Ultrafast time-and-space-domain holography by spectral hole burning in dye-doped polymers
Rebane, A. (1998). Ultrafast time-and-space-domain holography by spectral hole burning in dye-doped polymers. Chimia, 52 (3), 112−117.
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English, Certain photochromic materials exhibit at liquid-helium temperature a special property of very high selectivity in frequency dimension, This phenomenon, commonly known as spectral hole burning (SHB), makes it possible to extend conventional spatial-domain optical data storage into the dimensions of frequency and time. We have applied SHB for ultrafast recording of holograms and coherent optical processing on the timescale of 10(-12)-10(-13) s. To achieve ultrafast performance in the time domain. we use special organic dye-doped polymer materials, which provide SHB recording in a broad optical band width of 5-10 THz. In this paper, we discuss recording and playback of holograms of pico-and femtosecond time-and-space-domain signals using dye-doped SHB polymers at liquid-helium temperature, We discuss unusual properties of SHB holograms such as causality-related asymmetry of diffraction and inversion of the time coordinate, ultrafast frequency-domain processing, and associative recall of events.
FREQUENCY-SELECTIVE MEDIA; LIGHT SIGNALS; PHOTON-ECHOES; STORAGE;