We use traveling wave coupling theory to investigate the time domain characteristics of tapered semiconductor lasers with DBR gratings.We analyze the influence of the length of second order gratings on the power and s...We use traveling wave coupling theory to investigate the time domain characteristics of tapered semiconductor lasers with DBR gratings.We analyze the influence of the length of second order gratings on the power and spectrum of output light,and optimizing the length of gratings,in order to reduce the mode competition effect in the device,and obtain the high power output light wave with good longitudinal mode characteristics.展开更多
Optical resonators with controllable Q factors are key components in many areas of optical physics and engineering.We propose and investigate a Q-factor controllable system composed of two directly coupled microring r...Optical resonators with controllable Q factors are key components in many areas of optical physics and engineering.We propose and investigate a Q-factor controllable system composed of two directly coupled microring resonators,one of which is tunable and coupled to dual waveguides.By shifting the resonance of the controllable microring,the Q factor of the system as well as the other microring changes significantly.We have demonstrated wide-range controllable Q factors based on this structure in silicon-on-insulator,for example.The influences of spectral detuning and coupling strength between two resonators on the variation of Q factors are studied in detail experimentally.Then,we explore its applications in optical buffering.Tunable fast-to-slow/slow-to-fast light has been carried out by switching the system between the high-Q state and low-Q state.Moreover,optical pulse capture and release are also achievable using this structure with dynamic tuning,and the photon storage properties are investigated.The proposed Q-factor tunable system is simple,flexible,and realizable in various integrated photonic platforms,allowing for potential applications in on-chip optical communications and quantum information processing.展开更多
文摘We use traveling wave coupling theory to investigate the time domain characteristics of tapered semiconductor lasers with DBR gratings.We analyze the influence of the length of second order gratings on the power and spectrum of output light,and optimizing the length of gratings,in order to reduce the mode competition effect in the device,and obtain the high power output light wave with good longitudinal mode characteristics.
基金National Key Research and Development Program of China(2019YFB2203101)National Natural Science Foundation of China(61675084,61775094)State Key Laboratory of Advanced Optical Communication Systems and Networks(2021GZKF006).
文摘Optical resonators with controllable Q factors are key components in many areas of optical physics and engineering.We propose and investigate a Q-factor controllable system composed of two directly coupled microring resonators,one of which is tunable and coupled to dual waveguides.By shifting the resonance of the controllable microring,the Q factor of the system as well as the other microring changes significantly.We have demonstrated wide-range controllable Q factors based on this structure in silicon-on-insulator,for example.The influences of spectral detuning and coupling strength between two resonators on the variation of Q factors are studied in detail experimentally.Then,we explore its applications in optical buffering.Tunable fast-to-slow/slow-to-fast light has been carried out by switching the system between the high-Q state and low-Q state.Moreover,optical pulse capture and release are also achievable using this structure with dynamic tuning,and the photon storage properties are investigated.The proposed Q-factor tunable system is simple,flexible,and realizable in various integrated photonic platforms,allowing for potential applications in on-chip optical communications and quantum information processing.
