Accession Number : AD0163561

Title :   Method of Apparatus for Tracking an Invisible Gas Laser Beam.

Descriptive Note : Patent,

Corporate Author : OFFICE OF THE SECRETARY OF THE ARMY WASHINGTON D C

Personal Author(s) : Willett,Colin S.

Report Date : 10 AUG 1971

Pagination or Media Count : 4

Abstract : A superradiant transient-type laser material is added to a gas laser such as the CO2 far infrared laser and the combination is excited by extremely fast rise-time excitation pulse that induce laser emission in both the CO2 and the superradiant additive to produce a dual simultaneous emission. If the superradiant material is one whose stimulated emission falls within the visible spectrum, it will provide a visible tracer for the invisible 10.6 micron CO2 laser beam. The superradiant additive can also be chosen so that its wavelength falls just outside the visible spectrum where good detectors or image intensifiers are available, thus improving greatly the detection means normally available for the CO2 laser beam alone. A compound mirror can be used at one end of the gas laser cavity for enhancing the oscillations of both lasing materials. (Author)

Descriptors :   (*INFRARED TRACKING, *PATENTS), (*COHERENT RADIATION, OPTICAL TRACKING), (*INFRARED LASERS, TEST METHODS), GAS LASERS, INFRARED RADIATION, TRACER STUDIES

Subject Categories : Lasers and Masers
      Infrared Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE