Abstract
A fiber Raman laser generating a subnanosecond pulse in the extremely broad spectral region between 0.6 and 1.8 μm has been developed using an ultra-low-loss single-mode fiber as the generating medium, pumped by a high-power mode-locked and Q-switched Nd:YAG laser at λ = 1.06 μm. The fiber length dependence of the Raman emission is investigated by varying the generating fiber length from several meters to ∼1 km. As a result, pulses with 3-dB widths <0.4 nsec are obtained in the 1.0–1.7-μm spectral region by using an ∼200-m long generating fiber with a pump peak power of 0.4 kW. Timing jitter occurring in the displayed pulse train on an oscilloscope is reduced to ±0.02 nsec with the newly constructed delay system.
© 1981 Optical Society of America
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