Andersen T V, Schmidt O, Bruchmann C, Limpert J, Aguergaray C, Cormier E, Tünnermann A
Opt Express. 2006 May 29;14(11):4765-73. doi: 10.1364/oe.14.004765.
We report on the generation of high energy femtosecond pulses at 1 MHz repetition rate from a fiber laser pumped optical parametric amplifier (OPA). Nonlinear bandwidth enhancement in fibers provides the intrinsically synchronized signal for the parametric amplifier. We demonstrate large tunability extending from 700 nm to 1500 nm of femtosecond pulses with pulse energies as high as 1.2 muJ when the OPA is seeded by a supercontinuum generated in a photonic crystal fiber. Broadband amplification over more than 85 nm is achieved at a fixed wavelength. Subsequent compression in a prism sequence resulted in 46 fs pulses. With an average power of 0.5 W these pulses have a peak-power above 10 MW. In particular, the average power and pulse energy scalability of both involved concepts, the fiber laser and the parametric amplifier, will enable easy up-scaling to higher powers.
我们报道了从光纤激光器泵浦的光学参量放大器（OPA）产生重复频率为1MHz的高能量飞秒脉冲。光纤中的非线性带宽增强为参量放大器提供了本质上同步的信号。当OPA由光子晶体光纤中产生的超连续谱种子注入时，我们展示了飞秒脉冲从700nm到1500nm的大可调谐性，脉冲能量高达1.2μJ。在固定波长下实现了超过85nm的宽带放大。随后在棱镜序列中压缩得到了46fs的脉冲。这些脉冲平均功率为0.5W，峰值功率超过10MW。特别是，所涉及的两个概念，即光纤激光器和参量放大器的平均功率和脉冲能量可扩展性，将使向上扩展到更高功率变得容易。
