Periodically intensity-modulated pulses by optical parametric amplification for multicycle tunable terahertz pulse generation

Tóth, György and Fülöp, József A. and Hebling, János (2017) Periodically intensity-modulated pulses by optical parametric amplification for multicycle tunable terahertz pulse generation. OPTICS EXPRESS, 25 (23). pp. 1-13. ISSN 1094-4087, ESSN: 1094-4087

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Abstract

The superposition of signal and idler pulses in dual- chirped optical parametric amplification is proposed for the efficient generation of intensity-modulated pulses with periodic modulation. Both the duration and the modulation period are easily and independently adjustable. Numerical simulations for a three-stage optical parametric amplifier system predicted an efficiency as high as ~50% for about 40 mJ of output pulse energy at a wavelength of 2 μm. Sources of such intensity-modulated pulses near 1.6 μm or 2 μm wavelength, pumped by Ti:sapphire or Yb-doped lasers, can be ideally suited for intense multicycle THz pulse generation with tunable frequency and bandwidth by optical rectification for example in organic, semiconductor, or lithium niobate materials.

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