MONOLITHIC INTEGRATION OF A QUANTUM-WELL LASER AND AN OPTICAL AMPLIFIER USING AN ASYMMETRIC TWIN-WAVE-GUIDE STRUCTURE

We demonstrate the monolithic integration of a 1.55-mu m wavelength In GaAsP-InP multiple-quantum-well (MQW) laser and a traveling-wave optic al amplifier using an asymmetric, vertical twin-waveguide structure. T he laser and amplifier share the same strained InGaAsP MQW active laye r grown by gas-source molecular beam epitaxy, while the underlying pas sive waveguide layer is used for on-chip optical interconnections betw een the active devices. The asymmetric twin-waveguide structure uses t he difference in modal gains to discriminate between the even and odd modes.