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Ultracompact polarization converter with a dual subwavelength trench built in a silicon-on-insulator waveguide

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Villafranca Velasco, Aitor and Calvo Padilla, María Luisa and Cheben, Pavel and Ortega Moñux, Alejandro and Alonso Ramos, Carlos Alberto and Molina fernández, Íñigo and Lapointe, Jean and Vachon, Martin and Janz, Siegfried and Xu, Dan-Xia (2012) Ultracompact polarization converter with a dual subwavelength trench built in a silicon-on-insulator waveguide. Optics Letters, 37 (3). pp. 365-367. ISSN 0146-9592

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Official URL: http://dx.doi.org/10.1364/OL.37.000365


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Abstract

The design and fabrication of an ultracompact silicon-on-insulator polarization converter is reported. The polarization conversion with an extinction ratio of 16 dB is achieved for a conversion length of only 10 mu m. Polarization rotation is achieved by inducing a vertical asymmetry by forming in the waveguide core two subwavelength trenches of different depths. By taking advantage of the calibrated reactive ion etch lag, the two depths are implemented using a single mask and etching process. The measured converter loss is -0.7 dB and the 3 dB bandwidth is 26 nm.


Item Type:Article
Additional Information:

© 2012 Optical Society of America.
Financial support from the Spanish Ministry of Science and Innovation (MICINN) is acknowledged under grants TEC2008-04105 and TEC2009-10152.

Uncontrolled Keywords:Mode Converter, Rotator, Efficient
Subjects:Sciences > Physics > Optics
ID Code:25366
Deposited On:14 May 2014 07:59
Last Modified:14 May 2014 07:59

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