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Proceedings Paper

Higher-order azimuthal mode unstable resonator
Author(s): Richard J. Tansey; Victor L. Gamiz; Roger A. Mickish; Dale A. Holmes; David R. Kohler; John L. Martin; E. Pape
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Paper Abstract

A pulsed CO2 electric discharge fast flowing gain medium is used to test three unstable resonators which are forced to oscillate in an L = 3 azimuthal mode. This Higher Order Azimuthal Mode Unstable Resonator could be used to form a 'natural mode' resonator which would be unaffected by support struts necessary in an annular gain medium. Six equally spaced intracavity radial struts, and a suitable diameter on-axis obscuration, produce 180 degree phase changes between adjacent sectors of the six-sector near field pattern, and six radial lobes in the far field with no on-axis intensity. A phase plate, constructed by applying a half step coating to every other adjacent sector, corrects the far field.

Paper Details

Date Published: 1 June 1990
PDF: 14 pages
Proc. SPIE 1224, Optical Resonators, (1 June 1990); doi: 10.1117/12.18458
Show Author Affiliations
Richard J. Tansey, Rockwell International Corp. (United States)
Victor L. Gamiz, Rockwell International Corp. (United States)
Roger A. Mickish, Rockwell International Corp. (United States)
Dale A. Holmes, Rockwell International Corp. (United States)
David R. Kohler, Rockwell International Corp. (United States)
John L. Martin, Rockwell International Corp. (United States)
E. Pape, Rockwell International Corp. (United States)


Published in SPIE Proceedings Vol. 1224:
Optical Resonators
Dale A. Holmes, Editor(s)

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