Generation of intrinsically CEP stable few-cycle pulses in the mid-IR
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منابع مشابه
Mid-IR short-pulse OPCPA with micro-Joule energy at 100kHz.
We present a novel mid-IR source based on optical parametric chirped pulse amplification (OPCPA) generating 96 fs pulses (9.0 cycles) at 3.2 mm with an energy of 1.2 microJ, at a repetition rate of 100 kHz. The amplified spectrum supports a minimum Fourier transform limited pulse duration of 45 fs, or 4.2 cycles. Our use of OPCPA allows the direct amplification of few-cycle pulses at this mid-I...
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In this work, optical pulse amplification by parametric chirped-pulse amplification (OPCPA) has been applied to the generation of high-energy, few-cycle optical pulses in the near-infrared (NIR) and infrared (IR) spectral regions. Amplification of such pulses is ordinarily difficult to achieve by existing techniques of pulse amplification based on standard laser gain media followed by external ...
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We study THz-emission from a plasma driven by an incommensurate-frequency two-colour laser field. A semi-classical transient electron current model is derived from a fully quantum-mechanical description of the emission process in terms of sub-cycle field-ionization followed by continuum-continuum electron transitions. For the experiment, a CEP-locked laser and a near-degenerate optical parametr...
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We demonstrate a four-stage optical parametric chirped-pulse amplification (OPCPA) system delivering carrierenvelope phase (CEP)-stable ∼1.5-μm pulses with energies up to 12.5 mJ before recompression. The system is based on a fusion of femtosecond DPSS Yb technology and a picosecond 100-mJ Nd:YAG pump laser. Pulses with 62-nm bandwidth are recompressed to a 74.4-fs duration close to the transfo...
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Cross-correlation frequency-resolved optical gating (XFROG) based on four-wave mixing (FWM) in a gas medium is shown to enable dispersion-free characterization of few-cycle mid-infrared (mid-IR) pulses tunable within a spectral range of more than two octaves. The FWMXFROG technique is used to measure spectra and pulse shapes, as well as to retrieve the phase of a few-cycle output of difference-...
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