The design and operation characteristics of a low-Q cavity dye laser chain pumped by a single laser (seeded Q-switched Nd:YAG) for generating high-power tunable subpicosecond pulses are presented. Two low-Q short dye cavities in cascade pumped well above threshold followed by extracavity pulse shaping in a highly saturated absorber and amplifiers lead to stable generation of single 500-fs pulses, i.e., a pulse-shortening factor > 104 (from a smooth 6-ns pump pulse). Output pulse energies of 500 µJ (1-GW peak power) are produced from 40-mJ pump energy and used to generate high-power tunable subpicosecond pulses from 450 to 700 nm by supercontinuum generation, spectral selection, and amplification in dye amplifiers pumped by the same Nd:YAG laser. The spectral and time processes involved in these pulse-shortening methods are discussed with a rate-equation model.
© 1992 Optical Society of America
Nguyen Dai Hung, P. Plaza, M. Martin, and Y. H. Meyer, "Generation of tunable subpicosecond pulses using low-Q dye cavities," Appl. Opt. 31, 7046-7058 (1992)