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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 10 — Apr. 1, 2013
  • pp: 2055–2061

Analysis of optical damage in germanium induced by a continuous wave laser

Kwang Hyun Lee, Wan Soon Shin, and Eung Cheol Kang  »View Author Affiliations

Applied Optics, Vol. 52, Issue 10, pp. 2055-2061 (2013)

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To analyze optical damage of germanium (Ge) induced by a continuous wave (CW) laser, numerical and experimental studies were carried out. Temperature and solid–liquid phase transition with laser conditions were estimated by numerical simulation. In our experiments, we examined morphological changes with hillocks, material changes in the GeO2 layer by oxidation, and new crystal domains formed by recrystallization. The material damage process was explained. Transmittance reduction was also observed in the mid-infrared region. We confirmed that hillock formation, oxidation, and recrystallization through resolidification are critical factors in damaging the optical performance of Ge with a CW laser.

© 2013 Optical Society of America

OCIS Codes
(000.4430) General : Numerical approximation and analysis
(140.3330) Lasers and laser optics : Laser damage
(140.6810) Lasers and laser optics : Thermal effects
(160.4670) Materials : Optical materials

ToC Category:
Lasers and Laser Optics

Original Manuscript: November 27, 2012
Revised Manuscript: February 12, 2013
Manuscript Accepted: February 20, 2013
Published: March 25, 2013

Kwang Hyun Lee, Wan Soon Shin, and Eung Cheol Kang, "Analysis of optical damage in germanium induced by a continuous wave laser," Appl. Opt. 52, 2055-2061 (2013)

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