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Coupled-cavity vertical-emitting semiconductor laser for continuous-wave terahertz emission

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5 Author(s)
Chusseau, L. ; Centre d''Electronique et de Microoptoelectronique de Montpellier, Univ. Montpellier II, France ; Almuneau, G. ; Coldren, L.A. ; Huntington, A.
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A coupled-cavity vertical-emitting semiconductor laser is built. It intrinsically allows the beating of two longitudinal modes owing to a weak coupling between the matched optical cavities. Terahertz electromagnetic waves have to be produced by external photomixing. First, analytical analysis enables design rules to be applied for such a purpose. Secondly, the fabrication and characterisation of a coupled-cavity VCSEL operating at 980 nm is described. The fabricated device shows a low laser threshold and exhibits the coupling between both cavities, although continuous-wave terahertz two-mode beating has not yet been observed

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Optoelectronics, IEE Proceedings -  (Volume:149 ,  Issue: 3 )