Applied Physics Letters · 1989 · 48 citations · 6 references
EngineeringElectrical EngineeringMaterials ScienceOpticsOptoelectronicsPhotonicsFiber OpticsLuminescent MaterialsOptical FibersOptical SourcesPhotonic MaterialsSemiconductor LasersAntireflection CoatingsBeam DivergenceDivergenceFiber LasersHigh-power LasersHigh-power Semiconductor LasersSingle-mode Optical FibersSuperluminescent Diodes
A superluminescent diode (SLD) operating in the 1.3 μm wavelength region has been fabricated by the liquid phase epitaxial growth technique. Lasing is effectively suppressed by incorporating an unpumped buried bent guide structure for SLD operation. Devices with an antireflection coating on the front facet emit a high optical power of 11.5 mW at an injection current of dc 200 mA. The Fabry–Perot mode has been sufficiently suppressed over the entire emission spectral bandwidth of 40 nm. The transverse mode is stable and a beam divergence of 48°×33° has been achieved. A coupling power of 1 mW was achieved for the 1.9% Δn, and 2.8-μm-diam core single-mode fiber by butting.
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