A Nd3+-doped fiber laser has been FM mode-locked by two means: 20-ps pulses were obtained with a bulk phase modulator. Detuning the modulation frequency induced FM operation which broadened the laser bandwidth to 57 GHz. An integrated fiber phase modulator produced 80-ps pulses. Low Intracavity losses led to submilliwatt thresholds and slope efficiencies in excess of 45%. (12 min)

© 1989 Optical Society of America

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