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Coherence switching of a degenerate VECSEL for multimodality imaging
Sebastian Knitter, Changgeng Liu, Brandon Redding +3
We demonstrate a VECSEL (vertical external cavity surface emitting laser) based degenerate source with an adjustable degree of spatial coherence that is electrically pumped, mechan…
Broadband Coherent Enhancement of Transmission and Absorption in Disordered Media
Chia Wei Hsu, Arthur Goetschy, Yaron Bromberg +2
We study the optimal diffusive transmission and absorption of broadband or polychromatic light in a disordered medium. By introducing matrices describing broadband transmission and…
Fluctuations and Correlations of Emission from Random Lasers
Jason W. Merrill, Hui Cao, Eric R. Dufresne
When light travels through strongly scattering media with optical gain, the synergy between diffusive transport and stimulated emission can lead to lasing action. Below the thresho…
Minimum reflection channel in amplifying random media
Seng Fatt Liew, Hui Cao
We present a numerical study on the minimum reflection channel in a disordered waveguide and its modification by coherent amplification of light. The minimum reflection channel is…
Low-spatial-coherence broadband fiber source for speckle free imaging
Brandon Redding, Peyman Ahmadi, Vadim Mokan +3
We designed and demonstrate a fiber-based amplified spontaneous emission (ASE) source with low spatial coherence, low temporal coherence, and high power per mode. ASE is produced b…
Control of mesoscopic transport by modifying transmission channels in opaque media
Raktim Sarma, Alexey Yamilov, Seng Fatt Liew +2
While controlling particle diffusion in a confined geometry is a popular approach taken by both natural and artificial systems, it has not been widely adopted for controlling light…