Eye-safe coherent laser radar

Details Eye-safe coherent laser radar Eye-safe coherent laser radar

1988-03-22

1990-02-20

Tarcza, Thomas H.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 285, 330 43, G01C 308, G01P 336

Patent

active

049021273

ABSTRACT:
In an eye-safe coherent laser radar, a laser diode optically pumps a solid state non-planar ring laser to produce the coherent output laser radiation. The laser radiation is passed through a Faraday isolator to an optically pumped slab three-stage linear amplifier imparting 56 db gain. A telescope transmits the amplified laser radiation to illuminate a target. Optical radiation returned from the target is collected by the telescope and focused into a single transverse mode fiber-optic waveguide for combination in the fiber with reference lasant radiation by means of a single mode fiber coupler. The combined optical radiation is then detected by a photodetector to produce a difference frequency output representative of parameters of the target.

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