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Amplified erbium-fiber-laser pulses compressed in large-mode-area fiber show significantly reduced nonlinearity compared to standard-single-mode fiber. Consequently, supercontinuum generated with the pulses compressed in large-mode-area fiber show a 10 dB increase in cross-coherence fringe visibility.
Carrier envelope phase locking of a frequency comb based on an in-line low-noise Er fiber system is demonstrated. The repetition rate and the carrier envelope offset frequency are locked by two phase locked loops over several hours.
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