Anisotropy of the photo-elastic effect in Nd:KGd(WO4)2 laser crystals

P. A. Loiko, Vasili Savitski, Alan Kemp, A. A. Pavlyuk, N.V. Kuleshov, K. V. Yumashev

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The anisotropy of thermal lensing and the photo-elastic effect is characterized for diode-pumped Nd : KGd(WO4)2 crystals cut along the Np and Ng optical indicatrix axes and along its optical axis, O = Ng + 43°, at a laser wavelength of 1067 nm. Distortions in the spatial profile of the output laser beam are analyzed. The thermal lens is astigmatic; the orientation of its principal meridional planes, A and B, is determined by the anisotropy of photo-elastic effect. The thermal lens has opposite signs for rays lying in the principal meridional planes for Np- and O-cut crystals; it is positive for an Ng-cut crystal. The increase of thermal lens optical power after absorption of 1 W of pump power, i.e. the thermal lens sensitivity factors MA(B), and astigmatism degree S = |MA–MB| are determined. The photo-elastic effect was found to increase the optical power of the thermal lens and was significant for all studied crystal orientations.
LanguageEnglish
Article number055002
Number of pages7
JournalLaser Physics Letters
Volume11
Issue number5
Early online date14 Mar 2014
DOIs
Publication statusPublished - May 2014

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Photoelasticity
thermal lensing
Anisotropy
Lenses
Crystals
anisotropy
Lasers
crystals
lasers
astigmatism
Crystal orientation
Laser beams
Hot Temperature
rays
Diodes
diodes
Pumps
laser beams
pumps
Wavelength

Keywords

  • thermal lensing
  • optical power
  • crystal orientations

Cite this

Loiko, P. A. ; Savitski, Vasili ; Kemp, Alan ; Pavlyuk, A. A. ; Kuleshov, N.V. ; Yumashev, K. V. / Anisotropy of the photo-elastic effect in Nd:KGd(WO4)2 laser crystals. In: Laser Physics Letters. 2014 ; Vol. 11, No. 5.
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abstract = "The anisotropy of thermal lensing and the photo-elastic effect is characterized for diode-pumped Nd : KGd(WO4)2 crystals cut along the Np and Ng optical indicatrix axes and along its optical axis, O = Ng + 43°, at a laser wavelength of 1067 nm. Distortions in the spatial profile of the output laser beam are analyzed. The thermal lens is astigmatic; the orientation of its principal meridional planes, A and B, is determined by the anisotropy of photo-elastic effect. The thermal lens has opposite signs for rays lying in the principal meridional planes for Np- and O-cut crystals; it is positive for an Ng-cut crystal. The increase of thermal lens optical power after absorption of 1 W of pump power, i.e. the thermal lens sensitivity factors MA(B), and astigmatism degree S = |MA–MB| are determined. The photo-elastic effect was found to increase the optical power of the thermal lens and was significant for all studied crystal orientations.",
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Anisotropy of the photo-elastic effect in Nd:KGd(WO4)2 laser crystals. / Loiko, P. A.; Savitski, Vasili; Kemp, Alan; Pavlyuk, A. A.; Kuleshov, N.V.; Yumashev, K. V.

In: Laser Physics Letters, Vol. 11, No. 5, 055002, 05.2014.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Anisotropy of the photo-elastic effect in Nd:KGd(WO4)2 laser crystals

AU - Loiko, P. A.

AU - Savitski, Vasili

AU - Kemp, Alan

AU - Pavlyuk, A. A.

AU - Kuleshov, N.V.

AU - Yumashev, K. V.

PY - 2014/5

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N2 - The anisotropy of thermal lensing and the photo-elastic effect is characterized for diode-pumped Nd : KGd(WO4)2 crystals cut along the Np and Ng optical indicatrix axes and along its optical axis, O = Ng + 43°, at a laser wavelength of 1067 nm. Distortions in the spatial profile of the output laser beam are analyzed. The thermal lens is astigmatic; the orientation of its principal meridional planes, A and B, is determined by the anisotropy of photo-elastic effect. The thermal lens has opposite signs for rays lying in the principal meridional planes for Np- and O-cut crystals; it is positive for an Ng-cut crystal. The increase of thermal lens optical power after absorption of 1 W of pump power, i.e. the thermal lens sensitivity factors MA(B), and astigmatism degree S = |MA–MB| are determined. The photo-elastic effect was found to increase the optical power of the thermal lens and was significant for all studied crystal orientations.

AB - The anisotropy of thermal lensing and the photo-elastic effect is characterized for diode-pumped Nd : KGd(WO4)2 crystals cut along the Np and Ng optical indicatrix axes and along its optical axis, O = Ng + 43°, at a laser wavelength of 1067 nm. Distortions in the spatial profile of the output laser beam are analyzed. The thermal lens is astigmatic; the orientation of its principal meridional planes, A and B, is determined by the anisotropy of photo-elastic effect. The thermal lens has opposite signs for rays lying in the principal meridional planes for Np- and O-cut crystals; it is positive for an Ng-cut crystal. The increase of thermal lens optical power after absorption of 1 W of pump power, i.e. the thermal lens sensitivity factors MA(B), and astigmatism degree S = |MA–MB| are determined. The photo-elastic effect was found to increase the optical power of the thermal lens and was significant for all studied crystal orientations.

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KW - optical power

KW - crystal orientations

U2 - 10.1088/1612-2011/11/5/055002

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