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Interference properties of a light beam having a helical wave surface |
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| Authors: | J M Vaughan D V Willetts |
| Institution: | Royal Signals and Radar Establishment, St Andrews Road, Great Malvern, Worcestershire, UK |
| Abstract: | The spatial wave front characteristics of a laser were examined by two beam interference after amplitude division. Complex interference patterns were observed and are interpreted as due to a helical form of the phase front. This unusual form is implicit in previous analyses of cavity eigenfunctions, but the properties of such a helical co-phasal wavefront have not apparently been previously studied. |
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