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Heterodyne CO2 laser rangefinder using pulse compression

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Abstract

A new heterodyne laser rangefinder using pulse compression has been studied and a prototype experiment performed. A cw CO2 laser frequency stabilized with a 7-W output was used. The emitted beam is modulated in a series of pulses of 40-μsec duration and with a 10-kHz pulse repetition rate. In each pulse a frequency modulation is carried out: during the first 20 μ-sec the modulation frequency is varied from 140 to 160 MHz and during the last 20 μsec from 160 to 140 MHz. Both variations are linear vs time.

© 1981 Optical Society of America

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