Mode behavior of single-mode semiconductor lasers

摘要

Mode behavior of single longitudinal mode semiconductor lasers are modeled and employed for configuring external cavity lasers, including external cavity diode lasers (ECDLs). In particular, equations employed for modeling active and passive mode pulling effects are derived, and the equations are combined to formulate an equation corresponding to an optimal operating condition under which longitudinal lasing mode stability is enhanced. Under the optimal condition, the laser will operate in a lasing mode with the lowest threshold losses that is also stable. Based on the equation, a full-width-half maximum (FWHM) value for in intracavity filter can be selected to enable the laser to operate under or approach the optimal operating condition.