Abstract
The electro-absorption modulated lasers(EMLs) has the advantage of high modulation speed、low drive voltage、integrated with lasers、small size. All of these are suitable to be the light source of metropolitan fiber network. Operating at a high temperature range without thermoelectric cooler (TEC) is the goals of this thesis. The work of this thesis includes the design of the uncooled quantum well structure and measures the optical characteristic of the devices. We use the AlGaInAs/InP material system in order to get the outstanding temperature characteristic. Two different EAM quantum well designs are integrated with 1.55μm FP and DFB laser respectively, and compare which one is better for the high temperature operation. According to the results, we find that the EAM has larger absorption and better performance of temperature when the quantum well is deeper and the thickness of the barrier is thicker. The reason is such structure has stronger QCSE so that we can observe the exciton absorption peak at different temperature with the zero bias. However, the shallower quantum well may have the smaller absorption, but it could reduce the chirp effects theoretically. We did not package the device yet,and measure the influence of the quantum well structure on chirp parameter. We expect to verify this point in the future.