Odd-mode separation in hemispheric resonator with bi-prism like element

Yurij Parkhomenko; Boris Spektor; Joseph Shamir

doi:10.1117/12.701956

14 February 2007 Odd mode separation in concentric resonators with bi-prism like element

Yurij Parkhomenko, Boris Spektor, Joseph Shamir

Proceedings Volume 6452, Laser Resonators and Beam Control IX; 64520F (2007) https://doi.org/10.1117/12.701956
Event: Lasers and Applications in Science and Engineering, 2007, San Jose, California, United States

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.

Citation Download Citation

Yurij Parkhomenko, Boris Spektor, and Joseph Shamir "Odd mode separation in concentric resonators with bi-prism like element", Proc. SPIE 6452, Laser Resonators and Beam Control IX, 64520F (14 February 2007); https://doi.org/10.1117/12.701956

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KEYWORDS

Resonators

Transmission electron microscopy

Mirrors

Laser resonators

Beam shaping

Chemical elements

Diffraction

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