Analysis of Mode Hopping Phenomenon in a 1.5μm In Ga As Laser

Abstract

Experiments and analog computer simulations were carried out to analyze the characteristics of mode hopping phenomenon in a 1.5μm In Ga As P laser when it oscillated with two longitudinal modes. It becomes clear for the first time that intensity fluctuation of the spontaneous emission acts as a trigger to the mode hopping, and that this hopping follows the stochastics of a Poisson process. Furthermore, it was found that highly biased operation is effective to reduce the frequency of the mode hopping.