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Polarization-controlled quasi-phase matching for linearly and circularly polarized high harmonic generation

2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference CLEO EUROPE/IQEC IEEE (2013) 1-1

Authors:

LZ Liu, K O'Keeffe, SM Hooker
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Complete spatial characterization of an optical wavefront using a variable-separation pinhole pair

(2013)

Authors:

David T Lloyd, Kevin O'Keeffe, Simon M Hooker
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Quasi-phase-matching of high-order-harmonic generation using polarization beating in optical waveguides

(2013)

Authors:

Lewis Z Liu, Kevin O'Keeffe, Simon M Hooker
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Polarization-controlled quasi-phase-matching of high harmonic generation

EPJ Web of Conferences 41 (2013)

Authors:

LZ Liu, K O'Keeffe, SM Hooker

Abstract:

A new class of quasi-phase matching high harmonic generation is proposed where the polarization of the driving field is controlled in a waveguide. The first circularly polarized quasi-phase matched source is shown to be possible. © Owned by the authors, published by EDP Sciences, 2013.
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Quasi-phase-matching of high harmonic generation using counter-propagating pulses

EPJ Web of Conferences 41 (2013)

Authors:

K O'Keeffe, SM Hooker

Abstract:

We investigate quasi-phase-matching over a range of harmonic orders using trains of up to 8 uniformly-spaced counter-propagating pulses. For trains of up to 4 pulses the measured enhancement of the harmonic signal scales with the number of pulses N as (N+1)2, as expected. However, for trains with N > 4, no further enhancement of the harmonic signal is observed. The effect is ascribed to changes in the coherence length with the generating medium. The pressure dependence of quasi-phase-matching is also investigated and it is found that additional peaks in the harmonic intensity are consistent with higher-order QPM processes. © Owned by the authors, published by EDP Sciences, 2013.
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