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Opt Lett. 1988 Apr 1;13(4):309-11.

Long-pulse generation with a stable-relaxation-oscillation Nd:YLF laser.

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Schwartz Electro-Optics, Inc., 45 Winthrop Street, Concord, Massachusetts 01742, USA.


A simple technique for long-pulse (0.2-2 microsec) generation with neodymium lasers has been demonstrated. Under the proper conditions, a normal-mode oscillator, operated in a single transverse mode, produces well-defined relaxation oscillations from which a single subpulse can be isolated for amplification. The characteristic subpulse temporal profile is ideal for saturated amplification without pulse shortening. Data are presented for a Nd:YLF system consisting of an oscillator followed by a 64-mm-long amplifier. Pulse energies in excess of 100 mJ were achieved with a small-signal gain of 630.


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