High-performance, intelligent, on-chip speckle spectrometer using 2D silicon photonic disordered microring lattice
Zhongjin Lin, Shangxuan Yu, Yuxuan Chen, Wangning Cai, Becky Lin, Jingxiang Song, Matthew Mitchell, Mustafa Hammood, Jaspreet Jhoja, Nicolas A. F. Jaeger, Wei Shi, Lukas Chrostowski
Abstract
High-performance integrated spectrometers are highly desirable for applications ranging from mobile phones to space probes. Based on silicon photonic integrated circuit technology, we propose and demonstrate an on-chip speckle spectrometer consisting of a 15×15, 2D disordered microring lattice. The proposed 2D, disordered microring lattice was simulated by the transfer-matrix method. The fabricated device featured a spectral resolution better than 15 pm and an operating bandwidth larger than 40 nm. We also demonstrated that, based on the speckle patterns, our device can perform a spectrum classification using machine learning algorithms, which will have a huge potential in fast, intelligent material and chemical analysis.