Open AccessNovel method for the angular chirp compensation of passively CEP-stable few-cycle pulses
Author(s) -
Giovanni Cirmi,
Hüseyin Çankaya,
Peter Krogen,
Anne-Laure Calendron,
Yi Hua,
Benoît Debord,
F. Gérôme,
Fetah Benabid,
Franz X. Kärtner
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.384290
Subject(s) - chirp , optics , broadband , physics , pulse compression , coupling (piping) , energy conversion efficiency , materials science , laser , optoelectronics , telecommunications , radar , computer science , metallurgy
We demonstrate a novel, energy-efficient, cost-effective simple method for seeding CEP-stable OPCPAs. We couple the CEP-stable idler of a broadband OPCPA into a hollow core Kagome fiber thus compensating for the angular chirp. We obtain either relatively narrow bandwidths with ∼36% coupling efficiency or quarter-octave spanning bandwidths with ∼2.2% coupling efficiency. We demonstrate spectral compressibility, good beam quality and CEP stability. Our source is an ideal seed for high-energy, high-average power, CEP-stable few-cycle OPCPA pulses around 2 µm, which can drive the generation of coherent soft X-ray radiation in the water window spectral region via HHG.