Abstract

The mechanism of the interaction of CO2 laser radiation with fused silica is determined by the absorption depth of the radiation in the material. The extinction coefficient of a number of high-purity fused silica samples has been measured by the transmission method by fabricating samples ≈30 μm in thickness. Results obtained agree with the latest reported values. In addition, samples were heated by an auxiliary CO2 laser and the extinction coefficient determined as a function of temperature for six CO2 laser lines. No significant difference in the extinction coefficient was observed for samples from different makers of the high-purity silica. Measurements were also conducted on a silica-rich glass Vycor and a significant difference was observed.

© 1987 Optical Society of America

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References

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  1. G. W. Cleek, “The Optical Constants of Some Oxide Glasses in the Strong Absorption Region,” Appl. Opt. 5, 771 (1966).
    [CrossRef] [PubMed]
  2. R. Hanna, “Infrared Absorption Spectrum of Silicon Dioxide,” J. Am. Ceram. Soc. 48, 595 (1965).
    [CrossRef]
  3. I. Simon, H. O. McMahon, “Study of the Structure of Quartz Cristobalite, and Vitreous Silica by Reflection in Infrared,” J Chem. Phys. 21, 23 (1953).
    [CrossRef]
  4. H. R. Philipp, “Silicon Dioxide SiO2 (Glass),” in Handbook of Optical Constants of Solids, E. D. Palik, Ed. (Academic, London, 1985), pp. 749–763.
  5. G. N. Sprott, “A Method of Fabricating Optically Thin, Parallel-Sided Glass Samples,” MRL Technical Note, to be published.
  6. I. H. Malitson, “Interspecimen Comparison of the Refractive Index of Fused Silica,” J. Opt. Soc. Am. 55, 1205 (1965).
    [CrossRef]
  7. H. O. McMahon, “Thermal Radiation from Partially Transparent Reflecting Bodies,” J. Opt. Soc. Am. 40, 376 (1950).
    [CrossRef]
  8. O. S. Heavens, Optical Properties of Thin Solid Films (Butterworths, London, 1955), p. 55.
  9. H. A. Macleod, Thin Film Optical Filters (Adam Hilger, Ltd., London, 1969), p. 37.
  10. A. S. Tenney, J. Wong, “Vibrational Spectra of Vapor-Deposited Binary Borosilicate Glasses,” J. Chem. Phys. 56, 5516 (1972).
    [CrossRef]

1972 (1)

A. S. Tenney, J. Wong, “Vibrational Spectra of Vapor-Deposited Binary Borosilicate Glasses,” J. Chem. Phys. 56, 5516 (1972).
[CrossRef]

1966 (1)

1965 (2)

R. Hanna, “Infrared Absorption Spectrum of Silicon Dioxide,” J. Am. Ceram. Soc. 48, 595 (1965).
[CrossRef]

I. H. Malitson, “Interspecimen Comparison of the Refractive Index of Fused Silica,” J. Opt. Soc. Am. 55, 1205 (1965).
[CrossRef]

1953 (1)

I. Simon, H. O. McMahon, “Study of the Structure of Quartz Cristobalite, and Vitreous Silica by Reflection in Infrared,” J Chem. Phys. 21, 23 (1953).
[CrossRef]

1950 (1)

Cleek, G. W.

Hanna, R.

R. Hanna, “Infrared Absorption Spectrum of Silicon Dioxide,” J. Am. Ceram. Soc. 48, 595 (1965).
[CrossRef]

Heavens, O. S.

O. S. Heavens, Optical Properties of Thin Solid Films (Butterworths, London, 1955), p. 55.

Macleod, H. A.

H. A. Macleod, Thin Film Optical Filters (Adam Hilger, Ltd., London, 1969), p. 37.

Malitson, I. H.

McMahon, H. O.

