scholarly journals Measurement of amplified binary-modulated chirped laser pulses generated by different acousto-optic pulse shaping algorithms

2020 ◽  
Author(s):  
Vladimir Molchanov ◽  
Konstantin Yushkov ◽  
Pavel Kostryukov ◽  
Petr Gornostaev ◽  
Nikolay Vorobiev
Keyword(s):  
Pulse Shaping ◽  
Delay Line ◽  
Ultrafast Optics ◽  
Laser System ◽  
Laser Pulses ◽  
Fourier Synthesis ◽  
Pulse Front ◽  
Regenerative Amplifier ◽  
Front Duration ◽  
Chirped Pulse Amplification

The paper belongs to the field of ultrafast optics. Acousto-optic pulse shaping has been studied experimentally for binary intensity modulation in a chirped pulse amplification laser system. Direct time-domain measurement of pulse front duration with a picosecond streak camera was performed for a Ti:sapphire regenerative amplifier. It was discovered that the sign of the second order dispersion produced by the acousto-optic dispersion delay line affects the modulation rise/fall time. Two algorithms for synthesis of ultrasonic waveforms for feeding the delay line, dispersive Fourier synthesis and the Gerchberg-Saxton algorithm, were compared. Minimum pulse front duration of 3.6 ps for 3 mJ pulses with the linear chirp of 6.2 ps/nm at the wavelength of 795 nm was obtained.

scholarly journals Measurement of amplified binary-modulated chirped laser pulses generated by different acousto-optic pulse shaping algorithms

2020 ◽  
Author(s):  
Vladimir Molchanov ◽  
Konstantin Yushkov ◽  
Pavel Kostryukov ◽  
Petr Gornostaev ◽  
Nikolay Vorobiev
Keyword(s):  
Pulse Shaping ◽  
Delay Line ◽  
Ultrafast Optics ◽  
Laser System ◽  
Laser Pulses ◽  
Fourier Synthesis ◽  
Pulse Front ◽  
Regenerative Amplifier ◽  
Front Duration ◽  
Chirped Pulse Amplification

The paper belongs to the field of ultrafast optics. Acousto-optic pulse shaping has been studied experimentally for binary intensity modulation in a chirped pulse amplification laser system. Direct time-domain measurement of pulse front duration with a picosecond streak camera was performed for a Ti:sapphire regenerative amplifier. It was discovered that the sign of the second order dispersion produced by the acousto-optic dispersion delay line affects the modulation rise/fall time. Two algorithms for synthesis of ultrasonic waveforms for feeding the delay line, dispersive Fourier synthesis and the Gerchberg-Saxton algorithm, were compared. Minimum pulse front duration of 3.6 ps for 3 mJ pulses with the linear chirp of 6.2 ps/nm at the wavelength of 795 nm was obtained.

scholarly journals A Yb:KGW dual-crystal regenerative amplifier

2020 ◽  
Vol 8 ◽  
Author(s):  
Huijun He ◽  
Jun Yu ◽  
Wentao Zhu ◽  
Xiaoyang Guo ◽  
Cangtao Zhou ◽  
...  
Keyword(s):  
Laser System ◽  
Regenerative Amplifier ◽  
Chirped Pulse ◽  
Pulse Amplification ◽  
Front End ◽  
Chirped Pulse Amplification ◽  
Gain Narrowing ◽  
Diode Pumped ◽  
Cavity Design ◽  
Output Laser

Abstract This study develops a Yb:KGW dual-crystal based regenerative amplifier. The thermal lensing and gain-narrowing effects are compensated by the dual-crystal configuration. Sub-nanojoule pulses are amplified to 1.5 mJ with 9 nm spectral bandwidth and 1 kHz repetition rate using chirped pulse amplification technology. Consequently, 1.2 mJ pulses with a pulse duration of 227 fs are obtained after compression. Thanks to the cavity design, the output laser was a near diffraction limited beam with M2 around 1.1. The amplifier has the potential to boost energy above 2 mJ after compression and act as a front end for a future kilohertz terawatt-class diode-pumped Yb:KGW laser system.

scholarly journals The all-diode-pumped laser system POLARIS – an experimentalist’s tool generating ultra-high contrast pulses with high energy

