Low-frequency intensity fluctuations in high-power single-mode ridge quantum-well InGaAs/AlGaAs heterostructure semiconductor lasers

摘要

It is shown that for an average output power of 60 mW, the spectral density of low-frequency intensity fluctuations in single-mode semiconductor lasers lies in the interval 6 * 10~(-17)-10~(-15) W~2 Hz~(-1). This fluctuation level is caused by the presence of subthreshold longitudinal modes and mode hopping, leading to the emergence of a noticeable 1/f component in their spectrum.