26 September 2013 On-chip optical matrix-vector multiplier
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Matrix-vector multiplication is a fundamental operation in modern digital signal processing. Inspired by the intrinsic spatial parallelism of optics, many efforts have been made to develop optical apparatuses that can perform such a parallelizable operation. Here we report the proposal of an on-chip optical signal processor with the function of matrixvector multiplication, which is composed of laser-modulator array, multiplexer, splitter, microring modulator matrix and photodetector array. We fabricate a 4×4 microring modulator matrix on silicon-on-insulator (SOI) platform with complementary metal-oxide-semiconductor (CMOS)-compatible process. 8×107 multiplications and accumulations (MACs) per second is implemented by such an on-chip microring modulator matrix and off-chip laser-modulator array, multiplexer and photodetector. The significant progress in integrated optoelectronics makes it possible to integrate all required functional optical devices and even the driving and controlling circuits on the same chip. Theoretical analysis is given to estimate the potential performance of such an integrated system, which is several orders of magnitude faster than current electrical digital signal processors.
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Lin Yang, Lin Yang, Lei Zhang, Lei Zhang, Ruiqiang Ji, Ruiqiang Ji, } "On-chip optical matrix-vector multiplier", Proc. SPIE 8855, Optics and Photonics for Information Processing VII, 88550F (26 September 2013); doi: 10.1117/12.2028585; https://doi.org/10.1117/12.2028585

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