Development of a Non-Contact Precision Measurement Technique Using Optical Frequency Combs

Taro Onoe; Satoru Takahashi; Kiyoshi Takamasu; Hirokazu Matsumoto

doi:10.4028/www.scientific.net/KEM.523-524.877

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 523-524Development of a Non-Contact Precision Measurement...

Development of a Non-Contact Precision Measurement Technique Using Optical Frequency Combs

Abstract:

We develop a new method for high-resolution and contactless distance measurement based on self frequency beats of optical frequency combs. We use two optical frequency comb lasers with Rb-stabilized repetition frequencies for doing accurate distance measurement. The repetition frequencies of the optical frequency combs are different, thus parts of the high frequencies such as several gigahertz of self beats are beat-downed to several megahertz without an RF frequency oscillator. The phases of the beat signals of several megahertz frequencies are measured by a lock-in amplifier with a high resolution and high sensitivity. The new method is applied to distance measurement for objects which have rough-surface in the distance range of several-meters.

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Periodical:

Key Engineering Materials (Volumes 523-524)

Pages:

877-882

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.523-524.877

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Cite this paper

Online since:

November 2012

Authors:

Taro Onoe, Satoru Takahashi, Kiyoshi Takamasu, Hirokazu Matsumoto

Keywords:

Distance Measurement, Non-Contact Measurement, Optical Frequency Comb

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References

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