Abstract
Holograms recorded in planar optical waveguides by 30 fs pulses from the second harmonic of a Ti:Sapphire laser (λ is about 400 nm) are investigated. The 20 μm thick films of dichromated gelatin (n<sub>2</sub> = 1 .54) deposited on a polished quartz substrate (n<sub>1</sub> = 1 .456) is used as a planar waveguide model. The recording pulses enter the planar waveguide through its upper surface. Reconstruction in the waveguide regime is investigated for the cases when λ ≅633 nm and λ lies between 1150 and 1250 nm.
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