Publications by Simon Hooker


Quasi-phase-matching of high harmonic generation using counter-propagating pulses

EPJ Web of Conferences 41 (2013)

K O'Keeffe, SM Hooker

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.


Show full publication list