title: Laterally coupled dual-grating distributed feedback lasers for generating mode-beat terahertz signals.
abstract: We present a laterally coupled dual wavelength 1.56/1.57-μm AlGaInAs/InP DFB laser, which, by introducing two different grating periods on each sidewall, emits two longitudinal modes simultaneously within the same cavity at a frequency separation of 0.82 THz. The beating signal is stabilized by nonlinear four-wave mixing in an electro-absorption modulator (EAM), located within a monolithically integrated resonant cavity. A stable 0.82-THz beating signal was observed over a wide range of bias parameters in terms of drive currents and bias to the DFB and EAM sections.
authors: Lianping
authors: L
authors: Hou
authors: Mohsin
authors: M
authors: Haji
authors: Iain
authors: I
authors: Eddie
authors: Hongliang
authors: H
authors: Zhu
authors: John H
authors: JH
authors: Marsh
mesh_terms: D004867:Equipment Design; D005246:Feedback; D007834:Lasers; D055620:Optical Phenomena; D055053:Terahertz Radiation