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1. A multi-PMT optical sensor for IceCube-Gen2

   https://doi.org/10.1088/1748-0221/16/11/C11009  

   Basu, V. (November 2021, Journal of Instrumentation)

   Abstract A new long optical module (LOM) is under development for IceCube-Gen2, the proposed expansion to the IceCube neutrino observatory at the South Pole. The module is housed in an elongated borosilicate-glass pressure vessel, the size of which is constrained by the borehole diameter, which impacts drilling economy. The designs under consideration use either 16 or 18 4-inch PMTs, conditional on future performance tests, mounted so as to guarantee full angular coverage. Modular electronics have been custom-designed to fit into the available space and to minimize cost and power requirements for the ∼10000 modules to be installed. We will provide an overview of our approach to these design considerations and summarize the results of our tests and simulations. Prototype modules will be installed in the upcoming IceCube Upgrade. 

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2. Classification of Snowflakes Using Multi-View Optical Instruments

   Thant, H; Hicks, A; Key, C.; Notaros, B. M. (January 2022, Proceedings of the 2022 USNC-URSI Radio Science Meeting (Joint with IEEE AP-S Symposium), July 10–15, 2022, Denver, Colorado)
3. Multi-Functional Optical-to-Optical ( O / O ) Logics with Transistor Laser Integrated Photonic Circuits

   Qiu, Junyi; Peng, Yu-ting; Winoto, Ardy; Wu, Dufei; Feng, Milton; Holonyak, Nick (January 2018, Techcon 2018)
4. Optimal binary gratings for multi-wavelength magneto-optical traps

   https://doi.org/10.1364/OE.498606  

   Burrow, Oliver S.; Fasano, Robert J.; Brand, Wesley; Wright, Michael W.; Li, Wenbo; Ludlow, Andrew D.; Riis, Erling; Griffin, Paul F.; Arnold, Aidan S. (January 2023, Optics Express)

   Grating magneto-optical traps are an enabling quantum technology for portable metrological devices with ultracold atoms. However, beam diffraction efficiency and angle are affected by wavelength, creating a single-optic design challenge for laser cooling in two stages at two distinct wavelengths – as commonly used for loading, e.g., Sr or Yb atoms into optical lattice or tweezer clocks. Here, we optically characterize a wide variety of binary gratings at different wavelengths to find a simple empirical fit to experimental grating diffraction efficiency data in terms of dimensionless etch depth and period for various duty cycles. The model avoids complex 3D light-grating surface calculations, yet still yields results accurate to a few percent across a broad range of parameters. Gratings optimized for two (or more) wavelengths can now be designed in an informed manner suitable for a wide class of atomic species enabling advanced quantum technologies. 

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5. A multi-PMT Optical Module for the IceCube Upgrade

   https://doi.org/10.1051/epjconf/201920706004  

   Classen, Lew; Kappes, Alexander; Karg, Timo (January 2020, Pos proceedings of science)