Automated tuning and channel selection for cascaded micro-ring resonators

Hattink, Maarten; Zhu, Ziyi; Bergman, Keren

doi:10.1117/12.2546471

Cited by 2 publications

(3 citation statements)

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“…The monitor senses the operating state of the photonic devices. Various techniques have been proposed in the literature: (1) on-chip photodetectors (PDs) to monitor the light intensity at the output ports [25][26][27][28][29][30] ; (2) on-chip temperature sensor [31][32][33] ; (3) in-resonator photoconductive heaters (IRPHs) to monitor the light intensity in the waveguide [34][35][36] ; (4) Contact less integrated photonic probe (CLIPP) to measure the light-intensity-dependent change of waveguide's electrical conductivity [37][38][39] .…”

Section: Monitormentioning

confidence: 99%

“…So far, most controllers in thermo-optic feedback tuning are implemented using board-level circuits, especially those with multiple photonic devices [26,29,30,[40][41][42] . A few recent designs with a single photonic device have integrated controllers [43][44][45][46][47] .…”

Section: Controllermentioning

confidence: 99%

“…For single photonic device applications, there are some basic algorithms, e.g., dithering [48] , locking to maximum or minimum [26,29] , locking to reference [44,45,47,49] , and so on. In the dithering approach, a small dithering signal is applied thermally to the device, resulting in a small modulation of the output optical signal.…”

Section: Controllermentioning

confidence: 99%

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Towards electronic-photonic-converged thermo-optic feedback tuning

Tan¹,

Ye²,

Ming³

et al. 2021

J. Semicond.

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As Moore’s law approaching its end, electronics is hitting its power, bandwidth, and capacity limits. Photonics is able to overcome the performance limits of electronics but lacks practical photonic register and flexible control. Combining electronics and photonics provides the best of both worlds and is widely regarded as an important post-Moore’s direction. For stability and dynamic operations considerations, feedback tuning of photonic devices is required. For silicon photonics, the thermo-optic effect is the most frequently used tuning mechanism due to the advantages of high efficiency and low loss. However, it brings new design requirements, creating new design challenges. Emerging applications, such as optical phased array, optical switches, and optical neural networks, employ a large number of photonic devices, making PCB tuning solutions no longer suitable. Electronic-photonic-converged solutions with compact footprints will play an important role in system scalability. In this paper, we present a unified model for thermo-optic feedback tuning that can be specialized to different applications, review its recent advances, and discuss its future trends.

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