Dissipative Kerr solitons(DKS) have long been suffering from poor power conversion efficiency when driven by continuous-wave lasers. By deriving the critical coupling condition of a multimode nonlinear optics system i...Dissipative Kerr solitons(DKS) have long been suffering from poor power conversion efficiency when driven by continuous-wave lasers. By deriving the critical coupling condition of a multimode nonlinear optics system in a generalized theoretical framework,two efficiency limitations of the conventional pump method of DKS are revealed: the effective coupling rate is too small and is also power-dependent. A general approach is provided to resolve this challenge by introducing two types of nonlinear couplers to couple the soliton cavity and CW input through nonlinear processes. The collective coupler opens multiple coupling channels and the self-adaptive coupler builds a power-independent effective external coupling rate to the DKS for approaching the generalized critical coupling condition, which promises near-unity power conversion efficiencies. For instance, a conversion efficiency exceeding 90% is predicted for aluminum nitride microrings with a nonlinear coupler utilizing second-harmonic generation. The mechanism applies to various nonlinear processes, including Raman and Brillouin scattering, and thus paves the way for micro-solitons toward practical applications.展开更多
Coherent conversion of microwave and optical photons can significantly expand the capabilities of information processing and communications systems.Here,we experimentally demonstrate the microwave-to-optical frequency...Coherent conversion of microwave and optical photons can significantly expand the capabilities of information processing and communications systems.Here,we experimentally demonstrate the microwave-to-optical frequency conversion in a magneto-optical whispering gallery mode microcavity.By applying a magnetic field parallel to the microsphere equator,the intracavity optical field will be modulated when the magnon is excited by the microwave drive,leading to a microwave-to-optical conversion via the magnetic Stokes and anti-Stokes scattering processes.The observed single-sideband conversion phenomenon indicates a nontrivial optical photon–magnon interaction mechanism derived from the magnon that induced both the frequency shift and modulated coupling rate of optical modes.In addition,we demonstrate the single-sideband frequency conversion with an ultrawide tuning range up to 2.5 GHz,showing its great potential in microwave-to-optical conversion.展开更多
基金supported by the National Natural Science Foundation of China (Grant Nos. 11934012, 12293053, 12374361, 11904316, 61690192, U21A20433, 12104441, 12293052, and U21A6006)the Anhui Provincial Natural Science Foundation (Grant Nos. 2008085QA34, and 2108085MA22)+2 种基金the Major Scientific Project of Zhejiang Laboratory (Grant No. 2020LC0AD01)supported by the Fundamental Research Funds for the Central Universities and University of Science and Technology of China (USTC) Research Funds of the Double First-Class Initiativesupported by the Supercomputing System in the Supercomputing Center of USTC and the USTC Center for Micro and Nanoscale Research and Fabrication。
文摘Dissipative Kerr solitons(DKS) have long been suffering from poor power conversion efficiency when driven by continuous-wave lasers. By deriving the critical coupling condition of a multimode nonlinear optics system in a generalized theoretical framework,two efficiency limitations of the conventional pump method of DKS are revealed: the effective coupling rate is too small and is also power-dependent. A general approach is provided to resolve this challenge by introducing two types of nonlinear couplers to couple the soliton cavity and CW input through nonlinear processes. The collective coupler opens multiple coupling channels and the self-adaptive coupler builds a power-independent effective external coupling rate to the DKS for approaching the generalized critical coupling condition, which promises near-unity power conversion efficiencies. For instance, a conversion efficiency exceeding 90% is predicted for aluminum nitride microrings with a nonlinear coupler utilizing second-harmonic generation. The mechanism applies to various nonlinear processes, including Raman and Brillouin scattering, and thus paves the way for micro-solitons toward practical applications.
基金National Key Research and Development Program of China(2020YFB2205801)National Natural Science Foundation of China(11874342,11934012,61805229,92050109)+1 种基金Fundamental Research Funds for the Central UniversitiesUSTC Research Funds of the Double First-Class Initiative(YD2470002002).
文摘Coherent conversion of microwave and optical photons can significantly expand the capabilities of information processing and communications systems.Here,we experimentally demonstrate the microwave-to-optical frequency conversion in a magneto-optical whispering gallery mode microcavity.By applying a magnetic field parallel to the microsphere equator,the intracavity optical field will be modulated when the magnon is excited by the microwave drive,leading to a microwave-to-optical conversion via the magnetic Stokes and anti-Stokes scattering processes.The observed single-sideband conversion phenomenon indicates a nontrivial optical photon–magnon interaction mechanism derived from the magnon that induced both the frequency shift and modulated coupling rate of optical modes.In addition,we demonstrate the single-sideband frequency conversion with an ultrawide tuning range up to 2.5 GHz,showing its great potential in microwave-to-optical conversion.
