Quantitatively evaluating impact of large optics in the stretcher on compressed pulse contrast (Conference Presentation)

2019 ◽  
Author(s):  
Yunxin Tang ◽  
David Egan ◽  
Chris Hooker ◽  
Chris Gregory ◽  
Oleg Chekhlov ◽  
...  
Keyword(s):  
Pulse Contrast

Pulse contrast improvement for chirped pulse amplification lasers by spectro-temporal filtering

2015 ◽  
Vol 62 (7) ◽  
pp. 576-580
Author(s):  
Xianglin Wang ◽  
Yishan Wang ◽  
Xiaohong Hu ◽  
Yuanshan Liu ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Temporal Filtering ◽  
Chirped Pulse ◽  
Pulse Amplification ◽  
Chirped Pulse Amplification ◽  
Pulse Contrast

scholarly journals Surface-reflection-initiated pulse-contrast degradation in an optical parametric chirped-pulse amplifier

2013 ◽  
Vol 21 (13) ◽  
pp. 15580 ◽  
Author(s):  
Jing Wang ◽  
Peng Yuan ◽  
Jingui Ma ◽  
Yongzhi Wang ◽  
Guoqiang Xie ◽  
...  
Keyword(s):  
Chirped Pulse ◽  
Surface Reflection ◽  
Optical Parametric ◽  
Pulse Amplifier ◽  
Pulse Contrast

scholarly journals Pedestal cleaning for high laser pulse contrast ratio with a 100 TW class laser system

2011 ◽  
Vol 19 (9) ◽  
pp. 8486 ◽  
Author(s):  
S. Fourmaux ◽  
S. Payeur ◽  
S. Buffechoux ◽  
P. Lassonde ◽  
C. St-Pierre ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Laser System ◽  
Contrast Ratio ◽  
High Laser ◽  
Pulse Contrast

Single-Shot Pulse-Contrast Measurement for High-Intensity Lasers

2013 ◽  
Vol 50 (8) ◽  
pp. 080008
Author(s):  
马金贵 Ma Jingui ◽  
王永志 Wang Yongzhi ◽  
袁鹏 Yuan Peng ◽  
王静 Wang Jing ◽  
朱鹤元 Zhu Heyuan ◽  
...  
Keyword(s):  
High Intensity ◽  
Single Shot ◽  
Contrast Measurement ◽  
Pulse Contrast

Fiber-array-based detection scheme for single-shot pulse contrast characterization

2008 ◽  
Vol 33 (17) ◽  
pp. 1969 ◽  
Author(s):  
Dongfang Zhang ◽  
Liejia Qian ◽  
Peng Yuan ◽  
Heyuan Zhu ◽  
Shuangchun Wen ◽  
...  
Keyword(s):  
Single Shot ◽  
Fiber Array ◽  
Detection Scheme ◽  
Pulse Contrast

scholarly journals Non-adiabatic cluster expansion after ultrashort laser interaction

2008 ◽  
Vol 26 (1) ◽  
pp. 69-82 ◽  
Author(s):  
A.Ya. Faenov ◽  
A.I. Magunov ◽  
T.A. Pikuz ◽  
I.Yu. Skobelev ◽  
D. Giulietti ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Cluster Expansion ◽  
Plasma Electron ◽  
Laser Interaction ◽  
Homogeneous Plasma ◽  
X Ray ◽  
Rydberg Transitions ◽  
Ultrashort Laser ◽  
Pulse Contrast ◽  
Plasma Electron Density

AbstractWe used X-ray spectroscopy as a diagnostic tool for investigating the properties of laser-cluster interactions at the stage in which non-adiabatic cluster expansion takes place and a quasi-homogeneous plasma is produced. The experiment was carried out with a 10 TW, 65 fs Ti:Sa laser focused on CO2 cluster jets. The effect of different laser-pulse contrast ratios and cluster concentrations was investigated. The X-ray emission associated to the Rydberg transitions allowed us to retrieve, through the density and temperature of the emitting plasma, the time after the beginning of the interaction at which the emission occurred. The comparison of this value with the estimated time for the “homogeneous” plasma formation shows that the degree of adiabaticity depends on both the cluster concentration and the pulse contrast. Interferometric measurements support the X-ray data concerning the plasma electron density.

scholarly journals Single-shot cross-correlator for pulse-contrast characterization of high peak-power lasers

2018 ◽  
Vol 6 ◽  
Author(s):  
Jingui Ma ◽  
Peng Yuan ◽  
Jing Wang ◽  
Guoqiang Xie ◽  
Heyuan Zhu ◽  
...  
Keyword(s):  
Real Time ◽  
Peak Power ◽  
Dynamic Range ◽  
High Dynamic Range ◽  
System Optimization ◽  
High Peak ◽  
High Peak Power ◽  
Single Shot ◽  
High Dynamic ◽  
Pulse Contrast

Pulse contrast is a crucial parameter of high peak-power lasers since the prepulse noise may disturb laser–plasma interactions. Contrast measurement is thus a prerequisite to tackle the contrast challenge in high peak-power lasers. This paper presents the progress review of single-shot cross-correlator (SSCC) for real-time contrast characterization. We begin with the key technologies that enable an SSCC to simultaneously possess high dynamic range ($10^{10}$), large temporal window (50–70 ps) and high fidelity. We also summarize the instrumentation of SSCC prototypes and their applications on five sets of petawatt laser facilities in China. Finally, we discuss how to extend contrast measurements from time domain to spatiotemporal domain. Real-time and high-dynamic-range contrast measurements, provided by SSCC, can not only characterize various complex noises in high peak-power lasers but also guide the system optimization.

Measurement of femtosecond pulse contrast of low-repetition-rate lasers by optical Kerr effect

2014 ◽  
Vol 23 (03) ◽  
pp. 1450031 ◽  
Author(s):  
Dengke Wu ◽  
Junfang He ◽  
Changjun Zhu ◽  
Yishan Wang ◽  
Wei Zhao
Keyword(s):  
Repetition Rate ◽  
Kerr Effect ◽  
Dynamic Range ◽  
Femtosecond Lasers ◽  
Wide Spectrum ◽  
Sampling Interval ◽  
Temporal Sampling ◽  
Optical Kerr Gate ◽  
Scanning Range ◽  
Pulse Contrast

In this paper, pulse contrast was measured for femtosecond lasers with low-repetition-rate (40 Hz) using optical Kerr gate as a sampler. The results show that, without attenuator, dynamic range as high as 104 was achieved, with a scanning range of 126 ps and a temporal sampling interval of 6.3 fs. Moreover, the method suits for measuring laser pulse contrast in wide spectrum range.

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