Abstract
Abstract Tunable near-i.r. laser pulses with a duration of 250–500 ps and a spectral bandwidth of 0·1 A in the range of 733–807 nm were generated by a long cavity grazing incidence dye laser. The pulse duration depends on the cavity length and the feedback from both the front and the back reflectors. The main output pulse is accompanied by a pre-pulse and/or a post-pulse depending on the cavity configuration and length. The experimental results are in agreement with the theoretical calculations of Uchiki et al. With the introduction of an intracavity lens, it is possible to achieve long cavity lengths maintaining low losses. This way, the problem of single-pulse generation is solved, eliminating the pre- and post-pulses.
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