Frequency-modulated(FM)laser combs,which offer a quasi-continuous-wave output and a flat-topped optical spectrum,are emerging as a promising solution for wavelength-division multiplexing applications,precision metrolo...Frequency-modulated(FM)laser combs,which offer a quasi-continuous-wave output and a flat-topped optical spectrum,are emerging as a promising solution for wavelength-division multiplexing applications,precision metrology,and ultrafast optical ranging.The generation of FM combs relies on spatial hole burning,group velocity dispersion,Kerr nonlinearity,and four-wave mixing(FWM).While FM combs have been widely observed in quantum cascade Fabry-Perot(FP)lasers,the requirement for a low-dispersion FP cavity can be a challenge in platforms where the waveguide dispersion is mainly determined by the material.Here we report a 60 GHz quantum-dot(QD)mode-locked laser in which both the amplitude-modulated(AM)and the FM comb can be generated independently.The high FWM efficiency of-5 dB allows the QD laser to generate FM comb efficiently.We also demonstrate that the Kerr nonlinearity can be practically engineered to improve the FM comb bandwidth without the need for GVD engineering.The maximum 3-dB bandwidth that our QD platform can deliver is as large as 2.2 THz.This study gives novel insights into the improvement of FM combs and paves the way for small-footprint,electrically pumped,and energy-efficient frequency combs for silicon photonic integrated circuits(PICs).展开更多
The architecture and component technology of a low power,high capacity,short reach optical interconnect are detailed.Measurements from high-performance 300 mm silicon photonics components that comprise the system are ...The architecture and component technology of a low power,high capacity,short reach optical interconnect are detailed.Measurements from high-performance 300 mm silicon photonics components that comprise the system are shown,along with a quantum-dot mode-locked laser 20-channel comb source with free space wall plug efficiencies up to 17%,advanced packaging techniques for 3D silicon photonic-electronic integration,and schematics for integrated electronics that control the photonic integrated circuits.Techniques for operating such a system in the presence of changing ambient temperature are addressed.Experiments on a 1 Tbps design are conducted with an optical link experiment indicating sub-picojoule/bit energy consumption at scale.展开更多
The architecture and component technology of a low power,high capacity,short reach optical interconnect are detailed.Measurements from high-performance 300 mm silicon photonics components that comprise the system are ...The architecture and component technology of a low power,high capacity,short reach optical interconnect are detailed.Measurements from high-performance 300 mm silicon photonics components that comprise the system are shown,along with a quantum-dot mode-locked laser 20-channel comb source with free space wall plug efficiencies up to 17%,advanced packaging techniques for 3D silicon photonic-electronic integration,and schematics for integrated electronics that control the photonic integrated circuits.Techniques for operating such a system in the presence of changing ambient temperature are addressed.Experiments on a 1 Tbps design are conducted with an optical link experiment indicating sub-picojoule/bit energy consumption at scale.展开更多
基金This work is supported by the Defense Advanced Research Projects Agency(DARPA)PIPES programs(HR0011-19-C-0083).
文摘Frequency-modulated(FM)laser combs,which offer a quasi-continuous-wave output and a flat-topped optical spectrum,are emerging as a promising solution for wavelength-division multiplexing applications,precision metrology,and ultrafast optical ranging.The generation of FM combs relies on spatial hole burning,group velocity dispersion,Kerr nonlinearity,and four-wave mixing(FWM).While FM combs have been widely observed in quantum cascade Fabry-Perot(FP)lasers,the requirement for a low-dispersion FP cavity can be a challenge in platforms where the waveguide dispersion is mainly determined by the material.Here we report a 60 GHz quantum-dot(QD)mode-locked laser in which both the amplitude-modulated(AM)and the FM comb can be generated independently.The high FWM efficiency of-5 dB allows the QD laser to generate FM comb efficiently.We also demonstrate that the Kerr nonlinearity can be practically engineered to improve the FM comb bandwidth without the need for GVD engineering.The maximum 3-dB bandwidth that our QD platform can deliver is as large as 2.2 THz.This study gives novel insights into the improvement of FM combs and paves the way for small-footprint,electrically pumped,and energy-efficient frequency combs for silicon photonic integrated circuits(PICs).
基金Defense Advanced Research Projects Agency(HR0011-19-C-0083)Semiconductor Research Corporation(2023-JU-3132)。
文摘The architecture and component technology of a low power,high capacity,short reach optical interconnect are detailed.Measurements from high-performance 300 mm silicon photonics components that comprise the system are shown,along with a quantum-dot mode-locked laser 20-channel comb source with free space wall plug efficiencies up to 17%,advanced packaging techniques for 3D silicon photonic-electronic integration,and schematics for integrated electronics that control the photonic integrated circuits.Techniques for operating such a system in the presence of changing ambient temperature are addressed.Experiments on a 1 Tbps design are conducted with an optical link experiment indicating sub-picojoule/bit energy consumption at scale.
基金Defense Advanced Research Projects Agency(HR0011-19-C-0083)Semiconductor Research Corporation(2023-JU-3132).
文摘The architecture and component technology of a low power,high capacity,short reach optical interconnect are detailed.Measurements from high-performance 300 mm silicon photonics components that comprise the system are shown,along with a quantum-dot mode-locked laser 20-channel comb source with free space wall plug efficiencies up to 17%,advanced packaging techniques for 3D silicon photonic-electronic integration,and schematics for integrated electronics that control the photonic integrated circuits.Techniques for operating such a system in the presence of changing ambient temperature are addressed.Experiments on a 1 Tbps design are conducted with an optical link experiment indicating sub-picojoule/bit energy consumption at scale.
