Square-wave switching in vertical-cavity surface-emitting lasers with polarization-rotated optical feedback: Experiments and simulations
| Autor: | Athanasios Gavrielides, Brenton Pope, David W. Sukow, M.S. Torre, Cristina Masoller, Taylor Gilfillan |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya. DONLL - Dinàmica no Lineal, Òptica no Lineal i Làsers |
| Rok vydání: | 2012 |
| Předmět: |
Semiconductor lasers
Physics Enginyeria electrònica::Optoelectrònica::Làser [Àrees temàtiques de la UPC] Sistemes de comunicació per làser Laser communication systems business.industry Physics::Optics Square wave Polarization (waves) Laser Atomic and Molecular Physics and Optics Vertical-cavity surface-emitting laser Semiconductor laser theory law.invention Optics law Làsers de semiconductors business Lasing threshold Noise strength Delay time |
| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya instname UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| ISSN: | 1094-1622 1050-2947 |
| DOI: | 10.1103/physreva.86.033818 |
| Popis: | We study experimentally the dynamics of vertical-cavity surface-emitting lasers (VCSELs) with polarization-rotated (PR) optical feedback, such that the natural lasing polarization of a VCSEL is rotated by 90 deg and then is reinjected into the laser. We observe noisy, square-wave-like polarization switchings with periodicity slightly longer than twice the delay time, which degrade to (or alternate with) bursts of irregular oscillations. We present results of simulations that are in good agreement with the observations. The simulations demonstrate that close to threshold the regular switching is very sensitive to noise, while well above threshold is less affected by the noise strength. The frequency splitting between the two polarizations plays a key role in the switching regularity, and we identify wide parameter regions where deterministic and robust switching can be observed. |
| Databáze: | OpenAIRE |
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