Showing papers by "Michael Bass published in 1973"
TL;DR: In this article, the optical field required to produce damage on a conventionally polished surface of a transparent medium is less than that required to damage an imperfection free surface, and electric field enhancement at imperfections can explain this result.
Abstract: Data are presented which show that the optical field required to produce damage on a conventionally polished surface of a transparent medium is less than that required to damage an imperfection‐free surface. Electric field enhancement at imperfections can explain this result. In addition, the bulk damage field at 1.06 μm is reported for three materials and is found to be the same as the surface damage field on imperfection‐free surfaces.
36 citations
TL;DR: In this paper, the threshold for laser damage to nonabsorbing dielectric coatings is determined by the presence of metallic or highly absorbing nonmetallic inclusions, and the morphology of threshold damage is studied.
Abstract: By studying the morphology of threshold damage and observing for the first time the predicted ``pulse duration‐inclusion size'' relationship, it is shown that the threshold for laser damage to nonabsorbing dielectric coatings is determined by the presence of metallic or highly absorbing nonmetallic inclusions.
29 citations
TL;DR: In this article, the intrinsic bulk damage in nine alkali-halide crystals was reported, and for all of these crystals the damage field was greater than or equal to that measured at 1.06 μm and dc.
Abstract: Ruby‐laser‐induced intrinsic bulk damage in nine alkali‐halide crystals is reported. Within experimental error and for all of these crystals the damage field is greater than or equal to that measured at 1.06 μm and dc. The trend in breakdown fields among these crystals at 0.69 μm differs from that at longer wavelengths and suggests that, even though electron avalanche breakdown is the likely damage mechanism, the first signs of a frequency dependence to this process appear by 4.3×1014 Hz.
25 citations
TL;DR: In this article, the effects of polycrystallinity and lattice disorder on the intrinsic laser-induced damage fields of transparent solids are reported, which is consistent with an electron avalanche intrinsic damage mechanism.
Abstract: Measurements of the effects of polycrystallinity and lattice disorder on the intrinsic laser‐induced damage fields of transparent solids are reported. Extreme lattice disorder such as present in a highly amorphous material such as fused quartz causes the damage field to increase, whereas less severe disorder does not measurably affect the breakdown strength. This is consistent with an electron avalanche intrinsic damage mechanism.
2 citations