Accession Number : ADD017573

Title :   Compact Rapidly Modulatable Diode-Pumped Visible Laser.

Descriptive Note : Patent, Filed 7 Apr 94, patented 2 May 95,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Scheps, Richard

Report Date : 02 May 1995

Pagination or Media Count : 18

Abstract : An apparatus for producing rapidly modulated coherent optical emission is described in which a doubly resonant cavity produces amplitude modulated sum frequency generation. The configuration of the resonator provides a region where both fundamental wavelengths are overlapped and another region where both fundamental wavelengths are spatially distinct. The resonator further contains a laser gain element in the other region where the wavelengths are spatially distinct to produce one of the two fundamental resonant wavelengths. A laser source injects a signal into the resonator at the other resonant wavelength. The injected wavelength is at or near a wavelength for which the laser gain element can be optically pumped. In one embodiment one laser both injects a signal into the resonator and simultaneously pumps the laser gain element contained within the resonator cavity. The resonator further contains a nonlinear crystal for intracavity sum frequency generation of the two fundamental wavelengths. By amplitude modulation of the injected signal an amplitude modulated sum frequency generated signal is produced. Sum frequency generation at 439 nm is described in a noncritically phase matched Type II KTP crystal by simultaneously resonating the cavity at 1.318 microns and 659 nm.

Descriptors :   *TUNABLE LASERS, *PATENTS, *OPTICAL PUMPING, LASER PUMPING, LASER CAVITIES, EMISSION, FREQUENCY MODULATION, COHERENCE, SEMICONDUCTOR LASERS, CRYSTALS, NONLINEAR OPTICS, CONFIGURATIONS, VISIBILITY, GAIN, MODULATION, AMPLITUDE MODULATION, CAVITY RESONATORS

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE