Ultra-Broadband Coherent Supercontinuum Frequency Comb

Details Ultra-Broadband Coherent Supercontinuum Frequency Comb Ultra-Broadband Coherent Supercontinuum Frequency Comb

2011-05-11

arxiv.org/abs/1105.2093v1

Phys. Rev. A 84, 011806 (2011)

Physics

Optics

5 pages, 3 figures

Scientific paper

10.1103/PhysRevA.84.011806

We present detailed studies of the coherence properties of an ultra-broadband super-continuum, enabled by a new approach involving continuous wave laser sources to independently probe both the amplitude and phase noise quadratures across the entire spectrum. The continuum coherently spans more than 1.5 octaves, supporting Hz-level comparison of ultrastable lasers at 698 nm and 1.54 {\mu}m. We present the first numerical simulation of the accumulated comb coherence in the limit of many pulses, in contrast to the single-pulse level, with systematic experimental verification. The experiment and numerical simulations reveal the presence of quantum-seeded broadband amplitude noise without phase coherence degradation, including the discovery of a dependence of the super-continuum coherence on the fiber fractional Raman gain.

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