77 research outputs found
New BioPhotonics Workstation for parallel and real-time trapping, manipulating and characterizing of microscopic specimens
Frequency up-conversion based single photon, mid-IR spectral imaging with 20% quantum efficiency
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:YVO4 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
Three-dimensional imaging and three-dimensional coordinate gathering in three-dimensional optical micromanipulation system
Dynamic greyscale intensity landscapes:Generalized phase contrast and computer-generated holography
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