David Méchin - Academia.edu (original) (raw)
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Papers by David Méchin
Journal of the Optical Society of America B, 2007
We present numerical and analytical results that confirm that similariton pulses can be compresse... more We present numerical and analytical results that confirm that similariton pulses can be compressed by 2 orders of magnitude in a dispersion-decreasing Raman-pumped fiber amplifier yielding pulses as short as 120 fs. Physical conditions have been derived, subject to which, higher-order nonlinearities and dispersion terms do not affect the shape and slope of the linear chirped sech pulse, although they shift the similariton amplitude in time and downshift it in mean frequency. The developed analytical theory is in good agreement with numerical simulations. This predicted similariton regime with an optimized fiber amplifier and input pulse may, find important applications in optical pulse compression.
Optics Express, 2010
We report here the first demonstration of a mode-locked fiber laser delivering parabolic pulses (... more We report here the first demonstration of a mode-locked fiber laser delivering parabolic pulses (similaritons) at 1534 nm. The use of a Raman-based gain medium potentially allows its implementation at any wavelength. The 22nJ output similariton pulses have a true parabolic shape both in the time and spectral domains and a linear chirp. Linear recompression close to Fourier limit is demonstrated allowing us to obtain 6 ps compressed pulses with a compression factor of 75.
Journal of the Optical Society of America B, 2007
We present numerical and analytical results that confirm that similariton pulses can be compresse... more We present numerical and analytical results that confirm that similariton pulses can be compressed by 2 orders of magnitude in a dispersion-decreasing Raman-pumped fiber amplifier yielding pulses as short as 120 fs. Physical conditions have been derived, subject to which, higher-order nonlinearities and dispersion terms do not affect the shape and slope of the linear chirped sech pulse, although they shift the similariton amplitude in time and downshift it in mean frequency. The developed analytical theory is in good agreement with numerical simulations. This predicted similariton regime with an optimized fiber amplifier and input pulse may, find important applications in optical pulse compression.
Optics Express, 2010
We report here the first demonstration of a mode-locked fiber laser delivering parabolic pulses (... more We report here the first demonstration of a mode-locked fiber laser delivering parabolic pulses (similaritons) at 1534 nm. The use of a Raman-based gain medium potentially allows its implementation at any wavelength. The 22nJ output similariton pulses have a true parabolic shape both in the time and spectral domains and a linear chirp. Linear recompression close to Fourier limit is demonstrated allowing us to obtain 6 ps compressed pulses with a compression factor of 75.