|
This article is cited in 2 scientific papers (total in 2 papers)
Laser applications and other topics in quantum electronics
Screw dislocations of laser speckle fields in interferograms with a circular line structure
B. D. Bobrov
Abstract:
Experimental results are used to show that circular interferograms are of interest in studies of screw dislocations of speckle-distorted laser beams because of a close correspondence between the symmetry of these interferograms and defects. The presence of dislocations transforms a system of the usual rings into a split network. Typical structure elements of such interferograms are right- and left-handed spirals connecting singular points of dislocations. Spiral fragments can be used in the diagnostics of dislocations regarded as independent defects. A method is suggested for the formation of highly directed optical beams with a low level of the usual aberrations, but with a complex phase surface topology. Screw dislocations are shown to be a natural analog of helical waves known in optics and capable of deliberate generation.
Received: 25.05.1990 Revised: 17.12.1990
Citation:
B. D. Bobrov, “Screw dislocations of laser speckle fields in interferograms with a circular line structure”, Kvantovaya Elektronika, 18:7 (1991), 886–890 [Sov J Quantum Electron, 21:7 (1991), 802–806]
Linking options:
https://www.mathnet.ru/eng/qe3955 https://www.mathnet.ru/eng/qe/v18/i7/p886
|
|