse lasers began to draw attention as a new light source that permits realizing various advanced ADM principles such as synthetic radiofrequency wavelength generation, Fourier-transform-based dispersive analysis and multi-wavelength interferometry. In this talk, we present the state-of-the-art measurement principles and performance demonstrated by exploiting the unique temporal and spectral characteristics of femtosecond laser pulses for high-precision ADM applications.

Citation Download Citation

Seung-Woo Kim, Young-Jin Kim, Sangwon Hyun, Byung Jae Chun, and Yoon-Soo Jang "Recent advances in absolute distance measurements using femtosecond light pulses", Proc. SPIE 9446, Ninth International Symposium on Precision Engineering Measurement and Instrumentation, 94464M (6 March 2015); https://doi.org/10.1117/12.2182139

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