Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5025775 | Optik - International Journal for Light and Electron Optics | 2017 | 7 Pages |
We proposed and demonstrated a few-cycle pulse generation from compression of supercontinuum (SC) pulse by using a simple grating pair compressor. An all-normal dispersion photonic crystal fiber (ANDi-PCF) with nearly zero flattened dispersion at 1550Â nm was chosen to generate a highly coherent SC. In such a fiber a highly coherent broadband SC with 20-dB wavelength from 1107Â nm to 2551Â nm is generated. It is found that the mechanism of spectral broadening is mainly dominated by self-phase modulation which results in the highly coherent SC generation. By using a grating pair compressor, an approximately 1.6-cycle pulse (8.4Â fs) but only with compression quality of 56.55% can be obtained from compression of the highly coherent SC optical pulse. By optimizing the initial chirp of the pump pulse, we have successfully compressed the SC pulse to less than 10Â fs with compression quality as high as 95.4%.