SUPERLUMINESCENT LIGHT- EMITTING DIODE (SLD), WHICH IS A SEMICONDUCTOR LIGHT EMITTER. IT EMITS BROADBAND OPTICAL RADIATION BASED ON AMPLIFIED SPONTANEOUS EMISSION. THE SLD CONTAINS A RADIATING CRYSTAL, FACETS COATED WITH ANTI-REFLECTION COATING AND DEPENDING ON THE APPLICATION AY CONTAIN A PASSIVE HEATSINK, PELTIER THERMAL COOLER, A TEMPERATURE SENSITIVE RESISTOR AND PHOTODIODE. IT IS USED FOR MEDICAL IMAGING.

GENERAL RULES 1 AND 6 FOR THE INTERPRETATION OF THE COMBINED NOMENCLATURE. EU REGULATION 1037/2014. HARMONISED SYSTEM EXPLANATORY NOTES TO HEADING 8541 (2). TEXT TO CN CODES 8541, 8541 41 AND 8541 41 00.