Abstract

Modes, losses, and phase shift are determined for an open resonator formed by two equal and symmetric roof mirrors with roof angle α ranging from −8° to 100°. In all cases, the Fresnel number of the resonator was N = 1 and the mirror spacing L = 100λ. The results of the numerical analysis show two stability regions that correspond to quasi-flat-roof resonators and to quasi-90° roof resonators, respectively. The equivalence between a resonator with a small roof angle α (quasi-flat roof) and a resonator with roof angle (π + α)/2 is discussed. A quasi-90° roof resonator presents losses generally smaller than the equivalent flat-roof resonator.

© 1975 Optical Society of America

Integral equation for a 90° or a quasi-90° roof-mirror optical resonator

F. Pasqualetti and L. Ronchi
J. Opt. Soc. Am. 64(3) 289-294 (1974)

Modes and modes degeneracy in 90° and in quasi-90° roof open resonators

A. M. Scheggi, P. F. Checcacci, and R. Falciai
J. Opt. Soc. Am. 65(9) 1050-1053 (1975)

Modes of a laser resonator with a retroreflecting roof mirror

Guosheng Zhou and Lee W. Casperson
Appl. Opt. 20(20) 3542-3546 (1981)

Flat-Roof Resonators

G. Toraldo di Francia
Appl. Opt. 4(10) 1267-1270 (1965)

Low-Loss Modes and Resonances in a Quasi-90°-Roof Mirror Resonator

Laura Ronchi
Appl. Opt. 12(1) 93-97 (1973)