The Study On Supercontinuum Generation By Pumping With Picosecond-pulses

Supercontinuum source has a wide application prospect in the biology, medical andmilitary technology. Over the past decade, supercontinuum generation by pumping withfemtosecond, picosecond, nanosecond pulses and Continue-wave have been a researchhotspot. Picosecond pulses would be an ideal pump source of high powersurpercontinuum source, since it keeps either high pulse peak power or high outputpower. In this paper, based on picosecond pulse fiber laser, supercontinuum generationby pumping with picosecond pulses is studied numerically and experimentally. Its maincontents include1. The physical model of Akhmediev Breather has been theoretically investigated.It’s numerical simulated that the characteristics of pulse compression caused bymodulation instability when pulses propagate in nonlinear fiber could bepredicted accurately by Akhmediev Breather theory.2. A Low repetition rate all-normal-dispersion pulse fiber laser has beendemonstrated. The pulse spectrum presents the best agreement with theparabolic profile, which is predicted to be an amplifier-similaritons. There is noreport that an all-normal-dispersion harmonic mode locked fiber laser withline-cavity output amplifier-similaritons on domestic and overseas.3. A110W picosecond all fiber MOPA laser have been demonstrated. Totaloptical conversion efficiency is63.2%. the laser achieve the best level of SRSand ASE compression in the hectowatt picosecond pulse fiber lasers ondomestic and overseas.4. Supercontinuum generation by pumping photonic crystal fiber (PCF) withpicosecond pulses have been investigated experimentally. We observed andanalyzed Supercontinuum generation by pumping PCF with different pulsepeak power. Based on four-wave-mixing effect, Surpercontinuum generation bypumping cascaded PCF with picosecond pulses have been well studiedtheoretically numerically and experimentally. The experimental results presentan agreement with numerical simulation. The output spectrum ofsupercontinuum generation covers the wavelength range from0.42mtobeyond1.7m.