[1] G. Li, A. V. Krishnamoorthy, I. Shubin, J. Yao, Y. Luo, H. Thacker, X. Zheng, K. Raj, J. E. Cunningham. Ring resonator modulators in silicon for interchip photonic links. IEEE J. Sel. Top. Quantum Electron., 19, 95-113(2013).

[2] B. M. M. Milosevic, S. Stankovic, S. Reynolds, T. D. Bucio, K. Li, D. J. Thomson, F. Gardes, G. T. Reed. The emergence of silicon photonics as a flexible technology platform. Proc. IEEE, 106, 2101-2116(2018).

[3] J. Sun, R. Kumar, M. Sakib, J. B. Driscoll, H. Jayatilleka, H. Rong. A 128 Gb/s PAM-4 silicon microring modulator with integrated thermo-optic resonance tuning. J. Lightwave Technol., 37, 110-115(2019).

[4] Y. Kim, Y. Jo, M. Kim, B.-M. Yu, C. Mai, S. Lischke, L. Zimmermann, W.-Y. Choi. Parametric optimization of depletion-type Si micro-ring modulator performances. Jpn. J. Appl. Phys., 58, 062006(2019).

[5] A. H. Atabaki, S. Moazeni, F. Pavanello, H. Gevorgyan, J. Notaros, L. Alloatti, M. T. Wade, C. Sun, S. A. Kruger, H. Meng, K. Al Qubaisi, I. Wang, B. Zhang, A. Khilo, C. V. Baiocco, M. A. Popović, V. M. Stojanović, R. J. Ram. Integrating photonics with silicon nanoelectronics for the next generation of systems on a chip. Nature, 556, 349-354(2018).

[6] R. Dube-Demers, J. St-Yves, A. Bois, Q. Zhong, M. Caverley, Y. Wang, L. Chrostowski, S. LaRochelle, D. V. Plant, W. Shi. Analytical modeling of silicon microring and microdisk modulators with electrical and optical dynamics. J. Lightwave Technol., 33, 4240-4252(2015).

[7] J. Rhim, Y. Ban, B.-M. Yu, J.-M. Lee, W.-Y. Choi. Verilog-A behavioral model for resonance-modulated silicon micro-ring modulator. Opt. Express, 23, 8762-8772(2015).

[8] M. Shin, Y. Ban, B. M. Yu, M. H. Kim, J. Rhim, L. Zimmermann, W. Y. Choi. A linear equivalent circuit model for depletion-type silicon microring modulators. IEEE Trans. Electron Devices, 64, 1140-1145(2017).

[9] M. Kim, M. Shin, M.-H. Kim, B.-M. Yu, C. Mai, S. Lischke, L. Zimmermann, W.-Y. Choi. A large-signal equivalent circuit for depletion-type silicon ring modulators. Optical Fiber Communication Conference, Th2A.13(2018).

[10] B. E. Little, S. T. Chu, H. A. Haus, J. Foresi, J.-P. Laine. Microring resonator channel dropping filters. J. Lightwave Technol., 15, 998-1005(1997).

[11] Y. Ban, J. M. Lee, B. M. Yu, S. H. Cho, W. Y. Choi. Small-signal frequency responses for Si micro-ring modulators. IEEE Optical Interconnects Conference (OI’14), 47-48(2014).

[12] Optilab PR-23-M. 23  GHz Linear Photoreceiver Module(2018).

[13] D. Knoll, S. Lischke, A. Awny, L. Zimmermann. SiGe BiCMOS for optoelectronics. ECS Trans., 75, 121-139(2016).

[14] . IEEE P802.3 bs 200  Gb/s and 400  Gb/s Ethernet Task Force..

[15] . OIF CEI-56G Application Note..

[16] A. Roshan-Zamir, B. Wang, S. Telaprolu, K. Yu, C. Li, M. A. Seyedi, M. Fiorentino, R. Beausoleil, S. Palermo. A 40  Gb/s PAM-4 silicon microring resonator modulator transmitter in 65  nm CMOS. IEEE Optical Interconnects Conference (OI), 8-9(2016).

[17] R. Li, D. Patel, A. Samani, E. El-Fiky, Z. Xing, M. Morsy-Osman, D. V. Plant. Silicon photonic ring-assisted MZI for 50  Gb/s DAC-less and DSP-free PAM-4 transmission. IEEE Photon. Technol. Lett., 29, 1046-1049(2017).

[18] R. Li, D. Patel, E. El-Fiky, A. Samani, Z. Xing, M. Morsy-Osman, D. V. Plant. High-speed low-chirp PAM-4 transmission based on push-pull silicon photonic microring modulators. Opt. Express, 25, 13222-13229(2017).

[19] S. Moazeni, S. Lin, M. Wade, L. Alloatti, R. J. Ram, M. Popovic, V. Stojanovic. A 40-Gb/s PAM-4 transmitter based on a ring-resonator optical DAC in 45-nm SOI CMOS. IEEE J. Solid-State Circuits, 52, 3503-3516(2017).

[20] H. Li, G. Balamurugan, M. Sakib, J. Sun, J. Driscoll, R. Kumar, H. Jayatilleka, H. Rong, J. Jaussi, B. Casper. A 112  Gb/s PAM-4 transmitter with silicon photonics microring modulator and CMOS driver. Optical Fiber Communication Conference, Th4A.4(2019).

[21] T. Kishi, M. Nagatani, S. Kanazawa, W. Kobayashi, H. Yamazaki, M. Ida, K. Kurishima, M. Nogawa, S. Kimura, H. Nosaka. 56  Gb/s optical transmission performance of an InP HBT PAM-4 driver compensating for nonlinearity of extinction curve of EAM. J. Lightwave Technol., 35, 75-81(2017).