PULSE DOPPLER LASER RADAR
Assignee
Filed
Nov 23, 1990
Granted
Nov 30, 1993
Location
STUART FL US
Abstract
A pulse Doppler, laser radar as described which includes master laser whose output Fo is shifted in frequency by dF(t) during its amplification. The dF(t) frequency shift is compensated by providing a modulator which modulates the master laser output frequency Fo with a local oscillator signal F1. A first mixer is provided which combines the shifted master laser frequency signal and the local oscillator modulated, master laser output so as to eliminate the master laser frequency Fo from the combined signals. A second mixer is provided for combining the reflected, Doppler shifted laser signal with the local oscillator modulated, master laser output signal Fo +F1 to eliminate the master laser output frequency Fo from the combined signal. Additional detection circuitry is provided to determine the difference in frequencies of the combined signals from the first and second mixers so as to isolate the Doppler shift signal from the amplifier-induced shift dF(t). An additional frequency control subsystem for the master laser is also described which employs an absorption cell in the feedback loop.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Mar 5, 1991
Rescinded
Jul 14, 1993
Duration
2 years, 4 months
Inventor
- 1ALAN B. CALLENDER
Technology Domains
Click a domain to browse all patents in this category.
Record Details
- Patent number
- US 5267011
- Application
- 07617847
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
More from this assignee
IMPROVED CATALITIC SYNTHESIS OF CAGED POLYNITRAMINE COMPOUNDS
SOLID ROCKET PROPELLANT
DUAL INFRARED BAND OBJECTIVE LENS
BANDGAP RADIATION DETECTOR
METHOD OF FORMING TEXTURED HIGH-TEMPERATURE SUPERCONDUCTORS
APPARATUS FOR CONTROLLING THE POSITION AND DIRECTION OF A LASER BEAM
Related by domain
RLG OPTICAL NOISE INJECTOR
Rockwell International
LARGE OPTICS COMPENSATED IMAGING SYSTEMS
NORTHROP GRUMMAN SPACE & MISSION SYSTEMS CORP.
SIGNAL PROCESSOR FOR ELIMINATION OF SIDELOBE RESPONSES AND GENERATION OF ERROR SIGNALS
FREDERICK HEROLD & ASSOCIATES, INC.
RADIATION SENSOR
SECRETARY OF STATE FOR DEFENCE IN HER BRITANNIC MAJESTY'S GOVERNMENT OF THE UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND, THE
IR/LADAR SCANNER
LORAL SYSTEMS GROUP, A DIVISION OF LORAL CORP.
CONFORMAL PHASED ARRAY ANTENNA
General Dynamics