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- W3193662912 abstract "Silicon photonics (SiP) integrated coherent image sensors offer higher sensitivity and improved range-resolution-product compared to direct detection image sensors such as CCD and CMOS devices. Previous generation of SiP coherent imagers suffer from relative optical phase fluctuations between the signal and reference paths, which results in random phase and amplitude fluctuations in the output signal. This limitation negatively impacts the SNR and signal acquisition times. Here we present a coherent imager system that suppresses the optical carrier signal and removes non-idealities from the relative optical path using a photonic in-phase (I) and quadrature (Q) receiver via a $90^circ$ hybrid detector. Furthermore, we incorporate row-column read-out and row-column addressing schemes to address the electro-optical interconnect density challenge. Our novel row-column read-out architecture for the sensor array requires only $2N$ interconnects for $N^2$ sensors. An $8times8$ IQ sensor array is presented as a proof-of-concept demonstration with $1.2times 10^{-5}$ resolution over range accuracy. Free-space FMCW ranging with 250um resolution at 1m distance has been demonstrated using this sensor array." @default.
- W3193662912 created "2021-08-30" @default.
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- W3193662912 date "2021-08-17" @default.
- W3193662912 modified "2023-09-27" @default.
- W3193662912 title "IQ Photonic Receiver for Coherent Imaging with a Scalable Aperture" @default.
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- W3193662912 hasPublicationYear "2021" @default.
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