CW-pumped polarization-maintaining Brillouin fiber ring laser: II. Active mode-locking by phase modulationReportar como inadecuado




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* Corresponding author 1 LPMC - Laboratoire de physique de la matière condensée

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 lm, 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 modu- lation. Simulations carried out through the coherent three-wave model are in very good agreement for both mode-lock- ing 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.





Autor: Jean Botineau - Gérard Cheval - Carlos Montes -

Fuente: https://hal.archives-ouvertes.fr/



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