HfO2/SiO2 enhanced diamond turned aluminum mirrors for IR laser optics

Jue Wang; Ronald W. Davis; Angela Q Wang; Horst Schreiber; Scott J. Wilkinson; Joseph C. Crifasi; Robert D. Felock

doi:10.1117/12.900226

6 December 2011 HfO₂/SiO₂ enhanced diamond turned aluminum mirrors for IR laser optics

Jue Wang, Ronald W. Davis, Angela Q Wang, Horst Schreiber, Scott J. Wilkinson, Joseph C. Crifasi, Robert D. Felock

Proceedings Volume 8190, Laser-Induced Damage in Optical Materials: 2011; 819005 (2011) https://doi.org/10.1117/12.900226
Event: SPIE Laser Damage, 2011, Boulder, Colorado, United States

Abstract

HfO₂/SiO₂ multilayers were deposited on single point diamond turned aluminum substrates via modified reactive plasma ion assisted deposition to form a laser durable and environmentally stable dielectric enhanced IR mirror at a wavelength of 1064nm. The effect of the surface quality of the diamond turned aluminum on the optical performance of the dielectric enhanced mirror was assessed. A laser-induced damage threshold up to 11 J/cm² was obtained from the enhanced aluminum mirror tested in pulse mode at 1064nm with a pulse length of 20ns and a repetition rate of 20Hz. Laser damage morphology was revealed by a scanning electron microscopy. The damage mechanism was attributed to nodule defects generated by particle embedded on the aluminum substrate surface.

Citation Download Citation

Jue Wang, Ronald W. Davis, Angela Q Wang, Horst Schreiber, Scott J. Wilkinson, Joseph C. Crifasi, and Robert D. Felock "HfO₂/SiO₂ enhanced diamond turned aluminum mirrors for IR laser optics", Proc. SPIE 8190, Laser-Induced Damage in Optical Materials: 2011, 819005 (6 December 2011); https://doi.org/10.1117/12.900226

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