Superluminescent Diode at Inphinix Inc in USA

https://www.inphenix.com/en/superluminescent-diode-devices/

#Superluminescentdiode (SLD) is an edge-emitting semiconductor light source.

SLDs are similar in geometry to lasers but have no built-in optical feedback mechanism required by LDs for stimulated emission to achieve lasing. #SLD are applied in situations where a smooth and broadband optical spectrum, combined with high spatial coherence and relatively high intensity.