Controlled frequency high power laser

Details Controlled frequency high power laser Controlled frequency high power laser

1977-03-28

1980-01-01

Sikes, William L.

Oscillators

Molecular or particle resonant type

H01S 310

Patent

active

041818989

ABSTRACT:
A system 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 electronically 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.

REFERENCES:
patent: 3944947 (1976-03-01), Pike et al.
Bondarenko et al., Stabilization of a Ruby Laser Using an He-Ne Laser as a Frequency Reference, JETP Lett., vol. 22, No. 2 (Jul. 20, 1975), pp. 46 and 47.

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