Extremely broadband superluminescent diodes/semiconductor optical amplifiers in optical communication band

Superluminescent diodes with broad emission bandwidth characteristics and the mechanism of carrier distribution in the active layer are explored. Using InP substrate with five 6 nm InGaAsP quantum wells and two 15 nm InGaAs quantum wells, we get a very broad emission spectrum. The spectral width is nearly 400 nm, almost covering the range from 1250 nm to 1650 nm.