Tech Briefs Magazine - September 2022 - PIT-12

TECHNOLOGY LEADERS Optics
Excess
Loss [dB]
2.0
1.5
1.0
0.5
0.0
180 175 170 165 160 155
Vertical Gap [nm]
2.890
2.885
2.880
2.875
2.870
2.865
2.860
Effective
Index
0.12
0.11
0.10
0.09
0.08
0.07
0.06
Excess
Loss [dB]
2.0
180
175
170
165
160
155
Vertical Gap [nm]
ΔΦ/π
Los [dB]
1.5
0.10
1.0
0.09
0.5
0.08
0.07
0.0
6 8 10 12 14 16 18 20 22
Actuation Voltage at Inner Electrode Pair [V]
Phase
Shift [π]
Figure 4. Optical simulation (left) established the vertical distance between the coupler and waveguide that would result in a desired phase shift in the optical signal.
Electromechanical simulation (right) determined the voltage that, when applied to the MEMS mechanism, would move the coupler waveguide to the desired distance
away from the bus. (Images courtesy EPFL and licensed under CC BY 4.0)
surface micromachined manufacturing
processes, and occupies a total footprint
of just 60 µm × 44 µm. Now that they
have an established proof of concept,
Sattari and his colleagues look forward
to seeing their designs integrated into
the world's optical data networks. " We
are creating building blocks for the future,
and it will be rewarding to see their
potential become a reality, " says Sattari.
This article was written by Alan Petrillo,
COMSOL. For more information, visit
https://www.comsol.com.
No license limit.
No calculation limit.
No speed limit.
References
1. H. Sattari et al., " Silicon Photonic MEMS
Phase-Shifter, " Optics Express, vol. 27, no. 13, pp.
18959-18969, 2019.
2. T.J. Seok et al., " Large-scale broadband digital silicon
photonic switches with vertical adiabatic couplers, "
Optica, vol. 3, no. 1, pp. 64-70, 2016.
0.11
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12
Photonics & Imaging Technology, September 2022
Phase Shift [π]
Vertical Gap [nm]

https://www.comsol.com http://info.hotims.com/82325-834

Tech Briefs Magazine - September 2022

Table of Contents for the Digital Edition of Tech Briefs Magazine - September 2022

Tech Briefs Magazine - September 2022 - Intro
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