High performace silicon 2x2 optical switch based on a thermo-optically tunable multimode interference coupler and efficient electrodes

Optics Express
Álvaro RosaPablo Sanchis

Abstract

Optical switches based on tunable multimode interference (MMI) couplers can simultaneously reduce the footprint and increase the tolerance against fabrication deviations. Here, a compact 2x2 silicon switch based on a thermo-optically tunable MMI structure with a footprint of only 0.005mm<sup>2</sup> is proposed and demonstrated. The MMI structure has been optimized using a silica trench acting as a thermal isolator without introducing any substantial loss penalty or crosstalk degradation. Furthermore, the electrodes performance have significantly been improved via engineering the heater geometry and using two metallization steps. Thereby, a drastic power consumption reduction of around 90% has been demonstrated yielding to values as low as 24.9 mW. Furthermore, very fast switching times of only 1.19 µs have also been achieved.

References

Jul 23, 2007·Optics Express·Po DongMichal Lipson
Jun 25, 2009·Optics Express·Adam DensmorePavel Cheben
Dec 18, 2010·Optics Express·Po DongMehdi Asghari
Oct 15, 2011·Optics Express·Guoliang LiAshok V Krishnamoorthy
Mar 5, 2013·Optics Letters·Michael R WattsGregory N Nielson
Jun 13, 2014·Optics Express·Nicholas C HarrisChristophe Galland
Apr 4, 2015·Optics Express·Dessislava NikolovaKeren Bergman
Apr 4, 2015·Optics Express·Harish SubbaramanRay T Chen
May 15, 2015·Optics Express·Keijiro SuzukiHitoshi Kawashima

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Citations

Jan 15, 2021·Scientific Reports·Cao Dung TruongMinh Tuan Trinh

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