Linear FM chirp laser

Optics: measuring and testing – Range or remote distance finding – With photodetection

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332 751, 350356, 342201, 356 285, 372 12, 372 28, 372 32, G01C 300, H01S 300, G01S 728

Patent

active

046662952

ABSTRACT:
A laser radar system employing a linear FM chirp laser followed by post detection pulse compression by a surface acoustic wave (SAW) device. The system includes an FM chirp modulator that provides the needed tuning range and linearity for pulse compression. This modulation is accomplished by using a high-pressure CO.sub.2 laser with an intracavity electro-optic modulator of CdTe. The frequency of the transmitter laser is accurately controlled through the application of high linearity, high frequency, sawtooth voltages to the two plates of the CdTe crystal, with the voltage waveform applied to one plate being out of phase with that applied to the other crystal plate. With the performance the system offers, absolute radar ranges can be measured to 0.22 m and velocities to 0.37 m/sec.

REFERENCES:
patent: 3363248 (1968-01-01), Nicodemus
patent: 3713042 (1973-01-01), Kinsel
patent: 3950100 (1976-04-01), Keene et al.
patent: 4190361 (1980-02-01), Dubrunfaut
patent: 4240746 (1980-12-01), Courtenay et al.
patent: 4284351 (1981-08-01), Alldritt et al.
patent: 4447149 (1984-05-01), Marcus et al.
patent: 4528525 (1985-07-01), Eden et al.
J. E. Kiefer et al., IEEE Journal of Quantum Electronics, Feb. 1972, p. 173.
A. Yariv et al., IEEE Journal of Quantum Electronics, vol. QE-9, No. 6, Jun. 1973, p. 594.

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