ABSOLUTE LENGTH-MEASURING SYSTEM BY AUTOMATIC INTERFERENCE-FRINGE-PEAK DETECTION WITH OPTICAL-COMB FIBER INTERFEROMETER

• Abstract:

  Optical frequency comb has various characteristics such as short pulse, broad spectra, many spectral lines, and high temporal coherency. In this present, new absolute length-measuring technique with a high resolution of 0.1 µm is developed by using temporal-coherence interferometry of optical comb and a short translation stage for various length ranges. A new fiber Fabry-Perot etalon of a free spectral range of a frequency of 15 GHz is developed for improving the fine positioning in space. Moreover, interference-fringe-peak is automatically achieved by developing a new analog electric circuit. One position is measured round several milliseconds depending to the SN ratio of the signal detected for various ranges of the lengths measured.
• Keywords:

  length/distance measurement, high repetition frequency, optical comb, absolute metrology
• Download:

  IMEKO-TC14-2014-19.pdf
• DOI:

  _unreg_tc14-2014.19

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:

  3 September 2014 - 5 September 2014