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Proceedings Paper

Absolute length calibration of gauge blocks using optical comb of a femtosecond pulse laser
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Paper Abstract

We report an exploitation of the optical comb of a femtosecond pulse laser as the wavelength ruler for the task of absolute length calibration of gauge blocks. To that end, the optical comb was stabilized to an Rb atomic clock and an optical frequency synthesizer was constructed by tuning an external single-frequency laser to the optical comb. The absolute height of gauge blocks was measured by means of multi-wavelength interferometry using multiple beams of different wavelengths consecutively provided by the optical frequency synthesizer. The wavelength uncertainty was measured 1.9 × 10-10 that leads to an overall calibration uncertainty of 17 nm (k=1) in determining the absolute length of gauge blocks of 25 mm nominal length.

Paper Details

Date Published: 14 August 2006
PDF: 8 pages
Proc. SPIE 6292, Interferometry XIII: Techniques and Analysis, 62920O (14 August 2006); doi: 10.1117/12.678448
Show Author Affiliations
Jonghan Jin, Korea Advanced Institute of Science and Technology (South Korea)
Young-Jin Kim, Korea Advanced Institute of Science and Technology (South Korea)
Yunseok Kim, Korea Advanced Institute of Science and Technology (South Korea)
Chu-Shik Kang, Korea Research Institute of Standards and Science (South Korea)
Seung-Woo Kim, Korea Advanced Institute of Science and Technology (South Korea)


Published in SPIE Proceedings Vol. 6292:
Interferometry XIII: Techniques and Analysis
Katherine Creath; Joanna Schmit, Editor(s)

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