Damage threshold improvement of HfO2/SiO2 coating by 1 064nm laser conditioning

hu jian-ping; ma ping; xu qiao

Volume 15 Issue 11

Nov. 2003

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hu jian-ping, ma ping, xu qiao. Damage threshold improvement of HfO2/SiO2 coating by 1 064nm laser conditioning[J]. High Power Laser and Particle Beams, 2003, 15.

Citation:

hu jian-ping, ma ping, xu qiao. Damage threshold improvement of HfO2/SiO2 coating by 1 064nm laser conditioning[J]. High Power Laser and Particle Beams, 2003, 15.

hu jian-ping, ma ping, xu qiao. Damage threshold improvement of HfO2/SiO2 coating by 1 064nm laser conditioning[J]. High Power Laser and Particle Beams, 2003, 15.

Citation:

hu jian-ping, ma ping, xu qiao. Damage threshold improvement of HfO2/SiO2 coating by 1 064nm laser conditioning[J]. High Power Laser and Particle Beams, 2003, 15.

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Damage threshold improvement of HfO2/SiO2 coating by 1 064nm laser conditioning

1.
Chengdu Fine Optical Engineering Research Center,P.O.Box 450,Chengdu 610041,China

Publish Date: 2003-11-15

Abstract

Abstract

In this paper, the Nd:YAG laser with wavelength 1 064nm is used to study the improvement effect of damage threshold of HfO2/SiO2 coating samples. The experiment of laser conditioning effect was taken by use of N-on-1 mode, namely the irradiation energy density started from about 70% of the damage threshold, and increased 5J/cm2 energy pulse by pulse until serious damage appeared. The experiment results show that 1064nm laser irradiation can improve the damage threshold of HfO2/SiO2 coating up to 3 times. The mechanisms of laser conditioning on HfO2/SiO2 mirror are found in two forms: laser annealing and laser cleaning of coating. Laser annealing can increase the damage threshold of non-defective coating up to 3 times on the average. Laser cleaning means that coating defects such as nodul
- laser damage,
- laser condition,
- hfo2/sio2 high reflecting coatings

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