Relative intensity noise study in the injection-locked integrated electroabsorption modulator-lasers

Relative intensity noise (RIN), which represents the laser´s intrinsic resonance, is a very important property for semiconductor lasers. An electroabsorption modulator has commonly been developed monolithically with an integrated DFB laser to eliminate coupling. In this paper, we report new experimental results and theoretical calculations of RIN spectra of an injection-locked distributed feedback (DFB) laser using an integrated electroabsorption modulator-laser, which has a high reflection (HR) coating on the modulator side and an anti-reflection (AR) coating on the laser facet.