Ghz Traveling-Wave Optical Modulator For Precision Distance Measurement

Ichiro Fujima; Katuo Seta; Hirokazu Matsumoto; Tadanao Oh`ishi

doi:10.1117/12.944251

12 April 1988 Ghz Traveling-Wave Optical Modulator For Precision Distance Measurement

Ichiro Fujima, Katuo Seta, Hirokazu Matsumoto, Tadanao Oh`ishi

Proceedings Volume 0889, Airborne and Spaceborne Lasers for Terrestrial Geophysical Sensing; (1988) https://doi.org/10.1117/12.944251
Event: 1988 Los Angeles Symposium: O-E/LASE '88, 1988, Los Angeles, CA, United States

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%.

Citation Download Citation

Ichiro Fujima, Katuo Seta, Hirokazu Matsumoto, and Tadanao Oh`ishi "Ghz Traveling-Wave Optical Modulator For Precision Distance Measurement", Proc. SPIE 0889, Airborne and Spaceborne Lasers for Terrestrial Geophysical Sensing, (12 April 1988); https://doi.org/10.1117/12.944251

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