Maximization of supercontinua in photonic crystal fibers by using double pulses and polarization effects
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- Kalashnikov, V., Dombi, P., Fuji, T. et al. Appl Phys B (2003) 77: 319. doi:10.1007/s00340-003-1187-6
We show with sub-20 fs pulses both experimentally and theoretically two techniques to control the width and polarization of spectral supercontinua generated in photonic crystal fibers. The first exploits double pulses which interact inside the fiber nonelastically due to stimulated Raman scattering and thus make the supercontinuum wider, whereas the peak intensity can be kept at a reasonably moderate level to prevent fiber damage. The second approach includes polarization manipulations which allow a desirable polarization state to be obtained in a definite spectral range and the spectral shape and width to be varied.