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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 6, Iss. 3 — Mar. 1, 2008
  • pp: 228–230

Influences of SiO2 protective layers and annealing on the laser-induced damage threshold of Ta2O5 films

Cheng Xu, Hongcheng Dong, Jianyong Ma, Yunxia Jin, Jianda Shao, and Zhengxiu Fan  »View Author Affiliations


Chinese Optics Letters, Vol. 6, Issue 3, pp. 228-230 (2008)


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Abstract

Ta2O5 films are prepared on BK7 substrates with conventional electron beam evaporation deposition. The effects of SiO2 protective layers and annealing on the laser-induced damage threshold (LIDT) of the films are investigated. The results show that SiO2 protective layers exert little influence on the electric field intensity (EFI) distribution, microstructure and microdefect density but increase the absorption slightly. Annealing is effective on decreasing the microdefect density and the absorption of the films. Both SiO2 protective layers and annealing are beneficial to the damage resistance of the films and the latter is more effective to improve the LIDT. Moreover, the maximal LIDT of Ta2O5 films is achieved by the combination of SiO2 protective layers and annealing.

© 2008 Chinese Optics Letters

OCIS Codes
(140.3330) Lasers and laser optics : Laser damage
(160.3380) Materials : Laser materials
(310.6860) Thin films : Thin films, optical properties

Citation
Cheng Xu, Hongcheng Dong, Jianyong Ma, Yunxia Jin, Jianda Shao, and Zhengxiu Fan, "Influences of SiO2 protective layers and annealing on the laser-induced damage threshold of Ta2O5 films," Chin. Opt. Lett. 6, 228-230 (2008)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-6-3-228

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