Actively Mode-Locked Fiber Lasers

M. W. Phillips; A. I. Ferguson; D. C. Hanna; M. J. McCarthy; P. J. Suni

doi:10.1117/12.963160

15 February 1990 Actively Mode-Locked Fiber Lasers

M. W. Phillips, A. I. Ferguson, D. C. Hanna, M. J. McCarthy, P. J. Suni

Proceedings Volume 1171, Fiber Laser Sources and Amplifiers; (1990) https://doi.org/10.1117/12.963160
Event: OE/FIBERS '89, 1989, Boston, United States

Abstract

We review recent investigation into the active mode-locking of rare earth doped silica, monomode fiber lasers. Dopants include Nd3+, Er3+ and Yb3+:Er3+ and mode-locking has been accomplished either by amplitude modulation or by phase modulation. Both bulk optic and integrated optic modulators have been used. Pulses of 4 psec duration have been observed in an Er3+-doped fiber laser with an integrated amplitude modulator. 20 psec pulses have been produced from a Nd3-doped fiber laser with a bulk phase modulator. In both these systems, the introduction of anomalous group velocity dispersion compensates for self-phase modulation, resulting in bandwidth-limited operation. The paper concentrates mainly on three experiments involving the mode-locking of fiber lasers by active phase modulation. A bulk LiNb03 phase modulator produces pulses of 20 psec and 37 psec respectively in Nd3-doped and Yb3:Er3-doped fiber lasers. The third system incorporates intra-fiber phase modulation. This allows considerable simplification of the laser cavity, resulting in a diode-pumpable source of 80 psec mode-locked pulses with a threshold pump power of 520 pW and a slope efficiency of 48%.

Citation Download Citation

M. W. Phillips, A. I. Ferguson, D. C. Hanna, M. J. McCarthy, and P. J. Suni "Actively Mode-Locked Fiber Lasers", Proc. SPIE 1171, Fiber Laser Sources and Amplifiers, (15 February 1990); https://doi.org/10.1117/12.963160

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