Accession Number : AD0714023

Title :   Mode-Locking of an Atmospheric Pressure Cross-Excited Electrically Pulsed CO2 Laser.

Descriptive Note : Technical rept.,

Corporate Author : UNITED AIRCRAFT CORP EAST HARTFORD CONN RESEARCH LABS

Personal Author(s) : Smith,David C. ; Berger,Paul J.

Report Date : OCT 1970

Pagination or Media Count : 13

Abstract : Self-mode-locking of a cross-excited electrically pulsed CO2 laser has been observed and studied as a function of cavity length and operating pressure. The best results are achieved with a 2.2 meter cavity having an active length of 1.5 meters. At a pressure of 450 Torr three axial modes are locked to give a train of 5 nsec pulses. Shorter pulses on the order of 2-3 nsec are seen at higher pressures, but the modulation and pulse shape are not as reproducible. With longer cavities more axial modes are locked, resulting in a longer dead time between pulses; however, the pulse widths increase. This indicates that less of the bandwidth is utilized with closely spaced axial modes. (Author)

Descriptors :   (*GAS LASERS, PULSES), CARBON DIOXIDE, PERFORMANCE(ENGINEERING), BAROMETRIC PRESSURE

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE