Carrier-envelope phase stabilized 5.6fs, 1.2mJ pulses

Mashiko, Hiroki; Nakamura, Christopher M.; Li, Chengquan; Moon, Eric; Wang, He; Tackett, Jason L.; Chang, Zenghu

doi:10.1063/1.2724919

Cited by 63 publications

(31 citation statements)

References 29 publications

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“…16 The input pulse duration was adjusted by changing the gas pressure in the hollow-core fiber and was measured by frequency resolved optical gating. The CE phase of the oscillator of the CPA system was locked by the self-referencing technique, and the slow drift in the amplifier was compensated through feedback control of the grating separation.…”

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confidence: 99%

Effects of laser pulse duration on extreme ultraviolet spectra from double optical gating

Gilbertson

Mashiko

et al. 2008

Applied Physics Letters

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Previously a two-color field was combined with a polarization gating to allow for the generation of single isolated attosecond pulses from multicycle lasers. Here, the scaling of energy for the extreme ultraviolet pulses corresponding to single attosecond pulses as a function of input laser pulse duration was investigated for argon, neon, and helium gas. Laser pulses as long as 12 fs were able to generate extreme ultraviolet supercontinua with high photon flux. The spectra profile depended strongly on the carrier envelope phase of the pump laser.

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Effects of laser pulse duration on extreme ultraviolet spectra from double optical gating

Gilbertson

Mashiko

et al. 2008

Applied Physics Letters

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“…At the output, the laser beam was collimated with an f = 300 mm concave silver mirror. At 800 nm, typical transmission through a 100 cm length hollow-core fibre ranges in between 50 and 60% [22,23]. However, due to the low quality of the mode at 1400 nm, the transmission efficiency was nearer 30%.…”

Section: Methodsmentioning

confidence: 99%

High harmonic generation with a spatially filtered optical parametric amplifier

Bandulet¹,

Comtois²,

Shiner³

et al. 2008

J. Phys. B: At. Mol. Opt. Phys.

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Numerous applications of high harmonic generation (HHG), such as attosecond pulse synthesis, depend on the ability to increase the electron recollision energy, which is a quadratic function of the driver wavelength. High-energy infrared pulses obtained from an optical parametric amplifier (OPA) are thus attractive for driving the HHG process, thereby offering the opportunity to yield shorter attosecond pulses. However, the increase in driver wavelength is often outweighed by the poor spatial quality of the OPA source. In this paper, we demonstrate that HHG using OPA signal pulses is significantly improved by spatial filtering in a hollow-core fibre prior to focusing in the gas target in comparison with the unfiltered case. Ion yield measurements in combination with beam profile monitoring in the far field enabled control over the interaction volume. For similar interaction volumes, we observe that with less than half the energy per pulse, the HHG yield can increase by one order of magnitude with spatial filtering. The comparison between the harmonic yields in argon and krypton, and their respective dependence on the peak laser intensity, provide experimental evidence that strongly suggests that the enhancement is due to improved phase matching.

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“…9,45,46 The short pulses were obtained by spectrally broadening the input pulses with a gas-filled hollowcore fiber and then temporally compressing them with a set of chirped mirrors. 56 These shortened pulses could then be used with the DOG or GDOG optics.…”

Section: Dog and Gdog Opticsmentioning

confidence: 99%