Gómez Calderón, ÓscarCabrera Granado, EduardoAntón Revilla, Miguel ÁngelGonzalo Fonrodona, IsabelCarreño Sánchez, FernandoGuerra, J. M.2023-06-202023-06-202004-04-23[1] P. Coullet, L. Gil, and F. Rocca, Opt. Commun. 73, 403 (1989). [2] P. K. Jakobsen et al., Phys. Rev. A 45, 8129 (1992). [3] F.T. Arecchi et al., Phys. Rev. Lett. 70, 2277 (1993). [4] F. Prati, M. Brambilla, and L. A. Lugiato, Riv. Nuovo Cimento 17, 1 (1994). [5] P. K. Jakobsen et al., Phys. Rev. A 49, 4189 (1994). [6] G. Huyet et al., Phys. Rev. Lett. 75, 4027 (1995). [7] F. Encinas-Sanz, I. Leyva, and J.M. Guerra, Phys. Rev. Lett. 84, 883 (2000). [8] K. Staliunas, G. Slekys, and C.O.Weiss, Phys. Rev. Lett. 79, 2658 (1997). [9] S. P. Hegarty, G. Huyet, and J.G. McInerney, Phys. Rev. Lett. 82, 1434 (1999). [10] V. B. Taranenko and C.O. Weiss, IEEE J. Sel. Top. Quantum Electron. 8, 488 (2002). [11] S. Barland et al., Nature (London) 419, 699 (2002). [12] N. N. Rosanov, J. Opt. Soc. Am. B 7, 1057 (1990). [13] V. B. Taranenko, K. Staliunas, and C.O. Weiss, Phys. Rev. A 56, 1582 (1997). [14] R. Vilaseca et al., Phys. Rev. Lett. 87, 083902 (2001). [15] V. Ahufinger et al., Phs. Rev. Lett. 91, 083901 (2003). [16] M. Fleischhauer and S. F. Yelin, Phys. Rev. A 59, 2427 (1999). [17] O.G. Calderón et al., Phys. Rev. A 67, 043812 (2003). [18] C.W. Gardiner, Phys. Rev. Lett. 56, 1917 (1986). [19] D. F.Walls, Nature (London) 306, 141 (1983). [20] M. A.M. Marte and D. F. Walls, Phys. Rev. A 37, 1235 (1988). [21] M. A. Marte, H. Ritsch, and D. F Walls, Phys. Rev. Lett. 61, 1093 (1988). [22] M. Le Berre et al., J. Opt. B 1, 153 (1999). [23] G. L. Oppo, A. J. Scroggie, and W. J. Firth, J. Opt. B 1, 133 (1999). [24] M. Tlidi et al., Phys. Rev. A 61, 043806 (2000). [25] G. J. Valcá rcel and K. Staliunas, Phys. Rev. E 67, 026604 (2003). [26] K. Staliunas and V. J. Sánchez-Morcillo, Phys. Rev. A 57, 1454 (1998). [27] S. Trillo, M. Haelterman, and A. Sheppard, Opt. Lett. 22, 970 (1997). [28] V. B. Taranenko, K. Staliunas, and C.O.Weiss, Phys. Rev. Lett. 81, 2236 (1998).0031-900710.1103/PhysRevLett.92.163901https://hdl.handle.net/20.500.14352/51360© 2004 The American Physical Society. This work was supported by Project No. BFM2000-0796 (Spain). We are very grateful to M. Ritsch-Marte and J. Lega for their helpful advice.Phase domains and phase solitons in two-level amplifying media damped by a squeezed vacuum are predicted for the first time. Two different types of pattern formation are found depending on the relative value of the cavity detuning to the squeezed parameter: the usual one in lasers via a supercritical Hopf bifurcation and a new one via pitchfork bifurcation.engjournal articlehttp://dx.doi.org/10.1103/PhysRevLett.92.163901http://journals.aps.org/open access535Optical parametric oscillatorsLarge fresnel numberPattern-formationLocalized structuresSpatial solitonsDomain-wallsPump laserDynamicsSectionLightÓptica (Física)2209.19 Óptica Física