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Optical Engineering

High-resolution distance meter using optical modulators at 3.5 GHz
Author(s): Ichiro Fujima; Katuo Seta; Hirokazu Matsumoto; Hisashi Yoshida
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Paper Abstract

A high-resolution distance meter is fabricated using optical waveguide modulators. The modulation frequencies of the optical modulators are around 3.5 GHz, while the modulation frequencies of the optical intensity are around 7 GHz because the modulation bias voltages are set at the peaks of the electrooptic characteristics. The distance meter was evaluated in the National Research Laboratory of Metrology (NRLM) tunnel, which is a semiunderground tunnel. The measurement resolution has a standard deviation of 12 ?m for a distance range of 0.5 to 5 m after correction of the cyclic error.

Paper Details

Date Published: 1 December 1997
PDF: 4 pages
Opt. Eng. 36(12) doi: 10.1117/1.601573
Published in: Optical Engineering Volume 36, Issue 12
Show Author Affiliations
Ichiro Fujima, National Research Lab. of Metrology (Japan)
Katuo Seta, National Research Lab. of Metrology (Japan)
Hirokazu Matsumoto, National Research Lab. of Metrology (Japan)
Hisashi Yoshida, Nikon Corp. (Japan)


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