A 1.3-\mu m wavelength vertical-mesa ridge waveguide mulitple-quantum-well (MQW) distributed feedback (DFB) laser with high directly modulated bandwidth and wide operation temperature range is reported. With the optimization of the strained-layer MQWs in the active region, the surrounding graded-index separated-confinement-heterostructure waveguide layers, together with the optimization of the detuning and coupling coefficient of the DFB grating, high directly modulation bandwidth of 16 GHz at r
共面波导电路,元件及系统设计。A coplanar waveguide (CPW) fabricated on a dielectric substrate was first
demonstrated by C. P. Wen [1] in 1969. Since that time, tremendous progress
has been made in CPW based microwave integrated circuits (MICs) as well as
monolithic microwave integrated circuits (MMICs) [2] to [5].