Resarch On Coupled-cavity Semiconductor Laser

With the rapid development of information technology, the transmission speed of traditional optical communication networks face great challenges. Many novel semiconductor lasers in order to meet the ever increasing demand. For instance, wavelength switchable lasers are of great use in multiplexing systems, and narrow linewidth lasers make coherent communication such as multiple-phase shift keying (MPSK).In this thesis, we report some coupled cavity lasers with novel structures, such as V-coupled cavity lasers and series-coupled cavity lasers. In the analysis of the laser operation, we use method of line (MOL) to rectify the result of the original transfer matrix method (TMM), and to optimize the device designs.We have designed two types of series-coupled cavity laser, and report the fabrication process in detail. The measurement results are then presented. The single mode coupled cavity laser shows a good performance with a SMSR more than40dB and a narrow linewidth as small as120k Hz. The wavelength switchable coupled cavity laser is able to generate8channels with SMSR more than30dB. These two types of coupled cavity laser may have potential applications in modern optical communication systems.