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New waveguides improve sensitivity by 22.9 dB for low-light spectrometry, suggesting better spectrum reconstruction with machine-learning.
We present a new generation of multi-mode interference waveguides designed for low-light spectrometry, employing machine-learning to reconstruct the input spectrum. Optimized etching of the waveguide surface increases sensitivity by 22.9 dB to -75 dBm (31.6 pW).
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Ramollari et al. (2025) studied this question.
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