Linear fm chirp laser

Patent · Tue May 19 00:00:00 EDT 1987

OSTI ID:6364000

Duvall, R L; Halmos, M J; Henderson, D M

The method is described of operating a laser radar system comprising the steps of: actuating a transmitter laser to emit laser light at approximately a preselected center frequency; frequency modulating the light of the transmitter laser in linear chirps by passing it through an electro-optical crystal disposed within the cavity of the transmitter and driving the crystal with linear chirp drive signal from a precision linear driver; and actuating a local oscillator laser to emit laser light at a predetermined frequency offset from the center frequency by a frequency substantially greater than the maximum frequency shift of the transmitter laser.

• Assignee: Hughes Aircraft Co., Los Angeles, CA
• Patent Number(s): US 4666295
• OSTI ID: 6364000
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
DATA ANALYSIS
DATA PROCESSING
ELECTRO-OPTICAL EFFECTS
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
EQUIPMENT
FREQUENCY MODULATION
FREQUENCY SELECTION
HETERODYNE RECEIVERS
LASER RADIATION
LASERS
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
MODULATION
OPERATION
OSCILLATORS
PROCESSING
PULSES
RADAR
RADIATIONS
RADIO EQUIPMENT
RANGE FINDERS
SIGNALS
SOUND WAVES