Traveling kinks in homogeneously broadened lasers with intracavity parametric amplification
Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
Accepted: 17 December 1996
A complex order parameter equation describing the nonlinear dynamics near threshold of a homogeneously broadened class-A ring laser with an intracavity parametric amplifier is derived starting from the multimode Maxwell-Bloch laser equations in the limit of a very large cavity length. It is shown that, when the parametric amplifier is turned on, traveling kink pulses may stably propagate in the cavity. These localized structures bear an interesting analogy with Bloch domain walls in ferromagnets.
PACS: 42.65.Sf – Dynamics of nonlinear optical systems; optical instabilities, optical chaos, and optical spatio-temporal dynamics / 42.65.Ky – Harmonic generation, frequency conversion / 75.60.Ch – Domain walls and domain structure
© EDP Sciences, 1997