Xu L, Fu Q, Liang S, Shepherd D P, Richardson D J, Alam S-U
Opt Lett. 2017 Oct 1;42(19):4036-4039. doi: 10.1364/OL.42.004036.
We report a high-peak-power, picosecond, mid-infrared optical parametric generator (OPG) and optical parametric amplifier (OPA) based on orientation-patterned gallium arsenide pumped by a thulium:fiber master-oscillator-power-amplifier employing direct diode-seeded amplification. An OPG tuning range of 2550-2940 nm (signal) and 5800-8300 nm (idler) is demonstrated with peak powers as high as 3 (signal) and 2 kW (idler), and with pulse energies of 0.26 and 0.16 μJ, respectively. When seeded with a 0.6 cm linewidth tunable Cr:ZnSe laser, the OPA idler linewidth is narrowed to 1.4 cm and a small-signal parametric gain of 60 dB is achieved. A maximum peak power of 13.3 (signal) and 3.2 kW (idler) is obtained at an overall conversion efficiency of 36%. The corresponding maximum pulse energies for the signal and idler are 1.07 and 0.26 μJ, respectively.
我们报道了一种基于取向图案化砷化镓的高峰值功率皮秒中红外光学参量发生器（OPG）和光学参量放大器（OPA），其由采用直接二极管种子放大的铥光纤主振荡器功率放大器泵浦。展示了OPG的调谐范围为2550 - 2940纳米（信号）和5800 - 8300纳米（闲频光），峰值功率分别高达3千瓦（信号）和2千瓦（闲频光），脉冲能量分别为0.26和0.16微焦。当用线宽为0.6厘米的可调谐Cr:ZnSe激光器作为种子源时，OPA闲频光的线宽缩小到1.4厘米，实现了60分贝的小信号参量增益。在总转换效率为36%时，获得了13.3千瓦（信号）和3.2千瓦（闲频光）的最大峰值功率。信号和闲频光相应的最大脉冲能量分别为1.07和0.26微焦。
