Optimization of Optical Filters based on Integrated Coupled Sagnac Loop Reflectors

We theoretically investigate integrated photonic resonators formed by two mutually coupled Sagnac loop reflectors (MC-SLRs). Mode interference in the MC-SLR resonators is tailored to achieve versatile filter shapes with high performance, which enable flexible spectral engineering for diverse applications. By adjusting the reflectivity of the Sagnac loop reflectors (SLRs) as well as the coupling strength between different SLRs, we achieve optical analogues of Fano resonance with ultrahigh spectral slope rates, wavelength interleaving / non-blocking switching functions with significantly enhanced filtering flatness, and compact bandpass filters with improved roll-off. In our designs the requirements for practical applications are considered, together with detailed analyses of the impact of structural parameters and fabrication tolerances. These results highlight the strong potential of MC-SLR resonators as advanced multi-functional integrated photonic filters for flexible spectral engineering in optical communications systems.

[1]  Sheldon McLaughlin,et al.  Multichannel tunable dispersion compensation using all-pass multicavity etalons , 2002, Optical Fiber Communication Conference and Exhibit.

[2]  Roberto Morandotti,et al.  All optical wavelength conversion in an integrated ring resonator , 2010, CLEO/QELS: 2010 Laser Science to Photonic Applications.

[3]  S. Chu,et al.  Laser cavity-soliton microcombs , 2019, Nature Photonics.

[4]  Roberto Morandotti,et al.  Photonic RF Phase-Encoded Signal Generation With a Microcomb Source , 2020, Journal of Lightwave Technology.

[5]  Sethumadhavan Chandrasekhar,et al.  An Etalon-Based Tunable Dispersion Compensator (TDC) Device for 40-Gbit/s Applications , 2002, 2002 28TH European Conference on Optical Communication.

[6]  Yuehai Wang,et al.  Bandwidth and wavelength tunable optical passband filter based on silicon multiple microring resonators. , 2016, Optics letters.

[7]  Hamed Arianfard,et al.  Tunable band (pass and stop) filters based on plasmonic structures using Kerr-type nonlinear rectangular nanocavity , 2016 .

[8]  D J Moss,et al.  Low power four wave mixing in an integrated, micro-ring resonator with Q = 1.2 million. , 2009, Optics express.

[9]  Ugo Fano,et al.  Sullo spettro di assorbimento dei gas nobili presso il limite dello spettro d’arco , 1935 .

[10]  Roberto Morandotti,et al.  Integrated frequency comb source of heralded single photons. , 2014, Optics express.

[11]  R. Morandotti,et al.  New CMOS-compatible platforms based on silicon nitride and Hydex for nonlinear optics , 2013, Nature Photonics.

[12]  Compact tunable electromagnetically induced transparency and Fano resonance on silicon platform. , 2017, Optics express.

[13]  Roberto Morandotti,et al.  RF Photonics: An Optical Microcombs’ Perspective , 2018, IEEE Journal of Selected Topics in Quantum Electronics.

[14]  Yuri S. Kivshar,et al.  Fano Resonances in Nanoscale Structures , 2010 .

[15]  B. Luk’yanchuk,et al.  Fano resonances and topological optics: an interplay of far- and near-field interference phenomena , 2013 .

[16]  Xiyu Long,et al.  Sharp Fano resonance induced by all-dielectric asymmetric metasurface , 2020 .

[17]  Yuri S. Kivshar,et al.  Fano resonances in photonics , 2017, Nature Photonics.

[18]  S. Chu,et al.  Generation of multiphoton entangled quantum states by means of integrated frequency combs , 2016, Science.

[19]  Yikai Su,et al.  On-Chip Tunable Second-Order Differential-Equation Solver Based on a Silicon Photonic Mode-Split Microresonator , 2015, Journal of Lightwave Technology.

[20]  D. J. Moss,et al.  On-chip CMOS-compatible all-optical integrator , 2010, Nature communications.

[21]  Roberto Morandotti,et al.  Cross-polarized photon-pair generation and bi-chromatically pumped optical parametric oscillation on a chip , 2015, Nature Communications.

[22]  Roberto Morandotti,et al.  Type II microcomb generation in a filter-driven four wave mixing laser , 2017, 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).

[23]  Pan Cao,et al.  Non-blocking 2 × 2 switching unit based on nested silicon microring resonators with high extinction ratios and low crosstalks , 2014 .

[24]  U. Fano.  Effects of Configuration Interaction on Intensities and Phase Shifts , 1961 .

[25]  Qianwu Zhang,et al.  Theoretical analysis of microring resonator-based biosensor with high resolution and free of temperature influence , 2017 .

[26]  Xingyuan Xu,et al.  Micro-ring resonator quality factor enhancement via an integrated Fabry-Perot cavity , 2017 .

[27]  Y. Kivshar,et al.  Fano interference governs wave transport in disordered systems , 2012, Nature Communications.

[28]  Richard A. Soref,et al.  Multiple-Sagnac-Loop Mach–Zehnder Interferometer for Wavelength Interleaving, Thermo-Optical Switching and Matched Filteri , 2018, Journal of Lightwave Technology.

[29]  Xingyuan Xu,et al.  Advanced photonic filters based on cascaded Sagnac loop reflector resonators in silicon-on-insulator nanowires , 2018 .

[30]  Lukas Chrostowski,et al.  Silicon Photonics Circuit Design: Methods, Tools and Challenges , 2018 .

[31]  J. Vučković,et al.  Inverse Designed Fano Resonance in Silicon Microresonators , 2019, 2019 Conference on Lasers and Electro-Optics (CLEO).

[32]  Cary Gunn,et al.  CMOS Photonics for High-Speed Interconnects , 2006, IEEE Micro.

