A general approach for robust integrated polarization rotators

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DOIResolve DOI: http://doi.org/10.1117/12.2016845
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TypeArticle
Proceedings titleProceedings of SPIE - The International Society for Optical Engineering
ConferenceIntegrated Optics: Physics and Simulations, 17 April 2013 through 18 April 2013, Prague
ISSN0277-786X
ISBN9780819495839
Volume8781
Article number878109
SubjectAnalytical conditions; Conventional approach; Fabrication tolerances; Polarization diversity; Polarization phase; Polarization rotation; Polarization rotator; Thermooptic effects; Errors; Fabrication; Integrated optics; Light extinction; Optical communication; Phase shift; Phase shifters; Polarization
AbstractIntegrated polarization rotators suffer from very high sensitivity to fabrication errors. A polarization rotator scheme that substantially increases fabrication tolerances is proposed. In the proposed scheme, two tunable polarization phase shifters are used to connect three rotator waveguide sections. By means of properly setting the polarization phase shifters, fabrication errors are compensated and perfect polarization rotation is achieved. Analytical conditions are shown that determine the maximum deviation that can be corrected with the proposed scheme. A design example is discussed, where the thermo-optic effect is used to provide the required tunable polarization phase shifting. Calculated 40dB extinction ratio is shown in presence of fabrication errors that would yield a 4dB extinction ratio in the conventional approach.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); Information and Communication Technologies
Peer reviewedYes
NPARC number21269805
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Record identifier4fcc02bb-3873-4535-af42-deed789f040e
Record created2013-12-13
Record modified2016-05-09
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