The four-wave mixing(FWM)effect offers promise to generate or amplify light at wavelengths where achieving substantial gain is challenging,particularly within the mid-infrared(MIR)spectral range.Here,based on the comm...The four-wave mixing(FWM)effect offers promise to generate or amplify light at wavelengths where achieving substantial gain is challenging,particularly within the mid-infrared(MIR)spectral range.Here,based on the commonly used 340 nm silicon-on-insulator(SOI)platform,we experimentally demonstrate high-efficiency and broadband wavelength conversion using the FWM effect in a high-Q silicon microring resonator pumped by a continuous-wave(CW)laser in the 2μm waveband.The microring resonator parameters are carefully optimized for effective phase-matching to obtain high conversion efficiency(CE)with broad bandwidth.The loaded quality(Ql)factor of the fabricated microring resonator is measured to be 1.11×105,at a resonance wavelength of 1999.3 nm,indicating low propagation losses of 1.68 dB/cm.A maximum CE of−15.57 dB is achieved with a low input pump power of only 4.42 dBm,representing,to our knowledge,the highest on-chip CE demonstrated to date under the CW pump in the MIR range.Furthermore,broadband wavelength conversion can be observed across a 140.4 nm wavelength range with a CE of−19.32 dB,and simulations indicate that the conversion bandwidth is over 400 nm.This work opens great potential in exploiting widely tunable on-chip sources using highefficiency wavelength conversion,particularly leveraging the advantages of the SOI platform in integrated photonics across the 2μm MIR range.展开更多
基金National Natural Science Foundation of China(62175080)National Key Research and Development Program of China(2022YFB2803600)。
文摘The four-wave mixing(FWM)effect offers promise to generate or amplify light at wavelengths where achieving substantial gain is challenging,particularly within the mid-infrared(MIR)spectral range.Here,based on the commonly used 340 nm silicon-on-insulator(SOI)platform,we experimentally demonstrate high-efficiency and broadband wavelength conversion using the FWM effect in a high-Q silicon microring resonator pumped by a continuous-wave(CW)laser in the 2μm waveband.The microring resonator parameters are carefully optimized for effective phase-matching to obtain high conversion efficiency(CE)with broad bandwidth.The loaded quality(Ql)factor of the fabricated microring resonator is measured to be 1.11×105,at a resonance wavelength of 1999.3 nm,indicating low propagation losses of 1.68 dB/cm.A maximum CE of−15.57 dB is achieved with a low input pump power of only 4.42 dBm,representing,to our knowledge,the highest on-chip CE demonstrated to date under the CW pump in the MIR range.Furthermore,broadband wavelength conversion can be observed across a 140.4 nm wavelength range with a CE of−19.32 dB,and simulations indicate that the conversion bandwidth is over 400 nm.This work opens great potential in exploiting widely tunable on-chip sources using highefficiency wavelength conversion,particularly leveraging the advantages of the SOI platform in integrated photonics across the 2μm MIR range.
