Continuous-wave CO2 laser range finder using heterodyne detection and pulse-code modulation

R. J. L. Lerou

doi:10.1364/CLEO.1982.FB2

Conference on Lasers and Electro-Optics
OSA Technical Digest (Optica Publishing Group, 1982),
paper FB2
•https://doi.org/10.1364/CLEO.1982.FB2

Continuous-wave CO₂ laser range finder using heterodyne detection and pulse-code modulation

R. J. L. Lerou

Conference on Lasers and Electro-Optics 1982

Phoenix, Arizona United States
14–16 April 1982
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Lasers for Ranging and Radar (FB)

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R. J. L. Lerou, "Continuous-wave CO2 laser range finder using heterodyne detection and pulse-code modulation," in Conference on Lasers and Electro-Optics, R. Abrams and A. Guenther, eds., OSA Technical Digest (Optica Publishing Group, 1982), paper FB2.

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Abstract

A CO₂ laser range finder has been built utilizing an acoustooptic modulator to obtain an amplitude- modulated optical beam from a cw laser operating in the TEM₀₀ mode.¹ An on-off deflected beam was obtained by driving the modulator by a binary pulse-code modulated 40-MHz carrier. At this frequency the deflection efficiency amounted to 20% (maximum of our modulator), and a deflection rise time of 300 nsec was achieved.

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