Towards Terawatt Sub-Cycle Long-Wave Infrared Pulses Via Chirped Optical Parametric Amplification And Indirect Pulse Shaping

Abstract

We present an approach for both efficient generation and amplification of 4-12 μm pulses by tailoring the phase matching of the nonlinear crystal Zinc Germanium Phosphide (ZGP) in a narrowband-pumped optical parametric chirped pulse amplifier (OPCPA) and a broadband-pumped dual-chirped optical parametric amplifier (DC-OPA), respectively. Preliminary experimental results are obtained for generating 1.8-4.2 μm super broadband spectra, which can be used to seed both the signal of the OPCPA and the pump of the DC-OPA. The theoretical pump-To-idler conversion efficiency reaches 27% in the DC-OPA pumped by a chirped broadband Cr 2+:ZnSe/ZnS laser, enabling the generation ofTerawatt-level 4-12 μm pulses with an available large-Aperture ZGP. Furthermore, the 4-12 μm idler pulses can be compressed to sub-cycle pulses by compensating the tailored positive chirp of the idler pulses using the bulk compressor NaCl, and by indirectly controlling the higher-order idler phase through tuning the signal (2.4-4.0 μm) phase with a commercially available acousto-optic programmable dispersive filter (AOPDF). A similar approach is also described for generating high-energy 4-12 μm sub-cycle pulses via OPCPA pumped by a 2 μm Ho:YLF laser.

Publication Date

4-3-2017

Publication Title

Scientific Reports

Volume

8

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1038/srep45794

Socpus ID

85016710277 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85016710277

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