Abstract
We experimentally study the chaotic behaviors in a compact all-fiber
erbium-doped fiber ring laser (ED-FRL) with an added Mach-Zehnder interferometer
(MZI) by using a phase-modulation method. A piezo-electric ceramic transducer (PZT)
is incorporated in the MZI to introduce single-frequency phase modulation. The
coexistence of intermittency and period-doubling bifurcation routes to chaos in the
EDFRL system is observed by adjusting the modulation frequency or the phase
modulation depth in the experiment. In addition, the EDFRL presents irregular
multi-longitudinal-mode oscillation with a definite linear polarization when
operating at intensity chaos state.
© 2014 Chinese Optics Letters
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