An acousto-optic modulator for a CO2 laser rangefinder using heterodyne detection

1980 ◽  
Vol 12 (5) ◽  
pp. 419-426 ◽  
Author(s):  
B. S. Collins ◽  
K. F. Hulme ◽  
N. A. Lowde
Keyword(s):  
Co2 Laser ◽  
Heterodyne Detection ◽  
Laser Rangefinder ◽  
Acousto Optic Modulator

A CO2 laser rangefinder using heterodyne detection and chirp pulse compression

1981 ◽  
Vol 13 (1) ◽  
pp. 35-45 ◽  
Author(s):  
K. F. Hulme ◽  
B. S. Collins ◽  
G. D. Constant ◽  
J. T. Pinson
Keyword(s):  
Co2 Laser ◽  
Pulse Compression ◽  
Heterodyne Detection ◽  
Chirp Pulse ◽  
Laser Rangefinder

Design and Development of a Pulsed CO2 Laser Rangefinder

1988 ◽  
Vol 17 (4) ◽  
pp. 91-93
Author(s):  
D. P. Juyal ◽  
N. K. Barthwal ◽  
A. L. Singh ◽  
S. P. Gupta ◽  
M. T. Rudrappa ◽  
...  
Keyword(s):  
Co2 Laser ◽  
Laser Rangefinder ◽  
Design And Development ◽  
Pulsed Co2 Laser

CO2-Laser Heterodyne Detection with GaAs/AlGaAs MQW Structures

1994 ◽  
pp. 207-220 ◽  
Author(s):  
E. R. Brown ◽  
K. A. McIntosh ◽  
K. B. Nichols ◽  
F. W. Smith ◽  
M. J. Manfra
Keyword(s):  
Co2 Laser ◽  
Heterodyne Detection ◽  
Laser Heterodyne

Integrated FLIR/CO2 Laser Rangefinder

1986 ◽  
pp. 643-643
Author(s):  
C. O. Taylor ◽  
B. N. Berdanier ◽  
R. K. Powell
Keyword(s):  
Co2 Laser ◽  
Laser Rangefinder

A high-speed-modulated retro-reflector for lasers using an acousto-optic modulator

2003 ◽  
Vol 81 (4) ◽  
pp. 625-638 ◽  
Author(s):  
G Spirou ◽  
I Yavin ◽  
M Weel ◽  
A Vorozcovs ◽  
A Kumarakrishnan ◽  
...  
Keyword(s):  
Laser Beam ◽  
Acoustic Waves ◽  
High Speed ◽  
Incident Beam ◽  
Bragg Diffraction ◽  
Heterodyne Detection ◽  
Incident Laser Beam ◽  
Signal To Noise ◽  
Incident Laser ◽  
Acousto Optic Modulator

We have used an acousto-optic modulator (AOM) to impose a frequency-modulated signal on an incident laser beam. The incident laser beam is focussed into the AOM where it undergoes Bragg diffraction and is then retro-reflected. The diffracted beam is also retro-reflected so that it is diffracted again by the AOM and overlaps the incident beam. The overlapped beams are frequency shifted with respect to each other. These features allow us to detect the frequency-modulated signal with high signal-to-noise ratio using heterodyne detection. Since the optical setup is simple and can be made very compact, this device may be ideal for certain forms of high-speed, free-space optical communication. We demonstrate a 1 MHz data transmission rate in the Bragg regime. We measured the acceptance angle of the device and find that it is limited only by the divergence of the focussed laser beam and the divergence of the acoustic waves in the AOM crystal. We have also studied the range of acoustic frequencies and drive power of the AOM, for which the retro-reflected beam can be detected with adequate signal to noise. PACS Nos.: 42.60.–V, 42.62.Cf, 42.62.Fi, 42.79.Sz, 42.79.Hp

Pulsed CO2 laser scattering from a hydrogen arc plasma and heterodyne detection

1975 ◽  
Vol 51 (3) ◽  
pp. 178-180 ◽  
Author(s):  
A. Gondhalekar ◽  
E. Holzhauer
Keyword(s):  
Co2 Laser ◽  
Heterodyne Detection ◽  
Arc Plasma ◽  
Laser Scattering ◽  
Pulsed Co2 Laser

Heterodyne CO2 laser rangefinder using pulse compression

1981 ◽  
Author(s):  
G. Courrier ◽  
J. L. Duvent ◽  
G. Ringehbagh ◽  
J. J. Bernard ◽  
G. De Gorueu ◽  
...  
Keyword(s):  
Co2 Laser ◽  
Pulse Compression ◽  
Laser Rangefinder
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