Abstract
High-repetition-rate (HRR) short-pulse laser sources find important applications in various areas of science and technology, such as optical communications, light-matter interactions, spectroscopy and metrology. In this prospect, harmonically mode-locked fiber lasers allowing adjustable HRR are studied. Besides the active mode locking strategy, several fiber cavity architectures have been proposed to achieve adjustable HRR generation without resorting to RF electronic drivers [1-4]. They involve the imbedding of a high frequency inside the relatively long – i.e. with low fundamental repetition rate – fiber laser cavity, either using modulation instability processes [1], or/and interfering optical components with periodic spectral transfer functions, such as a Fabry-Pérot filter [1], a high-Q micro-ring resonator [2], or a Mach-Zehnder interferometer (MZI) [3,4]. A recent publication reported the realization of a tunable HRR fiber laser using a MZI, where the repetition rate could be tuned from 7 to 1100 GHz [4]. However, little information was provided about the stability of HRR regimes.
© 2015 IEEE
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