A. Hardy, "Sensitivity of phase-conjugate resonators to intra, cavity phase perturbations," IEEE J. Quantum Electron. QE-17, 1581–1585 (1981).

P. W. Smith, O. R. Wood, P. J. Maloney, and C. R. Adams, "Transversely excited waveguide gas lasers," IEEE J. Quantum Electron. QE-17, 1166–1181 (1981).

R. Trebino and A. E. Siegman, "Phase conjugate reflection at arbitrary angles using TEM_{oo} pump beams," Opt. Commun. 32, 1–4 (1980).

J. F. Lam and W. P. Brown, "Optical resonators with phaseconjugate mirrors," Opt. Lett. 5, 61–63 (1980).

P. A. Bèlanger, A. Hardy, and A. E. Siegman, "Resonant modes of optical cavities with phase-conjugate mirrors," Appl. Opt. 19, 602–609 (1980).

J. Feinberg and R. W. Hellwarth, "Phase-conjugate mirrors with continuous-wave gain," Opt. Lett. 5, 519–521 (1980).

I. M. Bel'dyugin and E. M. Zenskov, "Theory of resonators with wavefront reversing mirrors," Sov. J. Quantum Electron. 9, 1198–1199 (1979); 10, 120 (1980).

J. AuYeung, D. Fekete, D. M. Pepper, and A. Yariv, "A theorical and experimental investigation of the modes of optical resonators with phase-conjugate mirrors," IEEE J. Quantum Electron. QE-15, 1180–1188 (1979).

S. Avrillier and J. Verdonck, "Coupling losses in laser resonators containing a hollow rectangular dielectric waveguide," J. Appl. Phys. 48, 4937–4941 (1977).

H. Krammer, "Field configuration and propagation constants of modes in hollow rectangular dielectric waveguides," IEEE J. Quantum Electron. QE-12, 505–507 (1976).

K. D. Laakman and W. H. Steier, "Waveguides: characteristic modes of hollow rectangular dielectric waveguides," Appl. Opt. 15, 1334–1340 (1976).

J. J. Degnan, "The waveguide laser: a review," Appl. Phys. 11, 1–33 (1976).

D. M. Henderson, "Waveguide lasers with intracavity electrooptic modulators: misalignment losses," Appl. Opt. 15, 1066–1070 (1976).

J. J. Degnan and D. R. Hall, "Finite-aperture waveguide-laser resonators," IEEE J. Quantum Electron. QE-9, 901–910 (1973).

R. L. Abrams, "Coupling losses in hollow waveguide laser resonators," IEEE J. Quantum Electron. QE-8, 838–843 (1972).

P. W. Smith, "A waveguide gas laser," Appl. Phys. Lett. 19, 132–134 (1971).

M. Abramowitz and I. A. Setgun, Handbook of Mathematical Functions (Dover, New York, 1964).

R. L. Abrams and A. N. Chester, "Resonator theory for hollow waveguide lasers," Appl. Opt. 13, 2117–2125 (1974).

R. L. Abrams, "Coupling losses in hollow waveguide laser resonators," IEEE J. Quantum Electron. QE-8, 838–843 (1972).

R. L. Abrams, "Waveguide gas lasers," in Laser Handbook, M. L. Stitch, ed. (North-Holland, Amsterdam, 1979), pp. 41–88.

P. W. Smith, O. R. Wood, P. J. Maloney, and C. R. Adams, "Transversely excited waveguide gas lasers," IEEE J. Quantum Electron. QE-17, 1166–1181 (1981).

J. AuYeung, D. Fekete, D. M. Pepper, and A. Yariv, "A theorical and experimental investigation of the modes of optical resonators with phase-conjugate mirrors," IEEE J. Quantum Electron. QE-15, 1180–1188 (1979).

S. Avrillier and J. Verdonck, "Coupling losses in laser resonators containing a hollow rectangular dielectric waveguide," J. Appl. Phys. 48, 4937–4941 (1977).

I. M. Bel'dyugin and E. M. Zenskov, "Theory of resonators with wavefront reversing mirrors," Sov. J. Quantum Electron. 9, 1198–1199 (1979); 10, 120 (1980).

J. J. Degnan, "The waveguide laser: a review," Appl. Phys. 11, 1–33 (1976).

J. J. Degnan and D. R. Hall, "Finite-aperture waveguide-laser resonators," IEEE J. Quantum Electron. QE-9, 901–910 (1973).

J. AuYeung, D. Fekete, D. M. Pepper, and A. Yariv, "A theorical and experimental investigation of the modes of optical resonators with phase-conjugate mirrors," IEEE J. Quantum Electron. QE-15, 1180–1188 (1979).

J. J. Degnan and D. R. Hall, "Finite-aperture waveguide-laser resonators," IEEE J. Quantum Electron. QE-9, 901–910 (1973).

M. Lyszik, F. Herlemont, and J. Lemaire, "A waveguide CO_{2} laser operating in a Gaussian mode; experimental analysis," Opt. Commun. 36, 327–330 (1981).

See, for example, J. D. Jackson, Classical Electrodynamics (Wiley, New York, 1975).

H. Krammer, "Field configuration and propagation constants of modes in hollow rectangular dielectric waveguides," IEEE J. Quantum Electron. QE-12, 505–507 (1976).

K. D. Laakmann, "Recent developments in rf excited CO_{2} waveguide lasers," in Digest of Conference on Laser and Electro- Optical Systems (Optical Society of America, Washington, D.C., 1980), paper TUKK3.

M. Lyszik, F. Herlemont, and J. Lemaire, "A waveguide CO_{2} laser operating in a Gaussian mode; experimental analysis," Opt. Commun. 36, 327–330 (1981).

