We investigate the adiabatic enhanced compression of ultrashort pulses from a distributed feedback laser operated at 1550 nm in fibres with slowly decreasing dispersion (FSDD). High-quality pulse compressions from 4.4...We investigate the adiabatic enhanced compression of ultrashort pulses from a distributed feedback laser operated at 1550 nm in fibres with slowly decreasing dispersion (FSDD). High-quality pulse compressions from 4.4 ps down to 1.1ps in a l00m FSDD and from 4.4ps down to 830fs in a 500m FSDD are obtained. The Raman self frequency shift of femtosecond pulses in the compression is observed. Theoretical analyses are in good agreement with experimental results.展开更多
A new region where modulation stability occurs in the fibers with minimum group-velocity was found due to the fourth-order dispersion effect.The spectral extent of the region is analyzed and found to be affected by in...A new region where modulation stability occurs in the fibers with minimum group-velocity was found due to the fourth-order dispersion effect.The spectral extent of the region is analyzed and found to be affected by initial input power and the dispersion parameter.展开更多
Chirped gratings with uniform Kerr nonlinearity are numerically demons traced to have direction-dependent switching behavior,which is caused by the different energy storage between the two incident directions.This eff...Chirped gratings with uniform Kerr nonlinearity are numerically demons traced to have direction-dependent switching behavior,which is caused by the different energy storage between the two incident directions.This effect can iind useful applications such as optical diode and optical switch-isolator.展开更多
基金Supported by the Natural Science Foundation of the Guangdong Education Department(200019)the Natural Science Foundation of Guangdong Province(980030).
文摘We investigate the adiabatic enhanced compression of ultrashort pulses from a distributed feedback laser operated at 1550 nm in fibres with slowly decreasing dispersion (FSDD). High-quality pulse compressions from 4.4 ps down to 1.1ps in a l00m FSDD and from 4.4ps down to 830fs in a 500m FSDD are obtained. The Raman self frequency shift of femtosecond pulses in the compression is observed. Theoretical analyses are in good agreement with experimental results.
基金Supported by the National“Climb”Program,and Natural Science Foundation of Guangdong Province。
文摘A new region where modulation stability occurs in the fibers with minimum group-velocity was found due to the fourth-order dispersion effect.The spectral extent of the region is analyzed and found to be affected by initial input power and the dispersion parameter.
文摘Chirped gratings with uniform Kerr nonlinearity are numerically demons traced to have direction-dependent switching behavior,which is caused by the different energy storage between the two incident directions.This effect can iind useful applications such as optical diode and optical switch-isolator.