A Novel Two-Section Co-Cavity Wavelength Tunable Sem iconductor Laser

A novel wavelength tunable semiconductor laser based on DFB (Distributed Feedback) structure with two non\|uniform sections and co\|cavity is reported in this paper.The laser structure was grown by three\|step MOCVD and subsequently processed into the PBH\|LD (Planar Buried Heterostructure\|Laser Diode) devices.The device was tuned in two ways.A discontinuous wavelength tuning range of 11 1nm and a continuous wavelength tuning range of 2 6nm was achieved in different tuning ways.Only one control current was used to have the wavelength tuned in both ways.