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Proceedings Paper

Odd-mode separation in hemispheric resonator with bi-prism like element
Author(s): Yurij Parkhomenko; Boris Spektor; Joseph Shamir
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Paper Abstract

New methods of laser metrology (interferometry and microscopy) based on applications of beams with special structures provide increased resolution and efficiency. To generate a beam with linear singularity (dark beam) we recently proposed a beam shaping method using a bi-prism-like element within the laser resonator. There we have studied resonators that are traditionally designed to oscillate on the fundamental mode designed within the range of configuration parameters, 0.5⩽G⩽1. In the present work we extend the approach and show that the choice of specific configurations, outside the above range of configuration parameters, can lead to much better results for our application. This is the case in particular for an approximately semi-concentric resonator (G ~ -1).The optimal dark beam is obtained for a bi-prism angle about twice that obtained for the earlier configurations. For this case the difference between the losses of the first odd mode and other modes is 0.12-0.15, which is adequate for oscillation on this mode in lasers with any type of active media.

Paper Details

Date Published: 14 February 2007
PDF: 9 pages
Proc. SPIE 6452, Laser Resonators and Beam Control IX, 64520F (14 February 2007); doi: 10.1117/12.701956
Show Author Affiliations
Yurij Parkhomenko, Technion-Israel Institute of Technology (Israel)
Boris Spektor, Technion-Israel Institute of Technology (Israel)
Joseph Shamir, Technion-Israel Institute of Technology (Israel)

Published in SPIE Proceedings Vol. 6452:
Laser Resonators and Beam Control IX
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko, Editor(s)

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