Stable polarization self-modulation in vertical-cavity surface-emitting lasers
1998; American Institute of Physics; Volume: 72; Issue: 19 Linguagem: Inglês
10.1063/1.121398
ISSN1520-8842
AutoresHua Li, Angela Hohl, Athanasios Gavrielides, Hong Q. Hou, Kent D. Choquette,
Tópico(s)Optical Network Technologies
ResumoThe characteristics of polarization self-modulation in a vertical-cavity surface-emitting laser (VCSEL) were studied for frequencies up to ≈9 GHz both experimentally and theoretically. Polarization self-modulation was obtained by rotating the linearly polarized output of the VCSEL by 90° and reinjecting it into the laser. Experimentally we simultaneously recorded time traces, optical and radio-frequency spectra. We found for increasing modulation frequencies that the output characteristics changed from square-wave to sinusoidal and the VCSEL system assumed new polarization eigenstates that are different from the free-running VCSEL eigenstates. We modeled polarization self-modulation as an interband process and found a good qualitative agreement between our experimental and numerical results.
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