Journal
OPTICS EXPRESS
Volume 18, Issue 26, Pages 27445-27454Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.18.027445
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Funding
- Agence Nationale de la Recherche [ANR-09-BLAN-0065]
- Ministry of Higher Education and Research
- Nord-Pas de Calais Regional Council
- FEDER through the Contrat de Projets Etat Region (CPER)
- Agence Nationale de la Recherche (ANR) [ANR-09-BLAN-0065] Funding Source: Agence Nationale de la Recherche (ANR)
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Long-pulse supercontinuum sources are initiated by modulation instability and consequently suffer from stochastic shot-to-shot variations of their spectral power density. In this paper, we provide a measurement of pulse-to-pulse fluctuations over the whole supercontinuum spectrum, and we show that their spectral dependence follows the group index curve of the fiber. Then, we demonstrate a significant reduction of supercontinuum pulse-to-pulse fluctuations in the visible by using a photonic crystal fiber with longitudinally tailored guidance properties. We finally show numerically that this new source would allow a significant improvement of the signal-to-noise ratio in fluorescence microscopy. (C) 2010 Optical Society of America
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