Passive mode locking of a long pulse XeCl laser

Abstract
Passive mode locking has been achieved in a XeCl laser with the gain duration over 150 ns. The saturation characteristics of absorber dyes including BBQ, BPBD, and PTP were measured, resulting in the lowest saturation intensity of BBQ. The almost 100% modulated train of 12 pulses was achieved with the rapid pulse sharpening to the duration of ∼2 ns, when BBQ was used as a saturable absorber.

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