Gamma-shaped long-cavity normal-dispersion mode-locked Er-fiber laser for sub-nanosecond high-energy pulsed generation

Nyushkov, B.N., Denisov, V.I., Pivtsov, V.S., Ivanenko, Aleksey V., Kobtsev, S.M., Turitsyn, Sergei K., Mou, Chengbo and Zhang, Lin (2012). Gamma-shaped long-cavity normal-dispersion mode-locked Er-fiber laser for sub-nanosecond high-energy pulsed generation. Laser physics letters, 9 (1), pp. 59-67.

Abstract

We propose the design of a novel ?-shaped fiber laser resonator and apply it to build a long-cavity normaldispersion mode-locked Er-fiber laser which features enhanced functionalities for management and optimization of pulsed lasing regimes. We report the generation of sub-nanosecond pulses with the energy of ~0.5 µJ at a kilohertz-scale repetition rate in an all-fiber system based on the new laser design. A combination of special design solutions in the laser, such as polarization instability compensation in the ultra-long arm of the resonator, intra-cavity spectral selection of radiation with a broadband fiber Bragg grating, and polarization selection by means of a tilted refractive index grating, ensures low amplified spontaneous emission (ASE) noise and high stability of the laser system output parameters.

Divisions: Engineering & Applied Sciences > Electrical, electronic & power engineering
Additional Information: Copyright 2011 Elsevier B.V., All rights reserved.
Uncontrolled Keywords: mode-locked fiber laser, gamma cavity, normal dispersion, tilted fiber grating, sub-nanosecond pulses, low repetition rate, high pulse energy, ASE suppression, double-pass fiber amplifier
Published Date: 2012-01
Authors: Nyushkov, B.N.
Denisov, V.I.
Pivtsov, V.S.
Ivanenko, Aleksey V.
Kobtsev, S.M.
Turitsyn, Sergei K.
Mou, Chengbo
Zhang, Lin

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