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Employing polymethine dyes as saturable absorbers and intracavity Fabry-Perot interferometers, a flashlamp-pumped cresyl-violet dye laser has been mode locked to produce picosecond pulses (3–5 psec) frequency tunable from 644 to 704 nm. The frequency tuning ranges of mode-locked rhodamine 6G and rhodamine B dye lasers have also been extended to cover 584 to 645 nm.
Arthurs et al. (Tue,) studied this question.