FM laser transmitter

Details FM laser transmitter FM laser transmitter

1988-11-21

1990-06-12

Tarcza, Thomas H.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 285, 455611, 372 28, 372 97, G01C 308, H01S 310, H01S 3082

Patent

active

049327755

ABSTRACT:
A laser transmitter utilizes optical far field combination of two independent lasers (80,90) and variation of RF exciting power (86) to one (80) to produce sufficient frequency modulation. Two bores (122,124) within the same dielectric body (120) are provided with two independent sets of electrodes (134,135, 138,139) and two independent RF power sources (150,152). The lasers are operated at different frequencies and the beams transmitted in parallel adjacent paths to provide a combined far field optical beam component at the beat frequency of the two lasers. Variation of the frequency of one of the lasers provides frequency modulation of the far field beat frequency, enabling reception and demodulation of the modulated beam without use of a local oscillator laser at the receiver. The transmitter may also be used in a laser radar.

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