CW-pumped polarization-maintaining Brillouin fiber ring laser: II. Active mode-locking by phase modulation |
| |
Authors: | Jean Botineau |
| |
Affiliation: | Centre National de la Recherche Scientifique, Laboratoire de Physique de la Matière Condensée, Université de Nice - Sophia Antipolis, Parc Valrose, F-06108 Nice Cedex 2, France |
| |
Abstract: | Stimulated Brillouin backscattering in a cw-pumped long optical polarization-maintaining fiber ring cavity excites spontaneous stable mode-locking. But the shortest pulses allowed by the Brillouin gain bandwidth imply an active mode-locking, which we have achieved by using a phase modulator inside the ring. The experiment is carried out in the infrared at 1.319 μm, and in narrow frequency domains, close to N integer multiples of the ring FSR, we observe two type of mode-locking: either a maximum compression of the Brillouin solitons, or a stable splitting into N equally spaced pulses. Case N = 3 is more detailed. Experiment implies a slight polarization modulation by the phase modulation. Simulations carried out through the coherent three-wave model are in very good agreement for both mode-locking mechanisms. Introduction of a small amplitude modulation together with the intra-cavity phase modulation satisfactorily explains the stable splitting domain as well as the compression domain. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|