REALIZATION OF LENGTH TRACEABILITY BY A FEMTOSECOND OPTICAL FREQUENCY COMB
Dong Wei, Masato Aketagawa
Abstract:
The national standard of length in Japan changed from the iodine-stabilized He–Ne laser to a femtosecond optical frequency comb (FOFC) in 2009. This means that there are different frequencies and their combination, adjacent pulse repetition interval length (APRIL), which can be used as a scale since an FOFC is a phase-coherent combination of several hundreds of thousands of wavelengths. Thus, the following questions arise naturally: Which parameters can be used as a scale? What are their characteristics? The goal of this paper is to answer these questions. We show the similarity and the difference between wavelength and APRIL for length measurement, and we discuss new concepts of APRIL-based length measurement. The status of the experiment is reported.
Keywords:
length ruler, ambiguity, laser optics, length measurement, metrology
Download:
IMEKO-TC14-2014-55.pdf
DOI:
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Event details
IMEKO TC:
TC14
Event name:
TC14 LMPMI Symposium 2014
Title:

11th Symposium on Laser Metrology for Precision Measurement and Inspection in Industry

Place:
Tsukuba, JAPAN
Time:
03 September 2014 - 05 September 2014
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