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A high‐power femtosecond Yb:fiber system is seeded by a phase‐locked Er:fiber source and drives an ultra‐broadband optical parametric amplifier that operates at 10 MHz repetition rate. The resulting pulses display precise control of the carrier‐envelope phase. Their 8.3 fs temporal duration corresponds to 2.3 optical cycles of the 1100 nm carrier wavelength. Focusing 200 nJ of pulse energy into widegap...
Generation of optical harmonics is an appealing research area due to the prospect of table-top light sources in the extreme ultraviolet and generation of attosecond pulses [1]. Excitation of harmonics in solids shows intrinsic differences compared to the process in gases and has yet to be fully explained [2]. In addition, such experiments are likely to provide fundamental insights into the electronic...
We demonstrate carrier-envelope phase control of even and odd harmonics in solids up to fifth order with intense 2.3-cycle pulses from a near-infrared optical parametric amplifier operated at 10 MHz repetition rate.
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