Welcome to the Integrated OptoElectronics Group (IOER), where our dedication lies in advancing the field of photonic integrated circuits (PICs). Our primary focus is on exploring advanced design approaches and unlocking the vast potential of PICs in various domains, including optical communications, optical signal processing and computing, optical I/O chiplets, photonic design automation, integrated photonic sensors, and integrated lidar systems.
Research Topics
Selected Recent Publications
This work demonstrates an efficient and ultra-compact solution of mode multiplexer on silicon for few-mode fibers. Eight spatial modes can be selectively excited including LP01, LP11a, LP11b and LP21b in the two orthogonal polarizations, with experimental chip-to-fiber peak coupling efficiencies all above −5.5 dB. The demonstrated design is very compact with a total on-chip footprint of <35×35 µm².
, "Ultra-compact and efficient integrated multichannel mode multiplexer in silicon for few-mode fibers", Laser Photonics Rev 18, 2300460. 2024.
Leveraging photonic integration and photonic computing acceleration, we proposed and demonstrated a scalable integrated silicon photonic processor that enables high-capacity optical fiber communications using various fiber spatial modes.
, "Empowering high-dimensional optical fiber communications with integrated photonic processors", Nature Communications, 15, 3515, 2024.
This work demonstrates the use of a bi-level optimization algorithm to address the fabrication-constrained inverse design. A precise gradient of a desired figure of merit can be obtained, thereby eliminating the need for gradient estimation with robust convergence properties. We validate our method through optimization tasks for various photonic integrated components. The optimized designs are also fabricated and characterized in the experiment.
, "Always-Feasible Photonic Inverse Design with a Differentiable Conditional Design Generator", ACS Photonics, 2024.
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