Title :
Cross-polarization generation and its impact on coupler performance
Author :
Wang, Tairan ; Khan, M. Jalal ; Viens, Jeff ; Lim, Mike ; Fried, Dale ; Foresi, Jim ; Ulu, Gokhan ; Agarwal, Anu
Author_Institution :
Clarendon Photonics Inc., Newton, MA
Abstract :
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
Keywords :
integrated optics; light polarisation; optical directional couplers; optical waveguides; cross-polarization generation; directional coupler; extinction ratio; integrated optics; polarization rotation; waveguide asymmetries; Coupling circuits; Directional couplers; Extinction ratio; Optical attenuators; Optical coupling; Optical filters; Optical interferometry; Optical polarization; Optical waveguides; Photonics; Directional coupler; integrated photonics; polarization;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2006.876334
