Accession Number : AD0743491

Title :   Investigation of Nonlinear Propagation and Chirping of Short CO2 Laser Pulses.

Descriptive Note : Annual summary rept., 1 Apr 71-31 Mar 72,

Corporate Author : UNITED AIRCRAFT RESEARCH LABS EAST HARTFORD CONN

Personal Author(s) : Berger,Paul J. ; Smith,David C. ; Ferrar,Carl M. ; Flynn,J. Terrence ; Cheo,Peter K.

Report Date : 30 APR 1972

Pagination or Media Count : 101

Abstract : The research investigations have led to the development of an acousto-optic modulator for mode-locking the high pressure CO2 laser. Nanosecond pulses have been generated with peak powers of about 25 Megawatts, the high peak power resulting from low insertion loss Brewster-angled germanium modulator. A photon-drag detector with a response time of 0.3 nsec was also developed for observing the mode-locked pulses. The design of a solid-cathode double-discharge electrically pulsed CO2 laser is described. Preliminary studies of thin film GaAs waveguides for 10.6 micron wavelength radiation have been undertaken with a view to the development of future modulators. A continuing semi-empirical design approach has resulted in an operational, though still short-lived, flowing copper vapor laser based on a continuous evaporation-condensation flow cycle.

Descriptors :   (*GAS LASERS, LIGHT PULSES), (*INFRARED LASERS, POWER), COHERENT RADIATION, MODULATION, GAIN, WAVEGUIDES, GALLIUM ARSENIDES

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE