[1] A. Iocco, G. H. Limberger, P. R. Salathe et al. Bragg grating fast tunable filter for wavelength division multiplexing. J. Lightwave Technol., 17, 1217(1999).

[2] X. Wang, W. Shi, H. Yun et al. Narrow-band waveguide Bragg gratings on SOI wafers with CMOS-compatible fabrication process. Opt. Express, 20, 15547(2012).

[3] X. Chen, J. N. McMullin, C. J. Haugen et al. Planar concave grating demultiplexer for coarse WDM based on confocal ellipses. Opt. Commun., 237, 71(2004).

[4] C.-T. Lin, Y.-T. Huang, J.-Y. Huang et al. Integrated planar waveguide concave gratings for high density WDM systems. Proceedings of the IASTED International Conference on Optical Communication Systems and Networks, as part of the Fifth IASTED International Multi-Conference on Wireless and Optical Communications, 98(2005).

[5] P. Dong. Silicon photonic integrated circuits for wavelength-division multiplexing applications. IEEE J. Sel. Top. Quantum Electron., 22, 370(2016).

[6] S. M. Ojha, C. Cureton, T. Bricheno et al. Simple method of fabricating polarisation-insensitive and very low crosstalk AWG grating devices. Electron. Lett., 34, 78(1998).

[7] A. V. Krishnamoorthy, X. Zheng, G. Li et al. Dense WDM silicon photonic interconnects for compact high-end computing systems. IEEE Winter Topicals, 108(2011).

[8] S. Feng, W. Wang, S. J. X. Brian et al. The design of 1 × 2 MMI at the MIR wavelength of 2 m. IEEE International Conference on Electron Devices and Solid-State Circuits (EDSSC)(2019).

[9] H. Y. Wong, W. K. Tan, A. C. Bryce et al. Integrated asymmetric Mach-Zehnder interferometer WDM (DE)multiplexer using quantum well intermixing. International Conference on Indium Phosphide and Related Materials, 28(2005).

[10] D. X. Xu, A. Densmore, R. Ma et al. WDM addressed SOI ring resonator biosensor array. 6th IEEE International Conference on Group IV Photonics, 34(2009).

[11] H.-S. Lee, B. H. O, E.-H. Lee. Improved quality factor of a silicon micro-ring resonator for WDM filter application. 5th IEEE International Conference on Group IV Photonics, 305(2008).

[12] B. B. Bhowmik, S. Gupta, R. Gangopadhyay. Simultaneous demodulation and dispersion compensation of WDM DPSK channels using optical ring resonator. Opt. Commun., 285, 3483(2012).

[13] M. R. Almasian, K. Abedi. A proposal for optical WDM using embedded photonic crystal ring resonator with distributed coupling. Physica E, 79, 173(2016).

[14] D. Dai, X. Fu, Y. Shi et al. Experimental demonstration of an ultracompact Si-nanowire-based reflective arrayed-waveguide grating (de)multiplexer with photonic crystal reflectors. Opt. Lett., 35, 2594(2010).

[15] D. Martens, A. Z. Subramanian, S. Pathak et al. Compact silicon nitride arrayed waveguide gratings for very near-infrared wavelengths. IEEE Photon. Technol. Lett., 27, 137(2015).

[16] Q. Fang, X. Chen, Y. Zhao et al. Folded silicon-photonics arrayed waveguide grating integrated with loop-mirror reflectors. IEEE Photonics J., 10, 4900508(2018).

[17] Z. Zhang, J. Hu, H. Chen et al. Low-crosstalk silicon photonics arrayed waveguide grating. Chin. Opt. Lett., 15, 041301(2017).

[18] Z. Liu, J. Li. Modeling and design of arrayed waveguide gratings. 2nd International Asia Conference on Informatics in Control, Automation and Robotics, 339(2010).

[19] W. Bogaerts, P. De Heyn, T. Van Vaerenbergh et al. Silicon MRR resonators. Laser Photonics Rev., 6, 47(2012).