I. Simon, H. O. McMahon, “Study of the Structure of Quartz Cristobalite, and Vitreous Silica by Reflection in Infrared,” J Chem. Phys. 21, 23 (1953).
[CrossRef]

H. O. McMahon, “Thermal Radiation from Partially Transparent Reflecting Bodies,” J. Opt. Soc. Am. 40, 376 (1950).
[CrossRef]

Philipp, H. R.

H. R. Philipp, “Silicon Dioxide SiO2 (Glass),” in Handbook of Optical Constants of Solids, E. D. Palik, Ed. (Academic, London, 1985), pp. 749–763.

Simon, I.

I. Simon, H. O. McMahon, “Study of the Structure of Quartz Cristobalite, and Vitreous Silica by Reflection in Infrared,” J Chem. Phys. 21, 23 (1953).
[CrossRef]

Sprott, G. N.

G. N. Sprott, “A Method of Fabricating Optically Thin, Parallel-Sided Glass Samples,” MRL Technical Note, to be published.

Tenney, A. S.

A. S. Tenney, J. Wong, “Vibrational Spectra of Vapor-Deposited Binary Borosilicate Glasses,” J. Chem. Phys. 56, 5516 (1972).
[CrossRef]

Wong, J.

A. S. Tenney, J. Wong, “Vibrational Spectra of Vapor-Deposited Binary Borosilicate Glasses,” J. Chem. Phys. 56, 5516 (1972).
[CrossRef]

Appl. Opt. (1)

J Chem. Phys. (1)

I. Simon, H. O. McMahon, “Study of the Structure of Quartz Cristobalite, and Vitreous Silica by Reflection in Infrared,” J Chem. Phys. 21, 23 (1953).
[CrossRef]

J. Am. Ceram. Soc. (1)

R. Hanna, “Infrared Absorption Spectrum of Silicon Dioxide,” J. Am. Ceram. Soc. 48, 595 (1965).
[CrossRef]

J. Chem. Phys. (1)

A. S. Tenney, J. Wong, “Vibrational Spectra of Vapor-Deposited Binary Borosilicate Glasses,” J. Chem. Phys. 56, 5516 (1972).
[CrossRef]

J. Opt. Soc. Am. (2)

Other (4)

O. S. Heavens, Optical Properties of Thin Solid Films (Butterworths, London, 1955), p. 55.

H. A. Macleod, Thin Film Optical Filters (Adam Hilger, Ltd., London, 1969), p. 37.

H. R. Philipp, “Silicon Dioxide SiO2 (Glass),” in Handbook of Optical Constants of Solids, E. D. Palik, Ed. (Academic, London, 1985), pp. 749–763.

G. N. Sprott, “A Method of Fabricating Optically Thin, Parallel-Sided Glass Samples,” MRL Technical Note, to be published.

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Figures (6)

Fig. 1
Fig. 1

Spectrophotometer transmission spectra of a sample of pure fused silica (Suprasil), 26 μm thick.

Fig. 2
Fig. 2

Schematic diagram of the experimental arrangement for transmission measurement of fused silica at elevated temperatures.

Fig. 3
Fig. 3

Values of the extinction coefficient calculated from the data of Fig. 1: —, pure fused silica; - - -, Vycor. The values were calculated from spectrophotometer transmittance measurements at 25°C.

Fig. 4
Fig. 4

Comparison of the present measurements (—) with previously reported values of the extinction coefficient of pure fused silica.

Fig. 5
Fig. 5

Example of the temperature dependence of the transmittance of fused silica (26.1-μm Suprasil) at a wavelength of 10.59 μm.

Fig. 6
Fig. 6

Measured temperature dependence of fused silica at wavelengths of 10.59 and 10.26 μm. The temperature dependence of Vycor at 10.59 μm is also shown.

Tables (2)

Tables Icon

Table I Details of Makers and Thickness of Samples Prepared In the Investigation

Tables Icon

Table II Temperature Dependence of the Extinction Coefficient Expressed for the Least-Squares Line of Best Fit k = a + bT (T in °C) for the Temperature Range and Wavelengths Indicated

Equations (1)

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t = 1 2 n δ ν ,

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