Quasi-phase-matching high harmonic generation using trains of pulses produced using an array of birefringent plates

被引：26

作者：

O'Keeffe, Kevin ^{[1
]}

Robinson, Tom ^{[1
]}

Hooker, Simon M. ^{[1
]}

机构：

[1] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England

来源：

OPTICS EXPRESS | 2012年 / 20卷 / 06期

基金：

英国工程与自然科学研究理事会;

关键词：

COUNTERPROPAGATING LIGHT; X-RAYS; DYNAMICS;

D O I：

10.1364/OE.20.006236

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Quasi-phase-matched high harmonic generation using trains of up to 8 counter-propagating pulses is explored. 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. This effect is ascribed to changes of the coherence length L-c within the generating medium. Techniques for overcoming the variation of L-c are discussed. The pressure dependence of quasi-phase-matching is investigated and the switch from true-phase-matching to quasi-phase-matching is observed. (C) 2012 Optical Society of America

引用

页码：6236 / 6247

页数：12

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