RT Journal Article T1 Transverse effects in the laser threshold due to electronic-vibrational coupling A1 Gómez Calderón, Óscar A1 Gonzalo Fonrodona, Isabel AB Transverse effects in the laser threshold, originated by electronic-vibrational coupling in the active centers, are analyzed theoretically by means of the semiclassical two-level Maxwell-Bloch equations. A single longitudinal mode is considered. It is found that the first laser threshold suffers modifications depending on the electronic-vibrational coupling strength. This coupling imposes certain conditions for the selection of a particular transverse spatial state and provides the minimum wavelength that can appear in the transverse pattern. The nature of the bifurcation and the stability of the homogeneous and critical traveling waves are analyzed. PB American Physical Society SN 1050-2947 YR 1998 FD 1998-03 LK https://hdl.handle.net/20.500.14352/59546 UL https://hdl.handle.net/20.500.14352/59546 LA eng NO [1] C. Cojan, G. Agrawal, and C. Flytzanis, Phys. Rev. B 15, 909 (1977).[2] B. P. Antoniuk, Solid State Commun. 33, 873 (1980).[3] G. J. Blanchard, Phys. Rev. Lett. 63, 887 (1989).[4] N. Ba and N. T. Dan, Phys. Lett. A 136, 71 (1989).[5] X. S. Li, D. L. Lin, and T. George, Phys. Rev. B 41, 3280 (1990).[6] I. Gonzalo, M. A. Antón, and J. L. Escudero, IEEE J. Quantum Electron. 28, 765 (1992).[7] M. A. Antón and I. Gonzalo, IEEE J. Quantum Electron. 31, 1088 (1995).[8] O. G. Calderón and I. Gonzalo, Opt. Commun. 125, 369 (1996).[9] M. Brambilla, M. Cateneo, L. A. Lugiato, R. Pirovano, F. Prati, A. J. Kent, G. L. Oppo, A. B. Coates, C. O. Weiss, C. Green, E. J. D’Angelo, and J. R. Tredicce, Phys. Rev. A 49, 1427 (1994).[10] A. B. Coates, C. O. Weiss, C. Green, E. J. D’Angelo, J. R. Tredicce, M. Brambilla, M. Cataneo, L. A. Lugiato, R. Pirovano, F. Prati, A. J. Kent, and G. L. Oppo, Phys. Rev. A 49, 1452 (1994).[11] F. Prati, M. Brambilla, and L. A. Lugiato, Riv. Nuovo Cimento 17, 1 (1994).[12] O. G. Calderón, V. M. Pérez-García, I. Martín, and J. M. Guerra, Phys. Rev. A 53, 3490 (1996).[13] V. M. Pérez-García and J. M. Guerra, Phys. Rev. A 50, 1646 (1994).[14] V. M. Pérez-García, I. Pastor, and J. M. Guerra, Phys. Rev. A 52, 2392 (1995).[15] A. C. Newell and J. V. Moloney, Nonlinear Optics (Addison Wesley, Redwood City, CA, 1992).[16] P. Coullet, L. Gil, and F. Rocca, Opt. Commun. 73, 403 (1989).[17] P. K. Jakobsen, J. V. Moloney, A. C. Newell, and R. Indik, Phys. Rev. A 45, 8129 (1992).[18] P. K. Jakobsen, J. Lega, Q. Feng, M. Staley, J. V. Moloney, and A. C. Newell, Phys. Rev. A 49, 4189 (1994).[19] J. Lega, P. K. Jakobsen, J. V. Moloney, and A. C. Newell, Phys. Rev. A 49, 4201 (1994).[20] O. G. Calderón, V. M. Pérez-García, J. Lega, and J. M. Guerra, Opt. Commun. 1443, 315 (1997).[21] B. P. Antoniuk, Zh. Éksp. Teor. Fiz. 80, 2221 (1981) [Sov. Phys. JETP 53, 1159 (1981)].[22] D. Pines, Elementary Excitations in Solids (Benjamin, New York, 1964).[23] D. B. Fitchen, in Physics of Color Centers, edited by W. B. Fowler (Academic, New York, 1968).[24] H. Haken, Light Vol. 2: Laser Light Dynamics (North-Holland, Amsterdam, 1985).[25] N. C. Kothari and Takayoshi Kobayashi, IEEE J. Quantum Electron. 20, 418 (1984). NO © 1998 The American Physical Society. We are very grateful to J. M. Guerra for his helpful advice. This work was supported by the DGICYT Project No. PB95-0389 (Spain). NO Ministerio de Economía y Competitividad (MINECO), España DS Docta Complutense RD 3 may 2024