Monolithic integration of laterally complex coupled DFB lasers with passive waveguides by positive wavelength detuning

Abstract

We have fabricated single mode lasers with lateral gratings by focused ion beam lithography. The transmission of the DFB mode through a passive unpumped waveguide section was studied as a function of the emission wavelength. The lateral grating was also investigated as a passive Bragg filter by pumping the unpatterned waveguide section. Ridge waveguides were fabricated on InGaAsP/InP laser structures with 8 compressively strained quantum wells.