Permanent phase correction in a polarization diversity Si PIC by femtosecond laser pulses

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DOIResolve DOI: http://doi.org/10.1109/LPT.2015.2444394
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TypeArticle
Journal titleIEEE Photonics Technology Letters
ISSN1041-1135
1941-0174
Volume27
Issue17
Pages18801883
Subjectfemtosecond laser tuning; silicon photonics; DPSK demodulator; polarization diversity
AbstractWe report a fast and efficient method for permanently correcting fabrication-induced phase errors in silicon photonic circuits. The method uses femtosecond laser pulses at 400-nm wavelength to amorphize a thin layer of crystalline silicon near the waveguide surface, thereby inducing a change in the effective index of the waveguide. Using a single femtosecond laser pulse, we reduced the polarization-dependent frequency shift between the two interferometers of a polarization diversity differential phase shift keying silicon demodulator from 11 GHz to less than 0.5 GHz, thereby restoring the polarization diversity operation of the circuit with little degradation to the circuit performance.
Publication date
PublisherIEEE
LanguageEnglish
AffiliationNational Research Council Canada
Peer reviewedYes
NPARC number23001581
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Record identifier82db6ca9-6458-4fc7-8f55-7c3891d56f23
Record created2017-03-08
Record modified2017-03-08
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