Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1987-01-14
1991-07-02
Buczinski, Stephen C.
Optics: measuring and testing
Range or remote distance finding
With photodetection
356349, 2503381, G01C 308, G01B 902
Patent
active
H00009334
ABSTRACT:
A dual-beam amplitude-modulated laser transmitter/receiver suitable for laser-radar applications is scalable to high powers because there is no active modulator element that the laser beam passes through. The transceiver comprises a laser source with two separate independent laser optical cavities. Each laser cavity is similar, but each operates at its own frequency. Signals from the two cavities are superimposed at a combining beam splitter to form two transmitter output beams with each combined beam intensity modulated at the laser difference frequency. The output consists of two beams separated in elevation and with equal beam powers from each laser cavity the intensity modulation is 100%. Each beam has its own homodyne detector and separate local oscillator. Thus, each beam path is considered to be a distinct homodyne transceiver. If the frequency of one of the laser sources is changed in time, an AM/FM/CW output suitable for absolute range measurements and fine doppler is generated. The laser transmitter does not require internal or external modulators such as acousto-optic or electro-optic cells. Thus, it is not limited by the modulator characteristics.
REFERENCES:
patent: 3258597 (1966-06-01), Forrester
patent: 3302027 (1967-01-01), Fried et al.
patent: 3409369 (1968-11-01), Bickel
patent: 3573463 (1971-04-01), Goodwin et al.
patent: 4195221 (1980-03-01), Moran
patent: 4391515 (1983-07-01), Forrester et al.
C. J. Buczek et al., "Laser Injection Locking", Proc. IEEE, vol. 61, pp. 1411-1431, Oct. 1973.
Buczek Carl J.
Pizzurro Vito F.
Buczinski Stephen C.
Franz Bernard E.
Singer Donald J.
The United States of America as represented by the Secretary of
Wallace Linda J.
LandOfFree
Infrared coherent optical sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Infrared coherent optical sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Infrared coherent optical sensor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1236709