Abstract

Quarterwave antireflective coatings of CaF2 and MgF2 have been prepared on fused silica and calcium fluoride substrates from colloidal suspensions of the relevant fluorides in methanol. These coatings have high optical efficiency and laser damage thresholds at 350 nm in the 6–8-J/cm2 range for single shots of 0.6-ns pulse length and 20–25 J/cm2 for 25-Hz multishots of 25-ns pulse length.

© 1988 Optical Society of America

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References

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  1. H. K. Pulker, “Characterization of Optical Thin Films,” Appl. Opt. 18, 1969 (1979).
    [CrossRef] [PubMed]
  2. H. K. Pulker, Coatings on Glass (American Elsevier, New York, 1984), pp. 92–270.
  3. P. H. Joosten, P. Heller, M. J. P. Nabben, H. A. M. van Hal, T. J. A. Popma, J. Haisma, “Optical Thin Layers of MgF2 Produced by Decomposition of Organic Magnesium-Fluoro Compounds,” Appl. Opt. 24, 2674 (1985).
    [CrossRef] [PubMed]
  4. H. R. Moulton, “Compositions for Reducing the Reflection of Light,” U.S. Patent2,601,123 (1952), assigned to American Optical Co.
  5. I. M. Thomas, “High Laser Damage Threshold Porous Silica Antireflective Coatings,” Appl. Opt. 25, 1481 (1986).
    [CrossRef] [PubMed]
  6. B. E. Yoldas, “Investigations of Porous Oxides as an Antireflective Coating for Glass Surfaces,” Appl. Opt. 19, 1425 (1980).
    [CrossRef] [PubMed]
  7. I. M. Thomas, “Single-Layer TiO2 and Multilayer TiO2–SiO2 Optical Coatings Prepared from Colloidal Suspensions,” Appl. Opt. 26, 4688 (1987).
    [CrossRef] [PubMed]
  8. H. Lund, J. Bjerrum, “A Simple Method for the Preparation of Anhydrous Alcohols,” Chem. Ber. 64, 210 (1931).

1987 (1)

1986 (1)

1985 (1)

1980 (1)

1979 (1)

1931 (1)

H. Lund, J. Bjerrum, “A Simple Method for the Preparation of Anhydrous Alcohols,” Chem. Ber. 64, 210 (1931).

Bjerrum, J.

H. Lund, J. Bjerrum, “A Simple Method for the Preparation of Anhydrous Alcohols,” Chem. Ber. 64, 210 (1931).

Haisma, J.

Heller, P.

Joosten, P. H.

Lund, H.

H. Lund, J. Bjerrum, “A Simple Method for the Preparation of Anhydrous Alcohols,” Chem. Ber. 64, 210 (1931).

Moulton, H. R.

H. R. Moulton, “Compositions for Reducing the Reflection of Light,” U.S. Patent2,601,123 (1952), assigned to American Optical Co.

Nabben, M. J. P.

Popma, T. J. A.

Pulker, H. K.

H. K. Pulker, “Characterization of Optical Thin Films,” Appl. Opt. 18, 1969 (1979).
[CrossRef] [PubMed]

H. K. Pulker, Coatings on Glass (American Elsevier, New York, 1984), pp. 92–270.

Thomas, I. M.

van Hal, H. A. M.

Yoldas, B. E.

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Figures (2)

Fig. 1
Fig. 1

Electron micrograph of CaF2 particles.

Fig. 2
Fig. 2

Transmission spectrum of a MgF2 coating on a fused silica substrate.

Equations (4)

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Mg ( OCOCH 3 ) 2 + 2 HF MgF 2 + 2 CH 3 COOH ; Mg ( OCH 3 ) 2 + 2 HF MgF 2 + 2 CH 3 OH .
Ca ( OCOCH 3 ) 2 + 2 HF CaF 2 + 2 CH 3 COOH .
Mg + 2 CH 3 OH Mg ( OCH 3 ) 2 + H 2 .
n c = n 1 · n 2 ,

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