2014 ◽  
Vol 2 ◽  
Author(s):  
Marco Hornung ◽  
Hartmut Liebetrau ◽  
Andreas Seidel ◽  
Sebastian Keppler ◽  
Alexander Kessler ◽  
...  
Keyword(s):  
Laser System ◽  
Laser Pulses ◽  
High Energy ◽  
Current Status ◽  
Temporal Contrast ◽  
Chirped Pulse ◽  
Chirped Pulse Amplification ◽  
Diode Pumped ◽  
Generation Pulse ◽  
Scientific Tool

Abstract The development, the underlying technology and the current status of the fully diode-pumped solid-state laser system POLARIS is reviewed. Currently, the POLARIS system delivers 4 J energy, 144 fs long laser pulses with an ultra-high temporal contrast of $\def \xmlpi #1{}\def \mathsfbi #1{\boldsymbol {\mathsf {#1}}}\let \le =\leqslant \let \leq =\leqslant \let \ge =\geqslant \let \geq =\geqslant \def \Pr {\mathit {Pr}}\def \Fr {\mathit {Fr}}\def \Rey {\mathit {Re}}5\times 10^{12}$ for the ASE, which is achieved using a so-called double chirped-pulse amplification scheme and cross-polarized wave generation pulse cleaning. By tightly focusing, the peak intensity exceeds $3.5\times 10^{20}\ \mathrm{W\ cm}^{-2}$ . These parameters predestine POLARIS as a scientific tool well suited for sophisticated experiments, as exemplified by presenting measurements of accelerated proton energies. Recently, an additional amplifier has been added to the laser chain. In the ramp-up phase, pulses from this amplifier are not yet compressed and have not yet reached the anticipated energy. Nevertheless, an output energy of $16.6\ \mathrm{J}$ has been achieved so far.

Spectral pulse shaping of a 5  Hz, multi-joule, broadband optical parametric chirped pulse amplification frontend for a 10  PW laser system

2018 ◽  
Vol 43 (16) ◽  
pp. 3866 ◽  
Author(s):  
František Batysta ◽  
Roman Antipenkov ◽  
Teddy Borger ◽  
April Kissinger ◽  
Jonathan T. Green ◽  
...  
Keyword(s):  
Pulse Shaping ◽  
Laser System ◽  
Chirped Pulse ◽  
Pulse Amplification ◽  
Optical Parametric ◽  
Chirped Pulse Amplification

scholarly journals Innovative single-shot 2D pulse front tilt diagnostic

2021 ◽  
Vol 9 ◽  
Author(s):  
M. Galimberti ◽  
F. G. Bisesto ◽  
M. Galletti
Keyword(s):  
Laser System ◽  
Ultrashort Pulses ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Target Area ◽  
Single Shot ◽  
Angular Dispersion ◽  
Power Laser ◽  
Pulse Front ◽  
High Power Laser System

Abstract The presence of pulse front tilt (PFT), caused by angular dispersion (AD) in femtosecond laser pulses, could degrade the performance of the laser system and/or impact the experimental yields. We present a single-shot diagnostic capable of measuring the AD in the x–y plane by adopting an intensity mask. It can be applied to stretched pulses, making it ideal for diagnosing the AD along the amplification chain of a high-power laser system, and to ultrashort pulses exiting from an optical compressor. In this way, it can help in properly characterizing a laser pulse before it is delivered to the target area. In this Letter, we present experimental evidence of AD retrieval for different compression configurations, supported by theoretical analysis.

scholarly journals Timing Fluctuation Correction of A Femtosecond Regenerative Amplifier

Crystals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1242
Author(s):  
Keyang Liu ◽  
Hongyang Li ◽  
Xinliang Wang ◽  
Yanqi Liu ◽  
Liwei Song ◽  
...  
Keyword(s):  
Laser System ◽  
Laser Pulses ◽  
Timing Jitter ◽  
Regenerative Amplifier ◽  
Sum Frequency ◽  
Long Term Stability ◽  
Reference Oscillator ◽  
Correction Scheme ◽  
Laser Facility

We report on the long-term correction of a timing fluctuation between the femtosecond regenerative amplifier and the reference oscillator for the seed 100 PW laser system in the Station of Extreme Light (SEL). The timing fluctuation was characterized by a noncollinear balanced optical cross-correlator that maps the time difference to the sum frequency intensity of the amplifier and oscillator laser pulses. A feedback loop was employed to correct the timing jitter by adjusting the time delay line in the amplifier beam path. The timing fluctuation was reduced to 1.26 fs root-mean-square from hundreds of fs over 10 hours. Benefitting from excellent performance and long-term stability, this timing jitter correction scheme, as a component of optical synchronization in the 100 PW laser facility, will be integrated into SEL.

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