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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 22 — Oct. 22, 2012
  • pp: 25169–25180

Transmittance increase after laser conditioning reveals absorption properties variation in DKDP crystals

Guohang Hu, Yuanan Zhao, Dawei Li, and Qiling Xiao  »View Author Affiliations

Optics Express, Vol. 20, Issue 22, pp. 25169-25180 (2012)

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By taking multiple measurements of transmittance before and after laser conditioning in DKDP crystals, we found that the transmittance was increased by 0.05%~0.4% through laser conditioning with maximum fluence 6J/cm2, and then decreased by about 0.1% after subsequent higher fluence conditioning. Variation of scattering intensity and absorber density, the two major factors leading to transmittance change, was monitored by on-line and off-line detection systems. The transmittance decrease was attributed to laser damage scattering, and the increase was derived from reduction of absorbers. Moreover, the absorption was reduced further at higher conditioning fluence. Based on the above analysis, the heating process during laser exposure was analyzed in the time domain, and a local rapid-rising and slow-cooling process was confirmed to reduce defect concentration, which can improve laser damage resistance and increase the transmittance.

© 2012 OSA

OCIS Codes
(140.3440) Lasers and laser optics : Laser-induced breakdown
(160.3380) Materials : Laser materials
(350.1820) Other areas of optics : Damage

ToC Category:

Original Manuscript: September 4, 2012
Revised Manuscript: October 12, 2012
Manuscript Accepted: October 13, 2012
Published: October 19, 2012

Guohang Hu, Yuanan Zhao, Dawei Li, and Qiling Xiao, "Transmittance increase after laser conditioning reveals absorption properties variation in DKDP crystals," Opt. Express 20, 25169-25180 (2012)

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