With an aim of ultra-low power operation, membranetype distributed-feedback (DFB) lasers consisting of wirelike active regions are realized with an InP-based high index-contrast waveguide by using benzocyclobutene (BCB) as well as direct boding on a silicon-on-insulator (SOI) substrate. Lateral current injection (LCI) type lasers on a semi-insulating (SI) InP substrate are also presented. Keywo...

Random distributed feedback fibre lasers belong to the class of random lasers, where the feedback is provided by amplified Rayleigh scattering on sub-micron refractive index inhomogenities randomly distributed over the fibre length. Despite the elastic nature of Rayleigh scattering, the feedback mechanism has been insofar deemed incoherent, which corresponds to the commonly observed smooth gene...