We demonstrate a novel structure of light-emitting-diodes (LEDs) at infrared wavelengths for broadening their optical bandwidth performance. By incorporating the transverse p-n junction with multiple-quantum-wells (MQWs), which have different center wavelengths, the problems of non-uniform carrier distribution in the MQWs of traditional LEDs with vertical p-n junction can be totally eliminated. Tremendous wide 3-dB optical bandwidth (~580nm, 1042nm~1622nm) under 60mA injected current has been demonstrated.