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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 11, Iss. 2 — Feb. 1, 1986
  • pp: 76–78

Unstable resonators with negative equivalent Fresnel numbers

A. H. Paxton  »View Author Affiliations


Optics Letters, Vol. 11, Issue 2, pp. 76-78 (1986)
http://dx.doi.org/10.1364/OL.11.000076


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Abstract

The equivalent Fresnel numbers of two unstable resonators of current interest for application in free-electron lasers are negative. For a resonator of this class, the equivalent collimated round-trip propagation of Siegman’s canonical formulation is a time-reversed propagation, and the modes and eigenvalues are the complex conjugates of those corresponding to a resonator having a positive equivalent Fresnel number with the same magnitude.

© 1986 Optical Society of America

History
Original Manuscript: August 12, 1985
Manuscript Accepted: November 18, 1985
Published: February 1, 1986

Citation
A. H. Paxton, "Unstable resonators with negative equivalent Fresnel numbers," Opt. Lett. 11, 76-78 (1986)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-11-2-76

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