Carrier-envelope-phase stabilized terawatt class laser at 1 kHz with a wavelength tunable option

Abstract

We demonstrate a chirped-pulse-amplified Ti:Sapphire laser system operating at 1 kHz, with 20 mJ pulse energy, 26 femtosecond pulse duration (0.77 terawatt), and excellent long term carrier-envelope-phase (CEP) stability. A new vibrational damping technique is implemented to significantly reduce vibrational noise on both the laser stretcher and compressor, thus enabling a single-shot CEP noise value of 250 mrad RMS over 1 hour and 300 mrad RMS over 9 hours. This is, to the best of our knowledge, the best long term CEP noise ever reported for any terawatt class laser. This laser is also used to pump a white-light-seeded optical parametric amplifier, producing 6 mJ of total energy in the signal and idler with 18 mJ of pumping energy. Due to preservation of the CEP in the white-light generated signal and passive CEP stability in the idler, this laser system promises synthesized laser pulses spanning multi-octaves of bandwidth at an unprecedented energy scale.

Carrier-to-envelope phase-stable, mid-infrared, ultrashort pulses from a hybrid parametric generator: Cr:ZnSe laser amplifier system

“…The standard deviation of the CEP as a function of accumulation time is then evaluated to be: 250 ± 60mrad, 310 ± 60mrad and 420 ± 50mrad for the 9sec, 90sec and 14min scans respectively. These values convey a reasonable CEP stability levels of the output, on par with the values commonly reported for OPA's and amplified lasers [14,[33][34][35][36][37]. Nevertheless, we believe that our hybrid amplifier has a capacity for a better CEP stability.…”

An intense, few-cycle source in the long-wave infrared

“…Additional information about the laser and OPA system can be found in Langdon et al . 27 . DFG between the signal and idler of the OPA is performed in an interferometer-based setup.…”

“…The XFROG characterization is insensitive to the value of the CEP and the source was not run in a mode to provide CEP stability to the LWIR fields. In the future, we can expect to deliver CEP stable LWIR fields by actively stabilizing the CEP of the Ti:Sapph system 27 . This, combined with the OPA’s passively CEP stable idler 29 , provides a straightforward route to phase stable LWIR fields.…”

Ionization Study of Isomeric Molecules in Strong-field Laser Pulses

“…5(a) for a layout of the experimental setup. Our experiment makes use of the High Intensity Tunable Source (HITS) laser, a Ti-Sapphire multipass, cryo-cooled, CPA amplified 38 laser with 790 nm central wavelength, ≈30 fs FWHM pulse duration, 1 kHz rep. rate, and ≈50 nm bandwidth 39 . The intensity of the laser is controlled by a rotatable half waveplate and a polarizing beam cube.…”