Controlled frequency high power laser

Patent · Tue Jan 01 04:00:00 EST 1980

OSTI ID:5240840

McAllister, G L

A system is described for frequency locking the output of one or many laser amplifiers to a reference laser oscillator beam without injection of the reference beam into the amplifier medium. This avoids the necessity of exciting at the frequency of the desired output and of beam splitting from the oscillator to inject a portion of the oscillator radiation into each of several controlled amplifiers. The amplifier includes a lasing medium confined within a cavity and having a portion of the radiation in the medium directed onto a closed loop. A frequency selecting element is supplied within the closed loop and controlled electronicaly to maintain a predetermined frequency relationship to the laser beam of the reference laser oscillator. Radiation in the closed loop is thus controlled in frequency and a portion of it within the amplifier medium is diverted for repeated medium traversals in an unstable cavity configuration to achieve a desired amplification and pulse elongation.

• Assignee: Jersey Nuclear-Avco Isotopes, Inc.
• Patent Number(s): US 4181898
• OSTI ID: 5240840
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
AMPLIFIERS
DESIGN
ELECTRONIC EQUIPMENT
FREQUENCY CONTROL
LASERS