Suret P, Joly N Y, Mélin G, Randoux S
Laboratoire de Physique des Lasers, Atomes et Molécules, UMR CNRS 8523, Centre d'Etudes et de Recherches Lasers et Applications, Université des Sciences et Technologies de Lille, F-59655 Villeneuve d'Ascq, France.
Opt Express. 2008 Jul 21;16(15):11237-46. doi: 10.1364/oe.16.011237.
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].
我们报告了在输出两个斯托克斯分量的级联拉曼光纤激光器中对输出功率自振荡的观测结果。我们的级联拉曼光纤激光器由高非线性光子晶体光纤制成，并且在由光纤端面的弱菲涅耳反射形成的法布里 - 珀罗腔内振荡。通过我们的实验和理论研究，我们确定受激拉曼散射是法布里 - 珀罗腔内出现不稳定行为的主要物理效应。因此发现激光不稳定的机制与先前确定的导致传统单级拉曼光纤激光器不稳定行为的偏振机制有很大不同。 [14, 15]
