1 毫焦脉冲从掺镱光纤放大器中输出。

1 mJ pulse bursts from a Yb-doped fiber amplifier.

机构信息

Department of Physics, Bilkent University, Cankaya, Ankara 06800, Turkey.

出版信息

Opt Lett. 2012 Jul 1;37(13):2586-8. doi: 10.1364/OL.37.002586.

DOI:10.1364/OL.37.002586

Abstract

We demonstrate burst-mode operation of a polarization-maintaining Yb-doped fiber amplifier capable of generating 60 μJ pulses within bursts of 11 pulses with extremely uniform energy distribution facilitated by a novel feedback mechanism shaping the seed of the burst-mode amplifier. The burst energy can be scaled up to 1 mJ, comprising 25 pulses with 40 μJ average individual energy. The amplifier is synchronously pulse pumped to minimize amplified spontaneous emission between the bursts. Pulse propagation is entirely in fiber and fiber-integrated components until the grating compressor, which allows for highly robust operation. The burst repetition rate is set to 1 kHz and spacing between individual pulses is 10 ns. The 40 μJ pulses are externally compressible to a full width at half-maximum of 600 fs. However, due to the substantial pedestal of the compressed pulses, the effective pulse duration is longer, estimated to be 1.2 ps.

摘要

我们演示了一种偏振保持掺镱光纤放大器的突发模式操作，该放大器能够在 11 个脉冲的突发中产生 60 μJ 的脉冲，通过一种新颖的反馈机制来实现极其均匀的能量分布，该机制对突发模式放大器的种子进行了整形。突发能量可以扩展到 1 mJ，包括 25 个平均每个脉冲能量为 40 μJ 的脉冲。放大器采用同步脉冲泵浦，以最小化突发之间的放大自发辐射。脉冲传播完全在光纤和光纤集成组件中进行，直到光栅压缩器，这允许进行高度可靠的操作。突发重复率设置为 1 kHz，脉冲之间的间隔为 10 ns。40 μJ 的脉冲可以外部压缩到半最大值全宽为 600 fs。然而，由于压缩脉冲的显著基座，有效脉冲持续时间更长，估计为 1.2 ps。