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Award ID contains: 2052808

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  1. ; ; (, IEEE Photonics Technology Letters)
    We describe a design methodology for optimizing an ultra-compact 3 μm long circular high contrast grating (HCG) reflector. A multi-stage optimization process involving parameter optimization (PO) followed by seeded topology optimization (TO) is demonstrated to design a device with performance better than that achieved with PO or TO alone. The device is designed for a foundry process and offers reflection commensurate with waveguide-based Bragg gratings with a significantly higher bandwidth in an ultra-compact footprint. A peak reflectance of 98.9 % was simulated centered at 1569 nm with a minimum reflectance of 97.9 % over C-band. 
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    Full Text Available 
  2. ; ; ; ; (, IEEE)
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  3. ; ; (, IEEE)
    We present compact, low-loss silicon nitride mode converters designed using topology optimization and fabricated on a commercial silicon foundry. We experimentally demonstrate efficient mode conversion (-0.32 dB for TE00 to TE01 and -0.52 dB for TE00 to TE02), both within 0.4 dB of simulation. 
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    Full Text Available 
  4. ; ; ; ; (, IEEE)
    Abstract—Simulating nonlinear systems featuring a dynamic DSP module is cumbersome, e.g., fiber transport with digital coherent receivers. Machine Learning is used to quickly and accurately estimate waveforms transported through multi-span fiber links over multiple launch powers and OSNRs. Replacing simulation techniques with ML is considered. 
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    Full Text Available 
  5. ; ; (, IEEE)
    For photonic signal transport in multiple-GHz, waveform-sensitive RF transport applications, it will be shown that digital-over-fiber enables superior SNR performance versus analog-over-fiber. However, for SWaP-constrained systems, the latter can provide a viable solution with minimal SNR penalty 
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    Full Text Available 
  6. (, IEEE Nuclear & Space Radiation Effects Conference)
    Integrated SiPh MZMs are exposed to pulsed-laser-induced TPA, and the sensitivity to single-event transients is measured. A numerical model to predict the SET effects on SiPh MZM is developed, as well as a simulation path to validate the model. 
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    Accepted Manuscript Full Text Available
  7. (, CLEO 2023 conference on lasers and electro optics)
    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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    Accepted Manuscript Full Text Available
  8. ; ; ; (, IEEE)
    Compact, wideband structures to enable chip-scale polarization control are essential elements for large-scale integrated photonics. We experimentally validate inversedesigned polarization control structures fabricated on a commercial foundry, demonstrating rotator conversion efficiency of -1.5dB and splitter insertion losses of 1.4dB (TE) and 2.6dB (TM) across C-band. 
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    Full Text Available 
  9. (, Silicon Photonics Conference)
    Compact, wideband structures to enable chip-scale polarization control are essential elements for large-scale integrated photonics. We experimentally validate inversedesigned polarization control structures fabricated on a commercial foundry, demonstrating rotator conversion efficiency of -1.5dB and splitter insertion losses of 1.4dB (TE) and 2.6dB (TM) across C-band 
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    Accepted Manuscript Full Text Available
  10. ; ; ; ; ; ; ; (, Optica Publishing Group)
    DC measurements of differential resistance are used to identify resonance conditions in coherent 2x1 VCSEL arrays. Enhancement of small-signal modulation bandwidth and RIN and self-oscillation is demonstrated. 
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