Abstract
We report the design, implementation, and characterization of a grism-pair stretcher in a near-infrared noncollinear optical parametric chirped-pulse amplifier (OPCPA) that is capable of controlling a bandwidth of 440 nm. Our dynamic dispersion control scheme relies on the grism stretcher working in conjunction with an acousto-optic programmable dispersive filter (Dazzler) to jointly compensate large amount of material dispersion. A spectral interference technique is used to characterize the spectral phase of the grism stretcher. This ultra-broadband device opens up the way to generate sub-2-cycle laser pulses.
Highlights
High-peak-power few-cycle light sources are indispensible for advancing the frontiers of attosecond science, quantum coherent control, and nonlinear optics [1]
We report the design, implementation, and characterization of a grism-pair stretcher in a near-infrared noncollinear optical parametric chirped-pulse amplifier (OPCPA) that is capable of controlling a bandwidth of 440 nm
Our dynamic dispersion control scheme relies on the grism stretcher working in conjunction with an acousto-optic programmable dispersive filter (Dazzler) to jointly compensate large amount of material dispersion
Summary
High-peak-power few-cycle light sources are indispensible for advancing the frontiers of attosecond science, quantum coherent control, and nonlinear optics [1]. Zacharias extended the grism and Dazzler based stretcher design to various spectral ranges with 200 300 nm bandwidth and 750 - 850 nm central wavelength [19]. In this report we present the design, implementation, and characterization of a new grismpair stretcher, operating at the central wavelength of 760 nm, which is capable of controlling group delay over a range of more than a hundred picoseconds with a corresponding bandwidth of 445 nm that approaches the full octave. Together with an appropriately programmed phase produced by the Dazzler, the grism stretcher is designed to compensate for the positive dispersion of (1) the glass compressor (160 mm of SF57 and 100 mm of fused silica), (2) the BBO crystals in the optical parametric chirped-pulse amplifier (OPCPA) chain (10 mm crystal thickness in total), and (3) the 45 mm of TeO2 crystal in the Dazzler, at the center wavelength of 760 nm. All higher-order dispersion of the system is well compensated by the programmed phase of the Dazzler
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