Electronics Letters · 1986 · 83 citations · 0 references
EngineeringElectrical EngineeringOpticsOptoelectronicsPhotonicsLaser PhysicsOptical AmplifiersOptical Properties Of SemiconductorsOptical ResonatorsOptical SourcesSemiconductor LasersExternal-cavity LasersLaser TuningOptical Amplifier DesignReflectivitySemiconductor Laser DiodesTunable External-cavity LasersTunable LasersWavelength Tuning
A 1.26 μm optical amplifier with a facet modal reflectivity below 0.0001 has been used in a 58 mm-long grating external cavity. The lasing wavelength has been continuously tuned without mode hopping over a range of 15 nm by combined translation-rotation of the diffraction grating. A linewidth of 20 kHz has been derived from heterodyne beat frequency measurements between two tunable external-cavity lasers.