Superbroadband high-power superluminescent diode emitting at 920 nm

The physical parameters of superluminescent diodes (SLDs) based on a single-layer quantum-well heterostructure with the (InGa)As active layer and a graded-index waveguide are studied. The power at the output of a single-mode fibre aligned with respect to the diode was 1 – 10 mW in the regime of spatially homogeneous injection depending on the length of the SLD active channel. The width of the emission spectrum was 100 – 110 nm, corresponding to the coherence length 7.6 – 8.8 μm.