The interaction of a high power laser beam with the lattice of transparent optical materials induces internal strains in the latter. Attention is focused on optical materials of zinc blende structure and excitation at the 10.6-(mu)m wavelength of the laser. A lattice dynamical treatment is presented to obtain the laser induced internal strains in terms of the lattice Green's functions, the transverse effective charge and the Raman coefficient. The transverse effective charge and the Raman coefficient are then thoroughly discussed and discrepancies in previous works concerning these parameters are resolved. / The imperfect lattice Green's functions are utilized to calculate the expected magnitude of the actual strains induced in real crystals taking into account the effect of lattice point defects. The mechanical laser damage thresholds at the 10.6-(mu)m CO(,2) laser wavelength are then obtained specifically for SiC, GaAs, InSb, ZnS, ZnSe, and CdTe materials, in good agreement with the available measured values.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.71832 |
| Date | January 1983 |
| Creators | Varshney, Subhash Chandra. |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Doctor of Philosophy (Department of Electrical Engineering.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 000186807, proquestno: AAINK64542, Theses scanned by UMI/ProQuest. |
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