Time-resolved reflectivity measurements on a plasma mirror with few-cycle laser pulses

The reflective characteristics on ultrafast laser-irradiated solid target

“…To directly measure the improvement of the contrast for ns pre-pulse in a single shot, we used a high dynamic phototube with a time resolution of ~100 ps instead of third-order autocorrelation device (TOAD) [6]. The temporal shape of the pulse with a amplified spontaneous emission (ASE) is shown in Fig.…”

Contrast Improvement of Relativistic Few-Cycle Light Pulses

“…Some studies pursued the application possibility of the plasma mirror: improving the repetition rate by using a liquid jet as the target Backus et al (1993) and Doumy et al (2004b). All previous studies used pulses with 25 fs of duration or longer and only our investigations Nomura et al (2007) and others shown later applied sub-10-fs pulses. On the other hand, intense few-cycle pulses with a sufficiently high contrast would open up a new prospect for many applications as intense single attosecond pulse generation Tsakiris et al (2006).…”

“…Since it is used after the whole laser system, the plasma mirror can be implemented without any modification to the system itself. Further advantages are wide bandwidth acceptance as will be discussed later Nomura et al (2007), and spatial filtering effect if the plasma mirror is in the vicinity of the laser focus Gold ( The temporally resolved reflectivity during the plasma mirror is formed was measured to be 300-1000 fs determined with 100-500 fs laser pulses Bor et al (1995); von der Linde et al…”

“…A plasma mirror was implemented in a few-cycle laser system and characterized in detail Nomura et al (2007);Nomura (2008). The reflectivity and the focusability were determined in s-and p-polarization and the time resolved contrast improvement was also measured.…”

Laser Pulse Contrast Ratio Cleaning in 100 TW Scale Ti: Sapphire Laser Systems

“…The advantage of such a technique is to reduce both the pre-pulse, ASE and rising font of the laser pulse. Several group have developed plasma mirror systems (Doumy et al, 2004;Dromey et al, 2004;Hörlein et al, 2008;Nomura et al, 2007;Wittmann et al, 2006). A double plasma mirror geometry has been implemented on a 10 TW laser system at CEA-Saclay.…”