Research Article

Integrated Duo Wavelength VCSEL Using an Electrically Pumped GaInAs/AlGaAs 980 nm Cavity at the Bottom and an Optically Pumped GaInAs/AlGaInAs 1550 nm Cavity on the Top

Figure 1

Energy band diagram showing the energy gaps at the different layers of the integrated optically pumped 1550 top emitting and electrically pumped 980 nm bottom emitting VCSELs. The substrate layer is on the right side (bottom) and the left side is the DBR layers of the 1550 nm VCSEL (top).