Prepulse suppression in a multi-10-TW diode-pumped Yb:glass laser

被引：18

作者：

Keppler, S. ^{[1
]}

Boedefeld, R. ^{[1
,2
]}

Hornung, M. ^{[1
,2
]}

Saevert, A. ^{[1
]}

Hein, J. ^{[1
]}

Kaluza, M. C. ^{[1
,2
]}

机构：

[1] FSU Jena, Inst Opt & Quantum Elect, D-07743 Jena, Germany

[2] Helmholtz Inst Jena, D-07743 Jena, Germany

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 2011年 / 104卷 / 01期

关键词：

CONTRAST; PULSES; GENERATION; ACCELERATION;

D O I：

10.1007/s00340-011-4633-x

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We describe a novel method to improve the temporal intensity contrast (TIC) between the main pulse and prepulses in a high-power chirped-pulse amplification (CPA) laser system. Pre- and post-pulses originating from the limited extinction ratio of the polarization gating equipment are suppressed by carefully adjusting the round-trip times of the regenerative amplifiers (RAs) with respect to the oscillator. As a result, leaking pulses from earlier or later round-trips in the RAs are hidden below the temporal shape of the main pulse. The synchronization can easily be controlled by a contrast measurement on a picosecond time scale using a third-order cross-correlator that enables a sub-mm precise adjustment of the cavity lengths. Finally, a method based on spectral interference is introduced that can be used for a fine-adjustment of the cavity lengths for the daily operation, making this new method easy to implement into existing laser systems.

引用

页码：11 / 16

页数：6

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