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The broadest bandwidth (80 nm) superluminescent diode (SLD) with center wavelength at 850 nm fabricated on GaAs/AlGaAs double quantum-well structure is characterized and analyzed. The broadband flat-top like spectrum and a 0.3 dB spectral modulation enable this device to produce an axial resolution of 4 mum in optical coherence tomography systems.
Authors demonstrate the generation of broadband stimulated emission in the postgrowth wavelength tuned InAs/InAlGaAs quantum-dash (Qdash) laser grown on InP substrate. The laser exhibits room temperature lasing wavelength coverage of up to 50 nm at center wavelength of ~1.57 mum. Despite the bandgap blue-shift of ~70 nm after Qdash intermixing process, the laser exhibits a broadband signature of lasing...
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