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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.
We demonstrate a method of generating femtosecond pulses at 1350 nm by exciting Cherenkov radiation in a higher-order-mode fiber with a 1064 nm source. We measure a 134 fs, 0.66 nJ output pulse.
We demonstrate propagation and compression of 14-nJ, 152-fs pulses in the 2100-mum2 effective area, LP07 mode of an intentionally multi-moded fiber. The 12-m length of fiber was coiled to a radius of curvature of 7.5 cm.
We demonstrate a higher-order-mode fiber-based platform, to achieve low-loss, bend-resistant, mode-coupling-free light transmission over meter-length fibers, in a record Aeff of 2100 mum2. Its nonlinearity tolerance is demonstrated by compressing fiber-laser pulses to 64 fs, yielding 52-kW peak powers
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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