Publication Type : Journal Article
Publisher : Journal of the Optical Society of America B
Source : Journal of the Optical Society of America B, 40, 1054-1062 (2023) DOI: https://doi.org/10.1364/JOSAB.482467
Url : https://opg.optica.org/josab/abstract.cfm?uri=josab-40-5-1054
Campus : Amritapuri
School : School for Sustainable Futures
Department : Electronics and Communication
Year : 2023
Abstract : Field programmable photonic gate arrays (FPPGAs) use 2×2 tunable basic units (TBUs) interconnected as a mesh to achieve various functionalities on the same chip. It is desirable to have TBUs that can retain the state without power and function over a broad bandwidth. Different TBU structures and materials are compared in this work to design a suitable nonvolatile broadband device. An optical phase change material (O-PCM) based Mach–Zehnder interferometer provided the required nonvolatile TBU with a high bandwidth, low insertion loss, and low crosstalk. Among the various O-PCM materials, Sb2S3 provided the lowest insertion loss of <1dB and a low crosstalk of <−25dB. The proposed TBU can enable a low-power FPPGA with a smaller footprint and broader bandwidth compared to their volatile thermo-optic or electro-optic counterparts.
Cite this Research Publication : Govindan Nishi Nampoothiri and Viswas Sadasivan, "Broadband tunable basic units for nonvolatile field programmable photonic gate array," Journal of the Optical Society of America B, 40, 1054-1062 (2023) DOI: https://doi.org/10.1364/JOSAB.482467