Low dispersion broadband integrated double-slot microring resonators optical buffer

Abstract

Microring resonator optical buffer is attractive in high-speed optical network system, but ordinary microring resonator use strip waveguide as its basic light guide medium, which cannot provide small footprint, low dispersion and high delay-bandwidth product (DBP) simultaneously. Double-slot waveguide structure was first proposed to construct racetrack-microring resonators. It was found that cascading multiple microrings can increase the delay-bandwidth and lower the dispersion of the resonators by optimizing the structure parameters. Optical buffer cascaded by 8 microrings with flat bandwidth of 20 GHz provided the delay of 150 ps and the dispersion of ~{10}^{-7} ps/nm over 1530−1630 nm, and the footprint of each microring was about 51. This study can provide design methods and theoretical basis support for practical application.

Keywords

optical buffer / microring / resonator / delay / slot / waveguide / dispersion

References

[1] Melloni A, Morichetti F. The long march of slow photonics. Nature Photonics, 2009, 3(3): 119–119

[2] Sheng X, Dong X, Zhang X, Peng C. Advances in the research on all-optical buffers. Study on Optical Communications, 2012, (6): 52–55

[3] Dutta M K, Chaubey V K. Modeling and performance analysis of optical packet switching network using fiber delay lines. In: Proceedings of India Conference. 2011, 1–4

[4] Melloni A, Canciamilla A, Ferrari C, Morichetti F, O'Faolain L, Krauss T, De La Rue R, Samarelli A, Sorel M. Tunable delay lines in silicon photonics: coupled resonators and photonic crystals, a comparison. IEEE Photonics Journal, 2010, 2(2): 181–194

[5] Xia F, Sekaric L, Vlasov Y. Ultracompact optical buffers on a silicon chip. Nature Photonics, 2007, 1(1): 65–71

[6] Morichetti F, Ferrari C, Canciamilla A, Melloni A. The first decade of coupled resonator optical waveguides: bringing slow light to applications. Laser & Photonics Reviews, 2012, 6(1): 74–96

[7] Bogaerts W, De Heyn P, Van Vaerenbergh T, De Vos K, Selvaraja S K, Claes T, Dumon P, Bienstman P, Van Thourhout D, Baets R. Silicon microring resonators. Laser & Photonics Reviews, 2012, 6(1): 47–73

[8] Almeida V R, Xu Q, Barrios C A, Lipson M. Guiding and confining light in void nanostructure. Optics Letters, 2004, 29(11): 1209–1211

[9] Jágerská J, Thomas N L, Houdré R, Bolten J, Moormann C, Wahlbrink T, Ctyroký J, Waldow M, Först M. Dispersion properties of silicon nanophotonic waveguides investigated with Fourier optics. Optics Letters, 2007, 32(18): 2723–2725

[10] Di Falco A, O’Faolain L, Krauss T F. Dispersion control and slow light in slotted photonic crystal waveguides. Applied Physics Letters, 2008, 92(8): 083501

[11] Zheng Z, Iqbal M, Liu J. Dispersion characteristics of SOI-based slot optical waveguides. Optics Communications, 2008, 281(20): 5151–5155

[12] Willner A E, Zhang L, Yue Y. Tailoring of dispersion and nonlinear properties of integrated silicon waveguides for signal processing applications. Semiconductor Science and Technology, 2011, 26(1): 014044

[13] Zhang L, Yue Y, Beausoleil R G, Willner A E. Analysis and engineering of chromatic dispersion in silicon waveguide bends and ring resonators. Optics Express, 2011, 19(9): 8102–8107

[14] Bao C, Yan Y, Zhang L, Yue Y, Willner A E. Tailoring of low chromatic dispersion over a broadband in silicon waveguides using a double-slot design. In: Proceedings of Conference on Laser and Electro-Optics. 2013, JTu4A.53-1–JTu4A.53-2

[15] Yan Y, Matsko A, Bao C, Maleki L, Willner A E. Increasing the spectral bandwidth of optical frequency comb generation in a microring resonator using dispersion tailoring slotted waveguide. In: Proceedings of IEEE Photonics Conference. 2013, 230–231

[16] Bao C, Yan Y, Zhang L, Yue Y, Ahmed N, Agarwal A M, Kimerling L C, Michel J, Willner A E. Increased bandwidth with flattened and low dispersion in a horizontal double-slot silicon waveguide. Journal of the Optical Society of America B, Optical Physics, 2015, 32(1): 26–30

