Accession Number : ADD015337

Title :   Laser Diode Pumped Multiple Rod Ring Laser Allowing Combination of Multiple Pump Sources.

Descriptive Note : Patent, Filed 7 May 91, patented 17 Mar 92,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Scheps, Richard

Report Date : 17 Mar 1992

Pagination or Media Count : 11

Abstract : A diode pumped ring laser allows for the combination of more pumping mode radiation from pumping laser diodes for pumping at least one gain element which is simultaneously end pumped in two longitudinal resonator axes that intersect in a focused waist at a bounce point. Each gain element and associated mirrors are disposed to direct a hemispherical shaped resonator mode to a focus (waist) in each gain element where the resonator mode is reflected from the waist and diverges away to thereby form two cone-shaped active volumes in each gain element. Locating and orienting pumping diodes to longitudinally end pump the resonator modes with their pumping radiation to have a nearly perfect overlap of the resonator mode throughout the length of the active volumes in each gain element assures a more efficient, higher power end pumping of the gain elements. Appropriately arranging gain elements and mirrors directs pumping mode radiation to enter an exterior face and leave through an interior face of each gain element. Resonator mode radiation enters and leaves through the interior face of each gain element at a large enough angle, such as the Brewster's angle, which, in addition to allowing the pumping of both active volumes within each gain element rod, also provides for a high degree of linear polarization of the resonant mode and promotes stable unidirectional operation of the ring laser.

Descriptors :   *PATENTS, *RING LASERS, SOURCES, PUMPING, DIODES, MULTIPLE BEAMS(RADIATION)

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE