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Proceedings Paper

Combined phase, near field, and far field diagnostic for large-aperture laser systems
Author(s): Andrew R. Barnes; I. C. Smith
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Paper Abstract

A method is described for extracting near field, far field and phase information from an interferogram of a laser system output generated by a self referencing, radial shear interferometer. The interferogram may be used as an amplitude mask of a coherent beam. This beam is numerically propagated to the far field where the laser output and its complex conjugate can be separated. The near field and optical phase difference map may then be extracted from the complex representation of the laser output obtained by propagating back to the near field. The practical application of this method and its limitations are discussed and compared with images from equivalent plane far field and near field cameras on the HELEN 2TW Nd:glass laser system.

Paper Details

Date Published: 23 July 1999
PDF: 9 pages
Proc. SPIE 3492, Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion, (23 July 1999); doi: 10.1117/12.354170
Show Author Affiliations
Andrew R. Barnes, Atomic Weapons Establishment plc (United Kingdom)
I. C. Smith, Atomic Weapons Establishment plc (United Kingdom)


Published in SPIE Proceedings Vol. 3492:
Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion

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