Thermal Eigenmode Decomposition (TED) is introduced as a technique to cancel the e ect of thermal cross-talk in photonic integrated circuits (PICs). This original technique, bene ts from adopting eigen-solution of phase coupled system, allowing for an e cient tuning of the structure. This novel tuning scheme is exploited for a recon gurable lter made of Mach-Zehnder interferometer (MZI) loaded by two Microring resonators (MRRs) and a mesh of MRRs. Through numerical simulation and experimental tests, e ectiveness of suggested technique is validated. For a MZI loaded by 2 MRRs, it is demonstrated that not only ne-tuned condition of the lter is achieved from random perturbations, but also the bandwidth is adapted to the channel spectrum. Via introduction of relevant goal functions, routing functionality in mesh of 4 MRRs, adopting the TED-based scheme is validated. This method has the capability of extension to di erent photonic integrated circuits and platforms.
La decomposizione termica in autostati (TED) viene introdotta come tecnica per annullare l'e etto del cross-talk termico nei circuiti integrati fotonici (PIC). Questa tecnica originale sfrutta le autofunzioni dei sistemi accoppiati in fase, consentendo un' e ciente messa a punto della struttura. Questo nuovo schema di ottimizzazione e utilizzato per un ltro ricon gurabile costituito da un interferometro Mach-Zehnder (MZI) caricato con due risonatori ad anello (MRR) ed una mesh di MRR. Attraverso simulazioni numeriche e test sperimentali, e provata l'e cacia della tecnica suggerita. Per un MZI caricato con 2 MRR, non solo e dimostrato che e possibile ottenere un tuning ne del ltro per perturbazioni casuali, ma anche la larghezza di banda e adattata allo spettro del canale. Tramite l'introduzione di speci che funzioni-obiettivo nello schema basato su TED viene veri cata la funzionalit di routing in mesh di 4 MRR. Questo metodo ha la capacit di poter essere esteso a vari circuiti fotonici integrati, anche basati su diverse tecnologie.
A tuning method for photonic integrated circuits in presence of thermal cross-talk
AHMADI, SARA
2017/2018
Abstract
Thermal Eigenmode Decomposition (TED) is introduced as a technique to cancel the e ect of thermal cross-talk in photonic integrated circuits (PICs). This original technique, bene ts from adopting eigen-solution of phase coupled system, allowing for an e cient tuning of the structure. This novel tuning scheme is exploited for a recon gurable lter made of Mach-Zehnder interferometer (MZI) loaded by two Microring resonators (MRRs) and a mesh of MRRs. Through numerical simulation and experimental tests, e ectiveness of suggested technique is validated. For a MZI loaded by 2 MRRs, it is demonstrated that not only ne-tuned condition of the lter is achieved from random perturbations, but also the bandwidth is adapted to the channel spectrum. Via introduction of relevant goal functions, routing functionality in mesh of 4 MRRs, adopting the TED-based scheme is validated. This method has the capability of extension to di erent photonic integrated circuits and platforms.File | Dimensione | Formato | |
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https://hdl.handle.net/10589/142967