Fourier synthesis dispersion engineering of photonic crystal microrings for broadband frequency combs

Abstract

Dispersion engineering of microring resonators is crucial for optical frequency comb applications, to achieve targeted bandwidths and powers of individual comb teeth. However, conventional microrings only present two geometric degrees of freedom -- width and thickness -- which limits the degree to which dispersion can be controlled. We present a technique where we tune individual resonance frequencies for arbitrary dispersion tailoring. Using a photonic crystal microring resonator that induces coupling to both directions of propagation within the ring, we investigate an intuitive design based on Fourier synthesis. Here, the desired photonic crystal spatial profile is obtained through a Fourier relationship with the targeted modal frequency shifts, where each modal shift is determined based on the corresponding effective index modulation of the ring. Experimentally, we demonstrate several distinct dispersion profiles over dozens of modes in transverse magnetic polarization. In contrast, we find that the transverse electric polarization requires a more advanced model that accounts for the discontinuity of the field at the modulated interface. Finally, we present simulations showing arbitrary frequency comb spectral envelope tailoring using our Frequency synthesis approach.

References in corpus (31)

• An Integrated-Photonics Optical-Frequency Synthesizer
• Photonic chip based optical frequency comb using soliton induced Cherenkov radiation
• Fully integrated ultra-low power Kerr comb generation
• Integrated turnkey soliton microcombs operated at CMOS frequencies
• Spatiotemporal Model for Kerr Comb Generation in Whispering Gallery Mode Resonators
• High-yield wafer-scale fabrication of ultralow-loss, dispersion-engineered silicon nitride photonic circuits
• Monolithic photonic circuits for Kerr frequency comb generation, filtering and modulation
• Stably accessing octave-spanning microresonator frequency combs in the soliton regime
• Octave-spanning dissipative Kerr soliton frequency combs in $S{i}_3{N}_4$ microresonators
• Frequency Comb Generation in 300 nm Thick SiN Concentric-Racetrack-Resonators: Overcoming the Material Dispersion Limit
• Dissipative Kerr solitons in photonic molecules
• Pockels Soliton Microcomb
• Dynamics of the Modulational Instability in Microresonator Frequency Combs
• Universal mechanism for the binding of temporal cavity solitons
• Spontaneous Pulse Formation in Edge-Less Photonic Crystal Resonators
• Towards visible soliton microcomb generation
• High-Q slow light and its localization in a photonic crystal microring
• Emergent Nonlinear Phenomena in a Driven Dissipative Photonic Dimer
• Ultra-Broadband Kerr Microcomb Through Soliton Spectral Translation
• Selective engineering of cavity resonance for frequency matching in optical parametric processes
• Switching dynamics of dark-pulse Kerr comb states in optical microresonators
• Dissipative Kerr solitons and Cherenkov radiation in optical microresonators with third order dispersion
• A universal frequency engineering tool for microcavity nonlinear optics: multiple selective mode splitting of whispering-gallery resonances
• Phased-Locked Two-Color Single Soliton Microcombs in Dispersion-Engineered Si3N4 Resonators
• pyLLE: a Fast and User Friendly Lugiato-Lefever Equation Solver
• Highly-twisted states of light from a high quality factor photonic crystal ring
• Integrated Buried Heaters for Efficient Spectral Control of Air-Clad Microresonator Frequency Combs
• Kerr optical parametric oscillation in a photonic crystal microring for accessing the infrared
• Fractional optical angular momentum and multi-defect-mediated mode re-normalization and orientation control in photonic crystal microring resonators
• Soliton blockade in bidirectional microresonators
• Advanced dispersion engineering of a III-Nitride micro-resonator for a blue/UV frequency comb

Cited by in corpus (8)

• Tailoring microcombs with inverse-designed, meta-dispersion microresonators
• Phase-stabilised self-injection-locked microcomb
• Spectral engineering of optical microresonators in anisotropic lithium niobate crystal
• Multi-mode microcavity frequency engineering through a shifted grating in a photonic crystal ring
• Optimization of the degenerate optical parametric oscillations threshold in bichromatically pumped microresonator
• Spectral shaping of fast-gain frequency combs through phases in synthetic dimensions
• Self-cooling, blue-detuned dissipative Kerr microresonator soliton comb
• Multistable localized states in highly photonic polariton rings with a quasiperiodic modulation