Temporal Shaping of High Peak Power Pulse Trains from a Burst-Mode Laser System

Applied Sciences

Joachim Hein¹  Jörg Körner¹  Malte C. Kaluza¹  Jürgen Reiter¹ 

[1] Institute of Optics and Quantum Electronics, Friedrich-Schiller-University Jena, Max-Wien-Platz 1, Jena 07743, Germany;

关键词: burst;    Pockels cell;    temporal shaping;    Ytterbium;    diode pumped;    solid-state laser;    cryogenically cooled;    Yb:CaF2;    femtosecond laser;   

DOI  :  10.3390/app5041790

来源: DOAJ

【 摘 要 】

It has been shown in the past that pulsed laser systems operating in the so-called “burst mode” are a beneficial approach to generate high peak power laser pulses at high repetition rates suitable for various applications. So far, most high-energy burst-mode laser systems put great effort into generating a homogeneous energy distribution across the burst duration, e.g., by shaping the pump pulse. In this work, we present a new shaping technique, which is able to produce arbitrary energy distributions within the burst by pre-shaping the seed pulse burst with a Pockels cell. Furthermore, this technique allows for the precompensation of any static modulations across the burst, which may be introduced during the subsequent amplification process. Therefore, a pulse burst with a uniform energy distribution can also be generated. The method is tested with an ultra-short pulse burst mode laser amplifier system producing bursts of a 1 ms duration with a pulse repetition rate of 1 MHz and a maximum output power of 800 W during the burst. Furthermore, a method to predict the influence of the amplifier on a non-uniformly shaped burst is presented and successfully tested to produce a pre-defined pulse shape after amplification.

【 授权许可】

Unknown