Temperature-independent silicon waveguides comprising bridged subwavelength gratings

M. Ibrahim; A. Aleali; J. H. Schmid; P. Cheben; J. Lapointe; S. Janz; P. J. Bock; A. Densmore; B. Lamontagne; R. Ma; D.-X. Xu; W. N. Ye

doi:10.1117/12.2001480

24 October 2012 Temperature-independent silicon waveguides comprising bridged subwavelength gratings

M. Ibrahim, A. Aleali, J. H. Schmid, P. Cheben, J. Lapointe, S. Janz, P. J. Bock, A. Densmore, B. Lamontagne, R. Ma, D.-X. Xu, W. N. Ye

Author Affiliations +

Proceedings Volume 8412, Photonics North 2012; 84120Z (2012) https://doi.org/10.1117/12.2001480
Event: Photonics North 2012, 2012, Montréal, Canada

Abstract

Athermal operation of silicon waveguides for the TM and TE mode is achieved using the bridged subwavelength grating (BSWG) waveguide geometry. For the TM mode the experimental results show that the temperature-induced wavelength shift (dλ/dT) is an order of magnitude smaller for the BSWG waveguides with grating duty cycle, waveguide and bridge widths of 42%, 490 nm and 220 nm, respectively, as compared to standard photonics wires (PW). For the TE mode similar results are achieved by using the bridge width of 200 nm and similar duty cycle and waveguide width. A temperature-induced shift of only -2.5 pm/°C is reported for the TM polarized light. Propagation losses of BSWG waveguides for both polarizations were measured to be about 8 dB/cm, comparable to that of PWs.

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M. Ibrahim, A. Aleali, J. H. Schmid, P. Cheben, J. Lapointe, S. Janz, P. J. Bock, A. Densmore, B. Lamontagne, R. Ma, D.-X. Xu, and W. N. Ye "Temperature-independent silicon waveguides comprising bridged subwavelength gratings", Proc. SPIE 8412, Photonics North 2012, 84120Z (24 October 2012); https://doi.org/10.1117/12.2001480

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