Large-Scale Crosstalk-Corrected Thermo-Optic Phase Shifter Arrays in Silicon Photonics

We introduce a thermo-optic phase shifter (TOPS) array architecture with independent phase control of each phase shifter for large-scale and high-density photonic integrated circuits with two different control schemes: pulse amplitude modulation (PAM) and pulse width modulation (PWM). We realize a c...

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Bibliographic Details
Published in:IEEE journal of selected topics in quantum electronics 2022-11, Vol.28 (6: High Density Integr. Multipurpose Photon. Circ.), p.1-9
Main Authors: Gurses, B. Volkan, Fatemi, Reza, Khachaturian, Aroutin, Hajimiri, Ali
Format: Article
Language:English
Subjects:
Algorithms
Arrays
Crosstalk
Density
Finite difference method
Heat sinks
Heating systems
Integrated circuits
integrated optoelectronics
large-scale circuits
Optical phase shifters
Optical variables control
Phase control
Phase shifters
Phased arrays
Photonics
Pulse amplitude modulation
Pulse duration modulation
silicon
Substrates
thermo-optic effects
time division multiplexing
Waveforms
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Summary:We introduce a thermo-optic phase shifter (TOPS) array architecture with independent phase control of each phase shifter for large-scale and high-density photonic integrated circuits with two different control schemes: pulse amplitude modulation (PAM) and pulse width modulation (PWM). We realize a compact spiral TOPS and a 288-element high-density row-column TOPS array with this architecture and drive TOPS with waveforms of both control schemes and of different array sizes. We present a thermal excitation model and a finite difference method-based simulation to simulate large-scale TOPS arrays and compare both schemes experimentally and theoretically. We also analyze the effects of thermal crosstalk in the realized TOPS array and implement a thermal crosstalk correction algorithm with the developed model. The high-density TOPS array architecture and the thermal crosstalk correction algorithm pave the way for high-density TOPS arrays with independent phase control in large-scale photonic integrated circuits interfaced with electronics limited in voltage swing and bandwidth.
ISSN:1077-260X
1558-4542
DOI:10.1109/JSTQE.2022.3189965