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External-cavity semiconductor laser with 15 nm continuous tuning range
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1986
Year
Optical MaterialsEngineeringLaser ScienceLaser ApplicationsLaser PhysicsExternal-cavity Semiconductor LaserDiffraction GratingOptical AmplifierSemiconductor LasersOptical PropertiesLasing WavelengthOptical SystemsOptical PumpingPhotonicsMicrowave PhotonicsWavelength TuningFacet Modal ReflectivityApplied PhysicsTunable LasersOptoelectronics
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.