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We investigate cavity length detuning in a picosecond synchronously pumped optical parametric oscillator based on an aperiodically poled nonlinear crystal. A strong dependence on the sign of the quasi-phase matching period chirp is observed.
We demonstrated a high contrast 1053 nm femtosecond laser by exchanging the signal and idler in two stages non-collinear optical-parametric amplifier, 60 μI idler with measurement-limited contrast of 2.3×1011 was obtained within scale of sub-10 ps.
Chirped-pulse upconversion of sub-single-cycle mid-infrared pulses with gaseous media has been realized. Single-shot detection of mid-infrared spectra from 250 to 5500 cm−1 with 5 cm−1 resolution was demonstrated.
We present a novel optical interferometric strategy to generate arbitrary linear/nonlinear frequency-chirped electrical pulses with widely tunable center frequency. The Time-Bandwidth Product of these waveforms is twice that of current counterpart techniques.
We will discuss new quasi-phasematching design techniques and opportunities, including OPCPA gain-narrowing suppression and custom pulse synthesis, based on convex optimization. We will also discuss how apodization can be performed systematically for chirped-QPM devices.
Cavity-enhanced optical parametric chirped-pulse amplification (OPCPA) extends the capabilities of nonlinear crystals beyond material property limitations, namely nonlinear-coefficient and dispersion. Here we show a dramatic increase in conversion and a three-fold increase in gain bandwidth.
We present an electro-optic method for single-shot spatio-temporal THz waveform-mapping which avoids distortions associated with spectral encoding and retains the benefits of nonlinear cross-correlation but using linear detection. THz waveforms from laser-plasma accelerator are reconstructed.
We demonstrate identical and reversal relations between temporal pulse shapes and their spectrum envelopes through ultrashort optical parametric processes in the picosecond and femtosecond regimes.
A prototype single-crystal device efficiently converts a μJ-energy near-IR OPA pulse to the mid-IR by adiabatic frequency conversion, generating an octave-spanning pulse covering the 2–5-μm range and suggesting wide applicability to existing laser systems.
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