Coherent coupling of multiple transverse modes in quantum cascade lasers

Coherent coupling of multiple transverse modes in quantum cascade lasers

Quantum cascade lasers are a unique laboratory for studying nonlinear laser dynamics because of their high intracavity intensity, strong intersubband optical nonlinearity, and an unusual combination of relaxation time scales. Here we investigate the nonlinear coupling between the transverse modes of...

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Veröffentlicht in:Physical review letters 2009-01, Vol.102 (1), p.013901-013901, Article 013901
Hauptverfasser: Yu, Nanfang, Diehl, Laurent, Cubukcu, Ertugrul, Bour, David, Corzine, Scott, Höfler, Gloria, Wojcik, Aleksander K, Crozier, Kenneth B, Belyanin, Alexey, Capasso, Federico
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container_issue 1
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container_title Physical review letters
container_volume 102
creator Yu, Nanfang
Diehl, Laurent
Cubukcu, Ertugrul
Bour, David
Corzine, Scott
Höfler, Gloria
Wojcik, Aleksander K
Crozier, Kenneth B
Belyanin, Alexey
Capasso, Federico
description Quantum cascade lasers are a unique laboratory for studying nonlinear laser dynamics because of their high intracavity intensity, strong intersubband optical nonlinearity, and an unusual combination of relaxation time scales. Here we investigate the nonlinear coupling between the transverse modes of quantum cascade lasers. We present evidence for stable phase coherence of multiple transverse modes over a large range of injection currents. We explain the phase coherence by a four-wave mixing interaction originating from the strong optical nonlinearity of the gain transition. The phase-locking conditions predicted by theory are supported by spectral data and both near- and far-field mode measurements.
doi_str_mv 10.1103/PhysRevLett.102.013901
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title Coherent coupling of multiple transverse modes in quantum cascade lasers
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