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Brief Communications

Optical strength of the surface of a transparent dielectric

Yu. N. Lokhov, V. S. Mospanov, Yu. D. Fiveiskii


Abstract: A dynamic theory is developed for the optical strength of a dielectric acted upon by nanosecond laser pulses. It is shown that the surface absorption plays an important role. The contribution of this absorption to the thermoelastic stresses predominates over the contribution of the striction and volume absorption. A mechanism is suggested by the thermoelastic stresses. The power of a pulse causing such damage is calculated.

UDC: 535.211

PACS: 62.20.Dc, 81.40.Jj, 68.35.Gy, 78.68.+m

Received: 31.05.1972

 English version: Soviet Journal of Quantum Electronics, 1973, 3:2, 132–133