Abstract

Broadband parametric amplification is applied for the femtosecond ultrafast fluorescence research. The time resolution depends on duration of pump pulse, which works both as pump source and gate. For spectrum application, a special phase-matching angle exists for broadband amplification correspondence to the pump wavelength. The broadband amplification range from 500 to 750 nm was found for 'beta'-barium borate (BBO) crystal, pumped at 400 nm. Large dye fluorescence amplification of 10^(7) is realized. The generation of cone emission is selected as reference for system tuning. It is supposed to be a new method for ultrafast study in fluorescence comparable to fluorescence up-conversion and optical Kerr gate techniques.

© 2005 Chinese Optics Letters

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