Spectral linewidth reduction in metalorganic vapor phase epitaxy grown 1.5 μm separate-confinement-heterostructure quantum well distributed feedback laser diodes

Abstract
Spectral linewidth reduction in 1.5 μm InGaAs/InGaAsP separate-confinement-heterostructure quantum well distributed feedback laser diodes (SCH-QW-DFB LD’s) is achieved for the first time. A 2.0 MHz minimum linewidth and a 5 MHz mW minimum linewidth power product are obtained.