M. Lyszik, F. Herlemont, and J. Lemaire, "A waveguide CO_{2} laser operating in a Gaussian mode; experimental analysis," Opt. Commun. 36, 327–330 (1981).

P. W. Smith, O. R. Wood, P. J. Maloney, and C. R. Adams, "Transversely excited waveguide gas lasers," IEEE J. Quantum Electron. QE-17, 1166–1181 (1981).

J. AuYeung, D. Fekete, D. M. Pepper, and A. Yariv, "A theorical and experimental investigation of the modes of optical resonators with phase-conjugate mirrors," IEEE J. Quantum Electron. QE-15, 1180–1188 (1979).

M. Abramowitz and I. A. Setgun, Handbook of Mathematical Functions (Dover, New York, 1964).

P. W. Smith, O. R. Wood, P. J. Maloney, and C. R. Adams, "Transversely excited waveguide gas lasers," IEEE J. Quantum Electron. QE-17, 1166–1181 (1981).

P. W. Smith, "A waveguide gas laser," Appl. Phys. Lett. 19, 132–134 (1971).

R. Trebino and A. E. Siegman, "Phase conjugate reflection at arbitrary angles using TEM_{oo} pump beams," Opt. Commun. 32, 1–4 (1980).

S. Avrillier and J. Verdonck, "Coupling losses in laser resonators containing a hollow rectangular dielectric waveguide," J. Appl. Phys. 48, 4937–4941 (1977).

P. W. Smith, O. R. Wood, P. J. Maloney, and C. R. Adams, "Transversely excited waveguide gas lasers," IEEE J. Quantum Electron. QE-17, 1166–1181 (1981).

J. AuYeung, D. Fekete, D. M. Pepper, and A. Yariv, "A theorical and experimental investigation of the modes of optical resonators with phase-conjugate mirrors," IEEE J. Quantum Electron. QE-15, 1180–1188 (1979).

I. M. Bel'dyugin and E. M. Zenskov, "Theory of resonators with wavefront reversing mirrors," Sov. J. Quantum Electron. 9, 1198–1199 (1979); 10, 120 (1980).

R. L. Abrams and A. N. Chester, "Resonator theory for hollow waveguide lasers," Appl. Opt. 13, 2117–2125 (1974).

D. M. Henderson, "Waveguide lasers with intracavity electrooptic modulators: misalignment losses," Appl. Opt. 15, 1066–1070 (1976).

K. D. Laakman and W. H. Steier, "Waveguides: characteristic modes of hollow rectangular dielectric waveguides," Appl. Opt. 15, 1334–1340 (1976).

P. A. Bèlanger, A. Hardy, and A. E. Siegman, "Resonant modes of optical cavities with phase-conjugate mirrors," Appl. Opt. 19, 602–609 (1980).

J. J. Degnan, "The waveguide laser: a review," Appl. Phys. 11, 1–33 (1976).

P. W. Smith, "A waveguide gas laser," Appl. Phys. Lett. 19, 132–134 (1971).

H. Krammer, "Field configuration and propagation constants of modes in hollow rectangular dielectric waveguides," IEEE J. Quantum Electron. QE-12, 505–507 (1976).

J. AuYeung, D. Fekete, D. M. Pepper, and A. Yariv, "A theorical and experimental investigation of the modes of optical resonators with phase-conjugate mirrors," IEEE J. Quantum Electron. QE-15, 1180–1188 (1979).

P. W. Smith, O. R. Wood, P. J. Maloney, and C. R. Adams, "Transversely excited waveguide gas lasers," IEEE J. Quantum Electron. QE-17, 1166–1181 (1981).

R. L. Abrams, "Coupling losses in hollow waveguide laser resonators," IEEE J. Quantum Electron. QE-8, 838–843 (1972).

J. J. Degnan and D. R. Hall, "Finite-aperture waveguide-laser resonators," IEEE J. Quantum Electron. QE-9, 901–910 (1973).

A. Hardy, "Sensitivity of phase-conjugate resonators to intra, cavity phase perturbations," IEEE J. Quantum Electron. QE-17, 1581–1585 (1981).

S. Avrillier and J. Verdonck, "Coupling losses in laser resonators containing a hollow rectangular dielectric waveguide," J. Appl. Phys. 48, 4937–4941 (1977).

R. Trebino and A. E. Siegman, "Phase conjugate reflection at arbitrary angles using TEM_{oo} pump beams," Opt. Commun. 32, 1–4 (1980).

I. M. Bel'dyugin and E. M. Zenskov, "Theory of resonators with wavefront reversing mirrors," Sov. J. Quantum Electron. 9, 1198–1199 (1979); 10, 120 (1980).

K. D. Laakmann, "Recent developments in rf excited CO_{2} waveguide lasers," in Digest of Conference on Laser and Electro- Optical Systems (Optical Society of America, Washington, D.C., 1980), paper TUKK3.

R. L. Abrams, "Waveguide gas lasers," in Laser Handbook, M. L. Stitch, ed. (North-Holland, Amsterdam, 1979), pp. 41–88.

See, for example, J. D. Jackson, Classical Electrodynamics (Wiley, New York, 1975).

M. Abramowitz and I. A. Setgun, Handbook of Mathematical Functions (Dover, New York, 1964).

M. Lyszik, F. Herlemont, and J. Lemaire, "A waveguide CO_{2} laser operating in a Gaussian mode; experimental analysis," Opt. Commun. 36, 327–330 (1981).

Avrillier and Verdonck^{9} have given Γ_{11} ≈ 4.1/*N*^{2} for *N* > 12.7. This expression appears to be incorrect in its magnitude as well as in its functional dependence on *N*.