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Proceedings Paper

Ghz Traveling-Wave Optical Modulator For Precision Distance Measurement
Author(s): Ichiro Fujima; Katuo Seta; Hirokazu Matsumoto; Tadanao Oh`ishi
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Paper Abstract

Traveling-wave type optical modulators using LiTa03 crystals have been designed and fabricated for high resolution distance measurement. The modulation property of the modulator is characterized at GHz frequencies. The distance measuring-system is constructed using two of these optical modulators and is preliminarily tested. The modulators were driven by slightly different frequencies in the GHz region in order to measure the phase of the modulated signal using the heterodyne method. The displacement of a target was measured with a resolution of 15pm and with a linearity of 0.2%.

Paper Details

Date Published: 12 April 1988
PDF: 6 pages
Proc. SPIE 0889, Airborne and Spaceborne Lasers for Terrestrial Geophysical Sensing, (12 April 1988); doi: 10.1117/12.944251
Show Author Affiliations
Ichiro Fujima, National Research Laboratory of Metrology (Japan)
Katuo Seta, National Research Laboratory of Metrology (Japan)
Hirokazu Matsumoto, National Research Laboratory of Metrology (Japan)
Tadanao Oh`ishi, National Research Laboratory of Metrology (Japan)


Published in SPIE Proceedings Vol. 0889:
Airborne and Spaceborne Lasers for Terrestrial Geophysical Sensing
Frank Allario, Editor(s)

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