Small-signal modulation of multitransverse modes vertical-cavity surface-emitting semiconductor lasers

The small-signal modulation response of multi-transverse modes, proton-implanted vertical-cavity semiconductor lasers was studied experimentally and theoretically. Multiresonance frequencies and notches in the modulation response were obtained and the detailed characteristics varied for different overlap levels between the lasing modes. The theoretical modeling matched the experimental results and revealed the coupled oscillators manifestation for highly overlapping transverse modes.