Third harmonic order imaging as a focal spot diagnostic for high intensity laser-solid interactions

B. Dromey, C. Bellei, D.C. Carroll, R.J. Clarke, J.S. Green, S. Kar, S. Kneip, K. Markey, P. McKenna

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

As the state of the art for high power laser systems increases from terawatt to petawatt level and beyond, a crucial parameter for routinely monitoring high intensity performance is laser spot size on a solid target during an intense interaction in the tight focus regime (< 10 mu m). Here we present a novel, simple technique for characterizing the spatial profile of such a laser focal spot by imaging the interaction region in third harmonic order (3 omega(laser)). Nearly linear intensity dependence of 3 omega(laser) generation for interactions > 10(19) Wcm(-2) is demonstrated experimentally and shown to provide the basis for an effective focus diagnostic. Importantly, this technique is also shown to allow in-situ diagnosis of focal spot quality achieved after reflection from a double plasma mirror setup for very intense high contrast interactions (> 10(20) Wcm(-2)) an important application for the field of high laser contrast interaction science.
LanguageEnglish
Pages243-248
Number of pages5
JournalLaser and Particle Beams
Volume27
Issue number2
DOIs
Publication statusPublished - Jun 2009

Fingerprint

Solid state lasers
high power lasers
harmonics
Imaging techniques
Lasers
High power lasers
Beam plasma interactions
Mirrors
interactions
Plasmas
lasers
Monitoring
mirrors

Keywords

  • harmonic generation
  • intense laser interaction

Cite this

Dromey, B. ; Bellei, C. ; Carroll, D.C. ; Clarke, R.J. ; Green, J.S. ; Kar, S. ; Kneip, S. ; Markey, K. ; McKenna, P. / Third harmonic order imaging as a focal spot diagnostic for high intensity laser-solid interactions. In: Laser and Particle Beams. 2009 ; Vol. 27, No. 2. pp. 243-248.
@article{0121a8703d5b498e9d3c04e4089cc79d,
title = "Third harmonic order imaging as a focal spot diagnostic for high intensity laser-solid interactions",
abstract = "As the state of the art for high power laser systems increases from terawatt to petawatt level and beyond, a crucial parameter for routinely monitoring high intensity performance is laser spot size on a solid target during an intense interaction in the tight focus regime (< 10 mu m). Here we present a novel, simple technique for characterizing the spatial profile of such a laser focal spot by imaging the interaction region in third harmonic order (3 omega(laser)). Nearly linear intensity dependence of 3 omega(laser) generation for interactions > 10(19) Wcm(-2) is demonstrated experimentally and shown to provide the basis for an effective focus diagnostic. Importantly, this technique is also shown to allow in-situ diagnosis of focal spot quality achieved after reflection from a double plasma mirror setup for very intense high contrast interactions (> 10(20) Wcm(-2)) an important application for the field of high laser contrast interaction science.",
keywords = "harmonic generation, intense laser interaction",
author = "B. Dromey and C. Bellei and D.C. Carroll and R.J. Clarke and J.S. Green and S. Kar and S. Kneip and K. Markey and P. McKenna",
note = "Strathprints' policy is to record up to 8 authors per publication, plus any additional authors based at the University of Strathclyde. More authors may be listed on the official publication than appear in the Strathprints' record.",
year = "2009",
month = "6",
doi = "10.1017/S0263034609000329",
language = "English",
volume = "27",
pages = "243--248",
journal = "Laser and Particle Beams",
issn = "0263-0346",
number = "2",

}

Dromey, B, Bellei, C, Carroll, DC, Clarke, RJ, Green, JS, Kar, S, Kneip, S, Markey, K & McKenna, P 2009, 'Third harmonic order imaging as a focal spot diagnostic for high intensity laser-solid interactions' Laser and Particle Beams, vol. 27, no. 2, pp. 243-248. https://doi.org/10.1017/S0263034609000329

Third harmonic order imaging as a focal spot diagnostic for high intensity laser-solid interactions. / Dromey, B.; Bellei, C.; Carroll, D.C.; Clarke, R.J.; Green, J.S.; Kar, S.; Kneip, S.; Markey, K.; McKenna, P.

In: Laser and Particle Beams, Vol. 27, No. 2, 06.2009, p. 243-248.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Third harmonic order imaging as a focal spot diagnostic for high intensity laser-solid interactions

AU - Dromey, B.

AU - Bellei, C.

AU - Carroll, D.C.

AU - Clarke, R.J.

AU - Green, J.S.

AU - Kar, S.

AU - Kneip, S.

AU - Markey, K.

AU - McKenna, P.

N1 - Strathprints' policy is to record up to 8 authors per publication, plus any additional authors based at the University of Strathclyde. More authors may be listed on the official publication than appear in the Strathprints' record.

PY - 2009/6

Y1 - 2009/6

N2 - As the state of the art for high power laser systems increases from terawatt to petawatt level and beyond, a crucial parameter for routinely monitoring high intensity performance is laser spot size on a solid target during an intense interaction in the tight focus regime (< 10 mu m). Here we present a novel, simple technique for characterizing the spatial profile of such a laser focal spot by imaging the interaction region in third harmonic order (3 omega(laser)). Nearly linear intensity dependence of 3 omega(laser) generation for interactions > 10(19) Wcm(-2) is demonstrated experimentally and shown to provide the basis for an effective focus diagnostic. Importantly, this technique is also shown to allow in-situ diagnosis of focal spot quality achieved after reflection from a double plasma mirror setup for very intense high contrast interactions (> 10(20) Wcm(-2)) an important application for the field of high laser contrast interaction science.

AB - As the state of the art for high power laser systems increases from terawatt to petawatt level and beyond, a crucial parameter for routinely monitoring high intensity performance is laser spot size on a solid target during an intense interaction in the tight focus regime (< 10 mu m). Here we present a novel, simple technique for characterizing the spatial profile of such a laser focal spot by imaging the interaction region in third harmonic order (3 omega(laser)). Nearly linear intensity dependence of 3 omega(laser) generation for interactions > 10(19) Wcm(-2) is demonstrated experimentally and shown to provide the basis for an effective focus diagnostic. Importantly, this technique is also shown to allow in-situ diagnosis of focal spot quality achieved after reflection from a double plasma mirror setup for very intense high contrast interactions (> 10(20) Wcm(-2)) an important application for the field of high laser contrast interaction science.

KW - harmonic generation

KW - intense laser interaction

UR - http://dx.doi.org/10.1017/S0263034609000329

U2 - 10.1017/S0263034609000329

DO - 10.1017/S0263034609000329

M3 - Article

VL - 27

SP - 243

EP - 248

JO - Laser and Particle Beams

T2 - Laser and Particle Beams

JF - Laser and Particle Beams

SN - 0263-0346

IS - 2

ER -