Electroabsorption Modulator Integrated Distributed Feedback Laser with Integrated Semiconductor Optical Amplifier, and Driving Method for Same

摘要

The present invention relates to a driving method for an SOA integrated EA-DFB laser monolithically-integrating a DFB laser portion, an EA modulator portion and an SOA portion, on a same substrate, wherein an electric current I_SOA is injected into the SOA portion within a range of a power consumption not exceeding a total amount of a power consumption eliminated in the DFB laser portion of the SOA integrated EA-DFB laser and a power consumption eliminated in the EA modulator portion of the SOA integrated EA-DFB laser by eliminating an elimination amount ΔI_DFB from a maximum injection electric current into a DFB laser portion of an EA-DFB laser allowable in a case of mounting the EA-DFB laser on an optical transmission module.