Self-oscillations in a cascaded Raman laser made with a highly nonlinear photonic crystal fiber
P. Suret,
N. Y. Joly,
G. Mélin,
S. Randoux
Optics Express
16
11237-11246
(2008)
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We report the observation of self-oscillations of the output power in a cascaded Raman fiber laser delivering two Stokes components. Our cascaded Raman fiber laser is made with a highly nonlinear photonic crystal fiber and it oscillates within a Perot-Fabry cavity formed by weak Fresnel reflections from the fiber ends. From our experimental and theoretical study, we identify stimulated Raman scattering as being the physical effect dominant in the emergence of unstable behaviors inside the Perot-Fabry cavity. Mechanisms of laser destabilization are thus found to be very different from polarization mechanisms previously identified as being responsible for unstable behaviors in conventional one-stage Raman fiber lasers [14, 15].
Anomalous pulse breakup in small-core photonic crystal fibers
A. Podlipensky,
P. Szarniak,
N. Y. Joly,
P. St. J. Russell
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
25
(12)
2049-2056
(2008)
| Journal
Detailed numerical and experimental studies of propagation of 110 fs laser pulses at 800 am in small-core photonic crystal fibers (gamma = 100 W (1) km(-1)) reveal that pulse breakup occurs in two distinct regimes defined by the input power. At low peak power (soliton order N <= g7) higher-order soliton fission occurs: individual solitons being ejected from the input pulse one after the other and are at-ranged in wavelength and in time by peak power. At higher levels of peak power (N>8), pulse breakup results in ejection of bound soliton pairs and the formation of single solitons that collide during propagation. (C) 2008 Optical Society of America
Contact
Research Group Nicolas Joly
Professor for Photonics Friedrich-Alexander-Universität Erlangen-Nürnberg
and
Max Planck Institute for the Science of Light Staudtstr. 2 91058 Erlangen, Germany
