Phys. Rev. A 72, 033811 (2005) [7 pages]Effects of injected atomic coherence in broad-area lasersReceived 25 May 2005; published 14 September 2005 We analyze the effect of injected atomic coherence on transverse patterns of a broad area laser by means of the semiclassical two-level Maxwell-Bloch equations. A single longitudinal mode is considered. The injected atomic coherence forces a spatially homogeneous profile to appear and locks the field phase to a single value. Above a pump threshold value a very rich scenario of patterns is developed. Near threshold we find stationary patterns such as rhombic and hexagonal lattices. Well above threshold nonstationary patterns such as complex highly ordered vortex lattices traveling along the cross section, and nearly traveling waves appear. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.72.033811
DOI:
10.1103/PhysRevA.72.033811
PACS:
42.65.Sf, 42.60.Jf, 42.50.Gy
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