Integrated Passive Nonlinear Optical Isolators

Abstract

Fiber and bulk-optical isolators are widely used to stabilize laser cavities by preventing unwanted feedback. However, their integrated counterparts have been slow to be adopted. While several strategies for on-chip optical isolation have been realized, these rely on either integration of magneto-optic materials or high frequency modulation with acousto-optic or electro-optic modulators. Here, we demonstrate an integrated approach for passively isolating a continuous wave laser using the intrinsically non-reciprocal Kerr nonlinearity in ring resonators. Using silicon nitride as a model platform, we achieve single ring isolation of 17-23dB with 1.8-5.5dB insertion loss, and a cascaded ring isolation of 35dB with 5dB insertion loss. Employing these devices, we demonstrate hybrid integration and isolation with a semi-conductor laser chip.

References in corpus (27)

• All-optical signal processing platforms for CMOS compatible integrated nonlinear optics
• Integrated turnkey soliton microcombs operated at CMOS frequencies
• Hertz-linewidth semiconductor lasers using CMOS-ready ultra-high-$Q$ microresonators
• Generalized nonreciprocity in an optomechanical circuit via synthetic magnetism and reservoir engineering
• Periodically poled thin film lithium niobate microring resonators with a second-harmonic generation efficiency of 250,000%/W
• Bridging microcombs and silicon photonic engines for optoelectronics systems
• Non-Reciprocal Brillouin Scattering Induced Transparency
• High-yield wafer-scale fabrication of ultralow-loss, dispersion-engineered silicon nitride photonic circuits
• A photonic integrated circuit based erbium-doped amplifier
• Monolithic photonic circuits for Kerr frequency comb generation, filtering and modulation
• Integrated gallium phosphide nonlinear photonics
• Laser soliton microcombs on silicon
• Inverse-designed photonic circuits for fully passive, bias-free Kerr-based nonreciprocal transmission and routing
• Experimental demonstration of spontaneous chirality in a nonlinear microresonator
• Microresonator Isolators and Circulators Based on the Intrinsic Nonreciprocity of the Kerr Effect
• Electrically-driven Acousto-optics and Broadband Non-reciprocity in Silicon Photonics
• Nonreciprocal Inter-band Brillouin Modulation
• Frequency Comb Generation in 300 nm Thick SiN Concentric-Racetrack-Resonators: Overcoming the Material Dispersion Limit
• Magnetic-Free Silicon Nitride Integrated Optical Isolator
• Symmetry Breaking of Counter-Propagating Light in a Nonlinear Resonator
• Optical parametric oscillation in silicon carbide nanophotonics
• Demonstration of a Chip-based Nonlinear Optical Isolator
• Electrically driven linear optical isolation through phonon mediated Autler-Townes splitting
• Probing material absorption and optical nonlinearity of integrated photonic materials
• Mirror symmetric on-chip frequency circulation of light
• Optical Isolation with Microring Modulators
• Inverse-designed multi-dimensional silicon photonic transmitters

Cited by in corpus (5)

• Passive Bias-Free Nonreciprocal Metasurfaces Based on Nonlinear Quasi-Bound States in the Continuum
• Rabi resonance splitting phenomena in photonic integrated circuits
• Piezoelectric actuation for integrated photonics
• Novel functions in silicon photonic chips incorporated with graphene oxide thin films
• Nonreciprocity of intense light field and weak quantum signal in optomechanical systems with three-mode parametric interactions