摘要
以钛宝石飞秒振荡源作为种子源,在二级放大器中,采用种子光被同一束抽运光在有效非线性系数最大的平面内放大两次的双通光参量放大结构,实现高增益光参量啁啾脉冲放大.实验得到了3×107的总增益,信号光输出能量为3mJ,能量晃动小于3%rms,此时参量荧光仅占输出总能量的1%.实验结果表明,采用这种放大系统,提高了信号光与抽运光在时域上的匹配,有效地抑制了参量放大过程中参量荧光的产生,同时提高了系统的稳定性.
A double-pass noncollinear optical parametric chirped pulse amplifier based on an Ti ： sapphire femtoscond oscillator has been demonstrated. The signal is double-pass amplified in the second nonlinear crystal by a long pump pulse,in which the signal and pump pulses of each pass are complete phase matched in the plane with the maximum of the effective nonlinearity. Net saturated gain of 3 × 10^7 with rms fluctuations of less than 3% is achieved and the superfluorescence is suppressed less than 1% of the total output pulse energy. By this scheme, the temporal overlap between the signal and pump are improved, the conversion efficiency increased,and superfluorescence is deduced and the energy stability is enhanced.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2007年第12期2231-2234,共4页
Acta Photonica Sinica
基金
国家自然科学基金(60408002
60678013
60537060)
陕西自然科学基金(2004F02)资助
关键词
激光放大器
参量振荡器与放大器
超快激光
超快技术
Laser amplifiers
Parametric oscillators and amplifiers
Ultrafast lasers, Ultrafast technology
