12-15 July 2011
Saint George Hotel
Africa/Johannesburg timezone

Decomposition of the field within an apertured plano-concave resonator

13 Jul 2011, 11:15
15m
Acro4

Acro4

Oral Presentation Track C - Lasers, Optics and Spectroscopy LOS

Speaker

Mr Darryl Naidoo (Council for Scientific and Industrial Research)

Description

A method of experimentally decomposing a field within an apertured plano-concave resonator cavity into a forward propagating field (plane to concave) and a backward propagating field (concave to plane) is presented. The use of an intra-cavity aperture which is a simple method of laser beam shaping is a means of mode selection as higher-order modes are actively discriminated. This apertured cavity is modelled by two fundamental resonator theories, namely, Fox-Li analysis and Laguerre-Gaussian decomposition where they are used in the determination of the respective beam profiles at a specific plane. These theories traditionally differ from one another for an apertured cavity where the Gaussian beam within the cavity is truncated. A preliminary set-up is characterized for Gaussian propagation in an attempt to verify that the cavity is viable and accurate. A comparison of experimental data with the theories is presented.

Consider for a student <br> &nbsp; award (Yes / No)? Yes
Level (Hons, MSc, <br> &nbsp; PhD, other)? MSc
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)? No

Primary author

Mr Darryl Naidoo (Council for Scientific and Industrial Research)

Co-authors

Prof. Andrew Forbes (Council for Scientific and Industrial Research) Prof. Kamel Aït-Ameur (CIMAP—ENSICAEN)

Presentation Materials

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