Parallel Sensing With Multiple Microrings on a Single Bus Waveguide
IEEE JOURNAL OF QUANTUM ELECTRONICS(2024)
Abstract
We present a multiple microrings channel integrated chip and develop a signal processing method that enables parallel sensing with this chip. We utilize fast Fourier transform (FFT) and inverse fast Fourier transform (IFFT) to extract signals from different rings with different free spectra ranges (FSR). We verify this algorithm with temperature and solution sensing experiments. Compared with the conventional single-ring-single-resonance method, it shows improvements in up to 8 multi-channels capability and higher time resolution with the same experimental hardware.
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Key words
Microring resonator,optical sensor,Fourier transforming
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