Cross-polarization generation and its impact on coupler performance

Cross-polarization generation and its impact on coupler performance

In high index contrast integrated optic waveguides, it has been found that waveguide asymmetries can produce cross-polarization coupling. This effect has been well studied for polarization rotation. A similar effect, as produced by fabrication-induced asymmetry, can significantly limit the performan...

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Veröffentlicht in:IEEE journal of selected topics in quantum electronics 2006-07, Vol.12 (4), p.751-759
Hauptverfasser: Tairan Wang, Khan, M.J., Viens, J., Lim, M., Fried, D., Foresi, J., Ulu, G., Agarwal, A.
Format: Artikel
Sprache:eng
Schlagworte:
Asymmetry
Coupling circuits
Directional coupler
Directional couplers
Extinction
Extinction ratio
integrated photonics
Joining
Noise levels
Optical attenuators
Optical coupling
Optical filters
Optical interferometry
Optical polarization
Optical waveguides
Photonics
Polarization
Quantum electronics
Waveguides
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Beschreibung
Zusammenfassung:In high index contrast integrated optic waveguides, it has been found that waveguide asymmetries can produce cross-polarization coupling. This effect has been well studied for polarization rotation. A similar effect, as produced by fabrication-induced asymmetry, can significantly limit the performance of directional couplers. In this paper, we analyze the effect, propose a method to circumvent these manufacturing-related limitations, and demonstrate an improvement of the extinction ratio from 25 to 40 dB level
ISSN:1077-260X
1558-4542
DOI:10.1109/JSTQE.2006.876334