[1] Haas S M, Shapiro J H. Capacity of wireless optical communications. IEEE Journal on Selected Areas in Communications, 2003, 21 (8): 1346–1357
[2] Maia Borges R, Cerqueira Sodre Junior A. Reconfigurable opticalwireless communications for future generations. IEEE Latin America Transactions, 2015, 13(11): 3580–3584
[3] Chaaban A, Morvan J M, Alouini M S. Free-space optical communications: capacity bounds, approximations, and a new sphere-packing perspective. IEEE Transactions on Communications, 2016, 64(3): 1176–1191
[4] Chen R Y, Yang Z Y. CMOS transimpedance amplifier for gigabitper- second optical wireless communications. IEEE Transactions on Circuits and Wystems. II: Express Briefs, 2016, 63(5): 418–422
[5] Anguita J A, Djordjevic I B, Neifeld M A, Vasic B V. Shannon capacities and error-correction codes for optical atmospheric turbulent channels. Journal of Optical Networking, 2005, 4(9): 586–601
[6] Niehusmann J, V?rckel A, Bolivar P H, Wahlbrink T, Henschel W, Kurz H. Ultrahigh-quality-factor silicon-on-insulator microring resonator. Optics Letters, 2004, 29(24): 2861–2863
[7] Bogaerts W, De Heyn P, Van Vaerenbergh T, De Vos K, Kumar Selvaraja S, Claes T, Dumon P, Bienstman P, Van Thourhout D, Baets R. Silicon microring resonators. Laser & Photonics Reviews, 2012, 6(1): 47–73
[8] Grover R, Absil P P, Van V, Hryniewicz J V, Little B E, King O, Calhoun L C, Johnson F G, Ho P T. Vertically coupled GaInAsP– InP microring resonators. Optics Letters, 2001, 26(8): 506–508
[9] ing Y, Ou H, Xu J, Xiong M, An Y, Hu H, Galili M, Riesgo A L, Seoane J, Yvind K, Oxenl?we L K, Zhang X, Huang D, Peucheret C. Linear all-optical signal processing using silicon micro-ring resonators. Frontiers of Optoelectronics, 2016, 9(3): 362–376
[10] Lipson M. Guiding, modulating, and emitting light on siliconchallenges and opportunities. Journal of Lightwave Technology, 2005, 23(12): 4222–4238
[11] Xiao H, Li D, Liu Z, Han X, Chen W, Zhao T, Tian Y, Yang J. Experimental realization of a CMOS-compatible optical directed priority encoder using cascaded micro-ring resonators. Nanophotonics, 2018, 7(4): 727–733
[12] Ishida K. Synchronous pseudo-noise code sequence generation circuit. U.S. Patent 5519736, 1996
[13] Xu Q, Lipson M. All-optical logic based on silicon micro-ring resonators. Optics Express, 2007, 15(3): 924–929
[14] Lee J H, Song I, Park S R, Lee J. Rapid acquisition of PN sequences with a new decision logic. IEEE Transactions on Vehicular Technology, 2004, 53(1): 49–60
[15] Yang L, Guo C, Zhu W, Zhang L, Sun C. Demonstration of a directed optical comparator based on two cascaded microring resonators. IEEE Photonics Technology Letters, 2015, 27(8): 809– 812
[16] Zhao Y, Wang X, Gao D, Dong J, Zhang X. On-chip programmable pulse processor employing cascaded MZI-MRR structure. Frontiers of Optoelectronics, 2019, 12(2): 148–156
[17] Little B E, Chu S T, Pan W, Kokubun Y. Microring resonator arrays for VLSI photonics. IEEE Photonics Technology Letters, 2000, 12 (3): 323–325
[18] Condo C, GrossW J. Pseudo-random Gaussian distribution through optimised LFSR permutations. Electronics Letters, 2015, 51(25): 2098–2100
[19] Rabus D G. Realization of optical filters using ring resonators with integrated semiconductor optical amplifiers in GaInAsP/InP. Dissertation for the Doctoral Degree. Berlin: Technische Universit?t Berlin, 2002
[20] Rakshit J K, Chattopadhyay T, Roy J N. Design of ring resonator based all-optical switch for logic and arithmetic operations–a theoretical study. Optik, 2013, 124(23): 6048–6057
[21] Bharti G K, Rakshit J K. Design and performance analysis of high speed optical binary code converter using micro-ring resonator. Fiber and Integrated Optics, 2018, 37(2): 103–121
[22] Houbavlis T, Zoiros K E, Kanellos G, Tsekrekos C. Performance analysis of ultrafast all-optical Boolean XOR gate using semiconductor optical amplifier-based Mach-Zehnder interferometer. Optics Communications, 2004, 232(1–6): 179–199
[23] Rakshit J K, Roy J N. Silicon micro-ring resonator-based all-optical digital-to-analog converter. Photonic Network Communications, 2017, 34(1): 84–92
[24] Rakshit J K, Roy J N. Design of all-optical universal shift register using nonlinear microring resonators. Journal of Computational Electronics, 2016, 15(4): 1450–1461
[25] Rakshit J K, Roy J N, Chattopadhyay T. A theoretical study of alloptical clocked D flip flop using single micro-ring resonator. Journal of Computational Electronics, 2014, 13(1): 278–286
[26] Asghari M, White I H, Penty R V. Wavelength conversion using semiconductor optical amplifiers. Journal of Lightwave Technology, 1997, 15(7): 1181–1190
