Research On Silicon-based Air Gap DBR Laser

As the information technology has been developing rapidly,the data processing capability of traditional electronic components has been unable to satisfy humans requirements nowadays since the performance of electrical interconnection system is limited by its material properties.It has been a major research area in the field of electronic information science these years that people are trying to replace the traditional electrical interconnection system with silicon-based optical interconnection system.Therefore,as an important part of optical system,the design and manufacture of silicon based lasers have attracted a lot of attention from academia and industry.As we know,silicon is indirect band gap material,which leads to a low efficiency of luminescence comparing with direct band gap materials such as InP.However,since silicon based material has CMOS process which is a well developed designing platform,also because the cost of silicon is much lower than direct band gap materials,silicon based laser is still a main research direction for many scientists in this area.Numerical simulation is an efficient tool for laser design and optimization.However,the silicon based semiconductor laser is hard to be simulated for its structural complexity in all three diversions.In this paper,a numerical solution of ?-?-on-silicon distributed Bragg reflector(DBR)lasers is presented.The laser structure is divided into active and passive region and are simulated by traveling-wave model and digital filter approach.A new structure of silicon based single-mode DBR laser is also designed based on air channel structure and silicon-on-insulator(SOI)waveguide grating.The main works are listed as follows:1.A numerical solution based on traveling wave model was presented,which is able to simulate the performance of F-P and DBF semiconductor lasers in time domain.Thermal effects were also been considered in the solution.2.Digital filter approach was studied and realized in algorithm,which is used for simulating passive region of silicon based DBR lasers.A new algorithm based on traveling wave model and digital filter approach was presented which is able to simulate the performance of ?-?-on-silicon distributed Bragg reflector(DBR)lasers in time domain.3.A new structure of silicon based single-mode DBR laser was designed based on air channel structure and silicon-on-insulator(SOI)waveguide grating.Double taper structure was designed for the coupling of optical field between active layer and passive layer.