Pulse to pulse coherency of actively mode-locked laser diodes

Abstract

Mode-locked lasers are potentially viable in distribution of frequency reference signals in many distributed systems. Phase noise degradation of the reference signal distributed by a monolithically integrated electro-absorption (EA) modulator with multiple quantum well (MQW) laser diode is investigated. The FM noise degradation dependence on EA modulator bias voltage is correlated to pulse to pulse coherency time.