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Creators/Authors contains: "Slaby, Joel B."

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  1. ; ; ; ; (, IEEE)
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  2. ; ; ; ; ; ; ; ; (, Optica Publishing Group)
    We report a simple, vacuum-compatible fiber attach process forin situstudy of grating-coupled photonic devices. The robustness of this technique is demonstrated on grating-coupled waveguides exposed to multiple X-ray irradiations for aerospace studies. 
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  3. ; ; (, Optica Publishing Group)
    We present inverse-designed compact multi-mode structures (bend, mode converter, and taper) for single-mode operation to enable low-loss, high power, and high-density signal routing with a demonstrated bend insertion loss of 0.48 dB on commercial foundry platforms. 
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  4. ; ; (, IEEE IPC conference 2022)
    We designed a compact integrated Silicon Nitride 1 x 3 balanced optical power splitter using density-based topology optimization with built-in fabrication constraints. We experimentally validate our design on a commercial foundry process with a splitting ratio of 30-36-33 % and an insertion loss of 2.48 dB across two wafers 
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  5. ; ; ; (, ACS Photonics)
    We present a novel device-design methodology that produces interferometrically robust photonic integrated circuits on commercial foundry platforms. This new approach, which we call phaseinjected topology optimization, leverages reciprocity to both reduce the computational load and condition the corresponding optimization problem and is compatible with existing adjoint-based design frameworks. We experimentally validate our methodology by designing, fabricating, and testing a 90◦ optical hybrid that operates over C-band and occupies just 8 μm × 8 μm. We measured our device across three different wafers, and observe < ±7◦ of random variability, and a net -10◦ systematic phase deviation between simulation and experiment across all four output arms. 
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  6. ; ; ; (, IEEE IPC conference)
    Abstract—We experimentally demonstrate normal-incidence grating couplers designed using topology optimization to couple into multi-core fiber. The insertion loss of the polarizing and polarization demultiplexing gratings was –5.5 dB and –7.7 dB, which is within 0.8 dB of the performance obtained using a fiber array 
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