High-resolution, high-speed photorefractive incoherent-to-coherent optical converter.

Photorefractive incoherent-to-coherent optical converter.

Contrast-reversible photorefractive incoherent-to-coherent optical converter by using an anisotropic strong volume hologram.

In the past several years photorefractive materials have been proposed for use as photorefractive incoherent-to-coherent optical converters (PICOC's) because of their dynamic real-time grating recording properties.'5 In a general PICOC, the imagebearing incoherent light is used to erase the grating, which is constructed by two coherent writing beams. The output image is carried by the diffracte...

Waveguides and waveguide arrays formed by incoherent light in photorefractive materials

We report on experimental observations of nonlinear optical waveguides and waveguide arrays formed by incoherent light in photorefractive materials. Such waveguides are made possible by creating partially spatially incoherent solitons in a noninstantaneous self-focusing photorefractive medium. In addition to planar, Y-junction, and circular waveguides, we report the first demonstration of pixel...

Crosstalk rejection in parallel optical coherence tomography using spatially incoherent illumination with partially coherent sources.

The continuing improvement of high-speed area-scan cameras has made possible the construction of parallel optical coherence tomography (OCT) systems that are competitive with the fastest demonstrated swept-source OCT systems. Unfortunately, when imaging through turbid media using a partially coherent source, parallel OCT suffers resolution loss from coherent multiple scattering, a phenomenon kn...

Collision-induced shape transformations of partially coherent solitons

Partially coherent solitons are objects which have recently attracted a great deal of attention @1–10#. Focusing of the spatially partially coherent beams has been suggested as early as in 1967 @11# and studied subsequently in @12,13#. On the other hand, temporally incoherent solitons have been considered in the original works of Hasegawa @14–16#, both for plasma waves and for nonlinear pulses ...