Abstract
Continuous wave (cw) and Q-switched fiber lasers were implemented using highly doped erbium fiber pumped with a 980-nm pigtailed laser diode. Thresholds and slope efficiencies were characterized for various reflector combinations to achieve optimal cw operation. An output coupling of 90% was found to produce maximum output power of 30 mW at 1560 nm with 78 mW of launched pump power. Pulsed operation was achieved with low loss on the first diffracted order of a bulk acousto-optic Q-switch. Output coupling from the fiber laser was obtained through an intrinsic fiber grating. Available pump power levels of 78 mW produced 20-ns pulses of 250 W peak power and a repetition rate of up to 3.5 kHz. The effects of repetition rate, cavity losses and pump power on the pulsewidth, peak power and lasing spectrum were characterized.© (1994) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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