Strength enhancement of single crystal laser components


The effect of chemical etching on the surface roughness and fracture strength of Nd:yttrium-aluminum-garnet single crystals was investigated. Etching the laser host material in a 1:1 mixture of concentrated sulfuric and phosphoric acid at elevated temperatures enabled material removal from the surface of laser rods cored from single-crystal boules. The roughness on the rod surface increased from the as-drilled condition after etching, but after 17 μm of material was removed, the roughness remained approximately constant. The modulus of rupture increased from 133-530 MPa when 87 μm of material was removed by the chemical etching procedure.

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  1. 1.

    Q. Xiao and J. Derby. J. Crystal Growth 139, 147 (1994).

    CAS  Article  Google Scholar 

  2. 2.

    S.M. Vatnik, R El-Agmy, and T. Graf, J. Mod. Optics 49, 2059 (2002).

    CAS  Article  Google Scholar 

  3. 3.

    W.A. Clarkson, J. Phys. D: Appl. Phys. 34, 2381 (2001).

    CAS  Article  Google Scholar 

  4. 4.

    W. Xie, S. Tam, Y. Lam, H. Yang, J. Liu, J. Gu, and W. Tan, Optics Laser Technol. 32, 193 (2003).

    Article  Google Scholar 

  5. 5.

    W. Koechner, Solid State Laser Engineering, 5th ed. (Springer, Berlin, 1999), pp. 48, 406–413.

  6. 6.

    T. Mah and T.A. Parthasarathy, Scripta Metall. Mater. 28, 1383 (1993).

    CAS  Article  Google Scholar 

  7. 7.

    W.R. Blumenthal and S.T. Taylor, Acta Mater. 45, 3071 (1997).

    CAS  Article  Google Scholar 

  8. 8.

    ASTM. ASTM Standard Test Methods for Strength of Glass by Flexure, Determination of Modulus of Rupture, Designation C 158 – 95 (ASTM, West Conshohocken, NJ, 1995).

  9. 9.

    M. Gerber and Th. Graf, Optics Laser Technol. 33, 449 (2001).

    CAS  Article  Google Scholar 

  10. 10.

    W. Koechner, Appl. Phys. 2, 279 (1973).

    Article  Google Scholar 

  11. 11.

    F.L. Vogel, W.G. Pfann, H.E. Corey, and E.E. Thomas, Phys. Rev. 90, 489 (1953).

    CAS  Article  Google Scholar 

  12. 12.

    A.T. Zlatkin and E.L. Lube, J. Crystal Growth 118, 218 (1992).

    CAS  Article  Google Scholar 

  13. 13.

    J. Marion, Appl. Phys. Lett. 47, 694 (1985).

    CAS  Article  Google Scholar 

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Correspondence to D. F. Bahr.

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Shafer, K.E., Eakins, D.E., Bahr, D.F. et al. Strength enhancement of single crystal laser components. Journal of Materials Research 18, 2537–2539 (2003).

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