Seven-octave high-brightness and carrier-envelope-phase-stable light source

Elu U, Maidment L, Vamos L, Tani F, Novoa D, Frosz MH, Badikov V, Badikov D, Petrov V, Russell PSJ, Biegert J (2020)

Publication Type: Journal article

Publication year: 2020


DOI: 10.1038/s41566-020-00735-1


High-brightness sources of coherent and few-cycle-duration light waveforms with spectral coverage from the ultraviolet to the terahertz would offer unprecedented versatility and opportunities for a wide range of applications from bio-chemical sensing(1) to time-resolved and nonlinear spectroscopy, and to attosecond light-wave electronics(2,3). Combinations of various sources with frequency conversion(4,5) and supercontinuum generation(6-9) can provide relatively large spectral coverage, but many applications require a much broader spectral range(10) and low-jitter synchronization for time-domain measurements(11). Here, we present a carrier-envelope-phase (CEP)-stable light source, seeded by a mid-infrared frequency comb(12,13), with simultaneous spectral coverage across seven optical octaves, from the ultraviolet (340 nm) into the terahertz (40,000 nm). Combining soliton self-compression and dispersive wave generation in an anti-resonant-reflection photonic-crystal fibre with intra-pulse difference frequency generation in BaGa2GeSe6, the spectral brightness is two to five orders of magnitude above that of synchrotron sources. This will enable high-dynamic-range spectroscopies and provide numerous opportunities in attosecond physics and material sciences(14,15).

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Elu, U., Maidment, L., Vamos, L., Tani, F., Novoa, D., Frosz, M.H.,... Biegert, J. (2020). Seven-octave high-brightness and carrier-envelope-phase-stable light source. Nature Photonics.


Elu, Ugaitz, et al. "Seven-octave high-brightness and carrier-envelope-phase-stable light source." Nature Photonics (2020).

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