[33]  Raman Kashyap,et al.  High-dimensional one-way quantum processing implemented on d-level cluster states , 2018, Nature Physics.

[34]  Roberto Morandotti,et al.  Subpicosecond optical pulse compression via an integrated nonlinear chirper. , 2010, Optics express.

[35]  Ming Li,et al.  A fully reconfigurable photonic integrated signal processor , 2016, Nature Photonics.

[36]  C.R. Doerr,et al.  Interleaver technology: comparisons and applications requirements , 2004, Journal of Lightwave Technology.

[37]  Roberto Morandotti,et al.  Passively mode-locked laser with an ultra-narrow spectral width , 2017, Nature Photonics.

[38]  Roberto Morandotti,et al.  On-chip generation of high-dimensional entangled quantum states and their coherent control , 2017, Nature.

[39]  Xinwan Li,et al.  Tunable silicon Fabry-Perot comb filters formed by Sagnac loop mirrors. , 2013, Optics letters.

[40]  Yu Zhang,et al.  Integrated Silicon Photonic Microresonators: Emerging Technologies , 2018, IEEE Journal of Selected Topics in Quantum Electronics.

[41]  Sheldon McLaughlin,et al.  Tunable dispersion and dispersion slope compensators for 10 Gb/s using all-pass multicavity etalons , 2002, IEEE/LEOS Summer Topi All-Optical Networking: Existing and Emerging Architecture and Applications/Dynamic Enablers of Next-Generation Optical Communications Systems/Fast Optical Processing in Optical.

[42]  Roberto Morandotti,et al.  Efficient self-phase modulation in low loss, high index doped silica glass integrated waveguides. , 2009, Optics express.

[43]  Hao Jia,et al.  General architectures for on-chip optical space and mode switching , 2018 .

[44]  Yonghui Tian,et al.  Tunable Fano resonances based on microring resonator with feedback coupled waveguide. , 2016, Optics express.

[45]  Ang Li,et al.  Tunable electromagnetically induced transparency in integrated silicon photonics circuit. , 2017, Optics express.

[46]  Roberto Morandotti,et al.  Supercontinuum generation in a high index doped silica glass spiral waveguide. , 2010, Optics express.

[47]  Roberto Morandotti,et al.  CMOS-compatible integrated optical hyper-parametric oscillator , 2010 .

[48]  Roberto Morandotti,et al.  Efficient wavelength conversion and net parametric gain via four wave mixing in a high index doped silica waveguide. , 2010, Optics express.

[49]  Four Wave Mixing control in a photonic molecule made by silicon microring resonators , 2019, Scientific Reports.

[50]  P. Dumon,et al.  Silicon microring resonators , 2012 .

[51]  R. Morandotti,et al.  Low-power continuous-wave nonlinear optics in doped silica glass integrated waveguide structures , 2008 .

[52]  Hamed Arianfard,et al.  Nanoscale plasmonic filter based on coupled metal-insulator-metal waveguides using nonlinear nanoslot resonator , 2014 .

[53]  Roberto Morandotti,et al.  Advanced RF and microwave functions based on an integrated optical frequency comb source. , 2018, Optics express.

[54]  Geert Morthier,et al.  Athermal Silicon-on-insulator ring resonators by overlaying a polymer cladding on narrowed waveguides. , 2009, Optics express.

[55]  Jiayang Wu,et al.  Compact silicon photonic interleaver based on a self-coupled optical waveguide. , 2016, Applied optics.

[56]  Sethumadhavan Chandrasekhar,et al.  Tunable dispersion compensation at 10 Gb/s and 40 Gb/s using multicavity all-pass etalons , 2003, OFC 2003 Optical Fiber Communications Conference, 2003..

[57]  D. Gill,et al.  Very high-order microring resonator filters for WDM applications , 2004, IEEE Photonics Technology Letters.

[58]  Uriel Levy,et al.  Fano resonances and all-optical switching in a resonantly coupled plasmonic–atomic system , 2014, Nature Communications.

[59]  R. Morandotti,et al.  Quantum optical micro-combs , 2019 .

[60]  Hui Chen,et al.  Silicon photonics: from a microresonator perspective , 2012 .

[61]  Pan Cao,et al.  Compact on-chip 1 × 2 wavelength selective switch based on silicon microring resonator with nested pairs of subrings , 2015 .

[62]  Michal Lipson,et al.  High bandwidth on-chip silicon photonic interleaver. , 2010, Optics express.

[63]  Pan Cao,et al.  Compact tunable silicon photonic differential-equation solver for general linear time-invariant systems. , 2014, Optics express.

[64]  Roberto Morandotti,et al.  Self-locked optical parametric oscillation in a CMOS compatible microring resonator: a route to robust optical frequency comb generation on a chip. , 2013, Optics express.

[65]  Roberto Morandotti,et al.  Stable, dual mode, high repetition rate mode-locked laser based on a microring resonator. , 2012, Optics express.

[66]  Wei Lu,et al.  Tunable and high-sensitivity sensing based on Fano resonance with coupled plasmonic cavities , 2017, Scientific Reports.

[67]  Roberto Morandotti,et al.  Parametric control of thermal self-pulsation in micro-cavities. , 2017, Optics letters.

[68]  Xingyuan Xu,et al.  2D Layered Graphene Oxide Films Integrated with Micro-Ring Resonators for Enhanced Nonlinear Optics. , 2020, Small.

[69]  Spectral engineering with coupled microcavities: active control of resonant mode-splitting. , 2015, Optics letters.

[70]  Xiaofeng Hu,et al.  Push–Pull Optical Nonreciprocal Transmission in Cascaded Silicon Microring Resonators , 2013, IEEE Photonics Journal.