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\bibitem{Chandrasekar_etal2019} Chandrasekar, R., Lapin, Z. J., Nichols, A. S., Braun, R. M., \& Fountain, A. W. (2019). Photonic integrated circuits for Department of Defense-relevant chemical and biological sensing applications: state-of-the-art and future outlooks. In \textit{Opt. Eng.} (Vol. 58, 1).

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