NB-Photonics Seminar with prof. Niels Quack

What: NB-Photonics seminar with prof. Niels Quack on “Optical Switching with Silicon Photonic MEMS”.

When: Friday 2nd December 2016, 11.30 to 13.00

Where: Auditorium 1 (1st floor), iGent, Campus Ardoyen – Zwijnaarde

** Registration is free but mandatory via this link **

11.30 – 11.35: Introduction by prof. Roel Baets
11.35 – 12.20: Seminar by prof. Niels Quack
12.20 – 12.30: Discussion
12.30 – 13.00: Sandwich Lunch

Biosketch of speaker

prof. Niels Quack

 Niels Quack received his MS from Ecole Polytechnique Fédérale de Lausanne (EPFL), and his PhD from Eidgenössische Technische Hochschule Zürich (ETH), 2005 and 2009, respectively. From 2011 to 2015 he was Postdoctoral Researcher and Visiting Scholar at University of California, Berkeley, within the Integrated Photonics Laboratory at the Berkeley Sensor and Actuator Center. From 2014 to 2015 he was Senior MEMS Engineer at sercalo Microtechnology. In June 2015, he was awarded a Swiss National Science Foundation Professorship at EPFL. Research interests include MEMS, Optical MEMS, Tunable Optical Microsystems, Optomechanical Oscillators, Silicon Photonics, Heterogeneous Integration, LIDAR, Diamond Photonics. He has authored and co-authored more than 30 papers in leading technical journals and conferences and is a Senior Member of IEEE.


Optical Switching with Silicon Photonic MEMS

Fiber-optical communication systems rely on optical switches to efficiently route optical signals. The prevalent solutions today are based on Micro-Electro-Mechanical Systems (MEMS) tilting mirrors. Emerging integrated photonics technologies such as silicon photonics have recently spurred interest for further miniaturization, promising both performance and cost advantages. Using mechanical movement for the switching mechanism in silicon photonic MEMS switches can provide several advantages, such as scalability to high port counts, microsecond reconfiguration time, and low losses at the same time.
In this talk, we will review the silicon photonic MEMS switches developed at UC Berkeley. Several generations of switches have been designed, fabricated and characterized, including a 50 x 50 switch based on movable directional couplers [1] and a 64 x 64 digital silicon photonic MEMS switch based on movable adiabatic couplers [2]. We will discuss design, scaling and performance of silicon photonic MEMS switches, and we will address the strategies employed for optical and electrical interfacing.
In particular, we have shown, that the electrical interfacing can be achieved either by using a row/column actuation method [3], or by high density interconnects using flip-chip bonding to an interposer [4]. We have further shown, that the mechanical switching is reliable for >10 billion cycles [5], that silicon photonic MEMS switches can be fabricated in a standard silicon photonics foundry process (IMEC ISIPP25G) [6], and that advanced design and fabrication schemes provide a path to reduce overall losses and polarization dependent losses [7], paving the way for highly integrated chip-scale, high port count, fast optical switches based on silicon photonic MEMS.
[1] S. Han, T. J. Seok, N. Quack, B.-W. Yoo, and M. C. Wu, “Large-scale silicon photonic switches with movable directional couplers”, Optica, 2, 4, pp. 370-375, 2015.
[2] T. J. Seok, N. Quack, S. Han, R. S. Muller and M. C. Wu, “Large-scale broadband digital silicon photonic switches with vertical adiabatic couplers”, Optica, 3, 1, pp. 64-70, 2016.
[3] N. Quack, T. J. Seok, S. Han, R. S. Muller, M. C. Wu, “Scalable Row/Column Addressing of Silicon Photonic MEMS Switches”, IEEE Photonics Technology Letters, vol. 28, num. 5, p. 561-564, 2016.
[4] T. J. Seok, H. Y. Hwang, J. S. Lee, A. Forencich, H. Grant, D. Knutson, N. Quack, S. Han, R. S. Muller, L. Carroll, G. Papen, P. O’Brien, and M. C. Wu, “12×12 Packaged Digital Silicon Photonic MEMS Switches”, IEEE Photonics Conference, Waikoloa, Hawaii, 2 – 6 October 2016.
[5] T. J. Seok, N. Quack, S. Han, W. Zhang, R. S. Muller, and M. C. Wu, “Reliability Study of Digital Silicon Photonic MEMS Switches”, 12th International Conference on Group IV Photonics, August 24-28 2015, Vancouver, Canada.
[6] J. Jacobs, T. Graziosi, M. Kiss, S. Han, T. J. Seok, M. C. Wu, N. Quack, “Die Level Release of Silicon Photonic MEMS”, International Conference on Optical MEMS and Nanophotonics (IEEE OMN), 31 July – 04 August 2016.
[7] S. Han, T. J. Seok, K. Yu, N. Quack, R. S. Muller, M. C. Wu, “50×50 Polarization-Insensitive Silicon Photonic MEMS Switches: Design and Experiment”, 42nd European Conference and Exhibition on Optical Communication (ECOC), Düsseldorf, Germany, 18 – 22 September 2016 (Postdeadline Paper).