EFFECTS OF CURRENT MODULATION ON TIMING JITTER OF SINGLE-MODE SEMICONDUCTOR-LASERS IN SHORT EXTERNAL CAVITIES

Turn-on jitter of single-mode semiconductor lasers with modulated inje ction current and weak optical feedback exhibits periodic oscillations as a function of the length of the external cavity, under configurati ons appropriate for packaged laser diodes. Numerical results for both periodic and pseudorandom word modulation show that the oscillations p ersist even when increasing the external cavity length to a few millim eters. It is found that under particular positions of the external ref lector a large increase of jitter occurs as compared with the jitter w ithout optical feedback.