Abstract
We demonstrate temporal shape improvement of a short laser pulse using chirped aperiodic nonlinear frequency converter within an optical parametric amplifier. The aperiodic converter generated walk-off free high spatial quality pulse with ∼40% efficiency second harmonic while preserving the pump bandwidth. A <300 fs idler pulse was generated, with ∼10 nm central wavelength tunability around 1053 nm by pump generation and phase matching control. A pronounced contrast pedestal suppression of up to 40 dB was observed within a few picoseconds range around the peak. Such pedestal suppression has good scalability potential to high energies.
| Original language | English |
|---|---|
| Article number | 075503 |
| Journal | Physica Scripta |
| Volume | 97 |
| Issue number | 7 |
| DOIs | |
| State | Published - 1 Jul 2022 |
Keywords
- aperiodicly poled crystal
- non-linear optics
- parametric amplifiers
- pulse contrast
- second harmonic
- ultrafast laser