Abstract
A 200 nm supercontinuum (SC) with high flatness (< dB) was demonstrated with subpicosecond optical pulses generated by a passively mode-locked figure-eight-laser. The evolution process of SC under different optical pumping power was observed experimentally. Three sequential evolution stages were found: (1) SC spectrum is asymmetrically broadened due to self-phase modulation (SPM) and group velocity dispersion (GVD); (2) when the broadened spectrum exceeds the zero dispersion point, cross phase modulation (XPM) and four wave mixing (FWM) will cause the symmetrical spectrum broadening; (3) the stimulated Raman scattering (SRS) causes the spectrum to broaden toward the long wavelength quickly when the pumping power is intense enough.
| Original language | English |
|---|---|
| Pages (from-to) | 289-293 |
| Number of pages | 5 |
| Journal | Chinese Journal of Lasers B (English Edition) |
| Volume | B8 |
| Issue number | 3 |
| Publication status | Published - Jun 1999 |
| Externally published | Yes |