Thermal Problems in Semiconductor Ring Laser

[摘要] Semiconductor ring lasers with a output waveguide have been produced and have attracted considerable attention in integrated optics. Owing to its extremely small size, the increase in temperature within the structure is expected to be higher. This thesis is concerned with the thermal effects of the ring laser and it consists of three parts: (1) theoretical numerical modelling: the temperature distribution within the ring laser structure has been simulated by using finite difference technique and its thermal resistance has also been calculated. The results obtained show that the temperature rise in the laser is more severe for small rings or narrow width ribs; (2) infrared imaging technique: thermal maps of the surface of the ring laser have been obtained by using a RM-20 infrared image scanner and have shown a good assessment of their thermal behaviour which can be used to compare qualitatively with the theoretical results; (3) improvement of the laser temperature control system and the investigation of its temperature sensing system have been successfuly achieved.

[发布机构] University:University of Glasgow

[关键词] Electrical engineering