Vertical integration of dual wavelength index guided lasers
The vertical integration of two GaAs-based lasers operating at different wavelengths has been achieved with the use of re-growth technology. A V-channel substrate inner stripe structure was used for the bottom laser and a ridge waveguide for the top laser. Both lasers shared a common electrode and can be powered independently or simultaneously. This represents a promising method for fabricating integrated lasers with different wavelengths.