Narrow-linewidth distributed feedback moiré-grating laser for high-speed optical communications
Yingming Zhao, Yu Li, Wei‐Ping Huang
Abstract
A time-domain traveling wave model is described to simulate a novel distributed feedback moiré-grating (DFM) laser, which can suppress the longitudinal spatial hole burning (LSHB) effect and improve the spectral linewidth for high-speed optical communications. The longitudinal photon distribution, linewidth, and dynamic modulation characteristics of the DFM lasers are calculated and compared with the state-of-the-art distributed feedback lasers. We found that the DFM laser can also improve the light-current slope efficiency and modulation bandwidth by introducing multiple $\unicode{x03C0} $π-phase shifts at the moiré envelope index changes while effectively suppressing the LSHB.
Topics & Concepts
Laser linewidthOpticsGratingLaserMaterials scienceModulation (music)Free-space optical communicationDistributed feedback laserDesign for manufacturabilityOptoelectronicsPhysicsAcousticsMechanical engineeringEngineeringPhotonic and Optical DevicesSemiconductor Lasers and Optical DevicesOptical Network Technologies