Enhanced 2D-image upconversion using solid-state lasers.
Based on enhanced upconversion, we demonstrate a highly efficient method for converting a full image from one part of the electromagnetic spectrum into a new desired wavelength region. By illuminating a metal transmission mask with a 765 nm Gaussian beam to create an image and subsequently focusing the image inside a nonlinear PPKTP crystal located in the high intra-cavity field of a 1342 nm solid-state Nd:YVO(4) laser, an upconverted image at 488 nm is generated. We have experimentally achieved an upconversion efficiency of 40% under CW conditions. The proposed technique can be further adapted for high efficiency mid-infrared image upconversion where direct and fast detection is difficult or impossible to perform with existing detector technologies.
Pedersen
Christian
C
DTU Fotonik, Technical University of Denmark, DK-4000 Roskilde, Denmark. christian.pedersen@risoe.dk
Karamehmedović
Emir
E
Dam
Jeppe Seidelin
JS
Tidemand-Lichtenberg
Peter
P
D003460:Crystallization; D004867:Equipment Design; D007259:Infrared Rays; D007834:Lasers; D053844:Lasers, Solid-State; D008670:Metals / Q000737:chemistry; D016011:Normal Distribution; D055095:Optics and Photonics / Q000379:methods*; D012825:Silicon / Q000737:chemistry; D013055:Spectrophotometry, Infrared / Q000379:methods
D008670:Metals; D012825:Silicon