Abstract

This paper demonstrates the possibility of automatically stabilizing the working condition of an integrated Silicon Photonics microring modulator with a novel dithering-based control scheme. The proposed feedback strategy leverages a real-time acquisition of the modulator non-linear transfer function (TF) and operates by setting the target locking point to the zero of the TF second derivative, i.e. where the ring slope is maximum. This results in a control algorithm that is both power-independent and calibration-free. The paper shows that the operating point identified in this way has a negligible difference with respect to the optimum working condition of minimum Transmitter Penalty normally targeted and that the employed dithering signal does not affect the modulation quality. The control performances, made possible by an FPGA-based platform ensuring a 30 ms response time, are assessed in a 50 Gbit/s routing scenario, demonstrating effective compensation of wavelength and thermal variations and successful transmission even in demanding environments.

240  Gb/s optical transmission based on an ultrafast silicon microring modulator

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Efficient 330-Gb/s PAM-8 modulation using silicon microring modulators

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Temperature and wavelength drift tolerant WDM transmission and routing in on-chip silicon photonic interconnects

Ioannis Roumpos, Themistoklis Chrysostomidis, Vittorio Grimaldi, Francesco Zanetto, Fabio Toso, Peter De Heyn, Yoojin Ban, Joris Van Campenhout, Giorgio Ferrari, Marco Sampietro, Francesco Morichetti, Andrea Melloni, Theonitsa Alexoudi, Nikos Pleros, Miltiadis Moralis-Pegios, and Konstantinos Vyrsokinos
Opt. Express 30(15) 26628-26638 (2022)

Thermal stabilization of a microring modulator using feedback control

Kishore Padmaraju, Johnnie Chan, Long Chen, Michal Lipson, and Keren Bergman
Opt. Express 20(27) 27999-28008 (2012)

Silicon electronic–photonic integrated 25  Gb/s ring modulator transmitter with a built-in temperature controller

Minkyu Kim, Min-Hyeong Kim, Youngkwan Jo, Hyun-Kyu Kim, Stefan Lischke, Christian Mai, Lars Zimmermann, and Woo-Young Choi
Photon. Res. 9(4) 507-513 (2021)