[17] Sun R, Dong P, Feng N N, Hong C Y, Michel J, Lipson M, Kimerling L. Horizontal single and multiple slot waveguides: optical transmission at λ = 1550 nm. Optics Express, 2007, 15(26): 17967–17972PMID:19551093

[18] Prabhu A M, Tsay A, Han Z, Van V. Extreme miniaturization of silicon add–drop microring filters for VLSI photonics applications. IEEE Photonics Journal, 2010, 2(3): 436–444

[19] Selvaraja S K, Jaenen P, Bogaerts W, Van Thourhout D, Dumon P, Baets R. Fabrication of photonic wire and crystal circuits in silicon-on-insulator using 193-nm optical lithography. Journal of Lightwave Technology, 2009, 27(18): 4076–4083

[20] Selvaraja S K, Bogaerts W, Dumon P, Van Thourhout D, Baets R. Subnanometer linewidth uniformity in silicon nanophotonic waveguide devices using CMOS fabrication technology. IEEE Journal of Selected Topics in Quantum Electronics, 2010, 16(1): 316–324

[21] Selvaraja S K, De Vos K, Bogaerts W, Bienstman P, Van Thourhout D, Baets R. Effect of device density on the uniformity of silicon nano-photonic waveguide devices. In: Proceedings of IEEE LEOS Annual Meeting Conference. 2009, 311–312

[22] Xiao S, Khan M H, Shen H, Qi M. Compact silicon microring resonators with ultra-low propagation loss in the C band. Optics Express, 2007, 15(22): 14467–14475

[23] Bogaerts W, Selvaraja S K, Dumon P, Brouckaert J, De Vos K, Van Thourhout D, Baets R. Silicon-on-insulator spectral filters fabricated with CMOS technology. IEEE Journal of Selected Topics in Quantum Electronics, 2010, 16(1): 33–44

[24] Atabaki A H, Askari M, Eftekhar A A, Adibi A. Accurate post-fabrication trimming of silicon resonators. In: Proceedings of IEEE International Conference on Group IV Photonics GFP. 2012, 42–44

[25] Boeck R, Chrostowski L, Jaeger N A. Thermally tunable quadruple Vernier racetrack resonators. Optics Letters, 2013, 38(14): 2440–2442

[26] Shinobu F, Ishikura N, Arita Y, Tamanuki T, Baba T. Continuously tunable slow-light device consisting of heater-controlled silicon microring array. Optics Express, 2011, 19(14): 13557–13564

[27] Fontaine N K, Yang J, Pan Z, Chu S, Chen W, Little B E, Ben Yoo S J. Continuously tunable optical buffering at 40 Gb/s for optical packet switching networks. Journal of Lightwave Technology, 2008, 26(23): 3776–3783

[28] Zhu M, Liu H, Li X, Huang N, Sun Q, Wen J, Wang Z. Ultrabroadband flat dispersion tailoring of dual-slot silicon waveguides. Optics Express, 2012, 20(14): 15899–15907

[29] Subbaraman H, Ling T, Jiang Y, Chen M Y, Cao P, Chen R T. Design of a broadband highly dispersive pure silica photonic crystal fiber. Applied Optics, 2007, 46(16): 3263–3268

[30] Yoo H G, Fu Y, Riley D, Shin J H, Fauchet P M. Birefringence and optical power confinement in horizontal multi-slot waveguides made of Si and SiO₂. Optics Express, 2008, 16(12): 8623–8628

[31] Yang S H, Cooper M L, Bandaru P R, Mookherjea S. Giant birefringence in multi-slotted silicon nanophotonic waveguides. Optics Express, 2008, 16(11): 8306–8316

[32] Ding R, Baehr-Jones T, Kim W, Boyko B, Bojko R, Spott A, Pomerene A, Hill C, Reinhardt W, Hochberg M. Low-loss asymmetric strip-loaded slot waveguides in silicon-on-insulator. Applied Physics Letters, 2011, 98(23): 233303

[33] Uranus H P, Hoekstra H J W M. Modeling of loss-induced superluminal and negative group velocity in two-port ring-resonator circuits. Journal of Lightwave Technology, 2007, 25(9): 2376–2384

[34] Lou F. Theoretical study on microring resonators based all optical buffers. Dissertation for the Doctoral Degree.Wuhan: Huazhong University of Science and Technology, 2011, 21–27

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 61107051) and National High-tech R&D Program (No. SS2012AA010407).

RIGHTS & PERMISSIONS

2016 Higher Education Press and Springer-Verlag Berlin Heidelberg