Abstract: The invention relates to a distributed feedback laser diode (10) comprising a waveguide with a gain medium assisted by a network formed by a distribution of elements (22) including a sub-set comprising localised resonators (24) distributed along the axis of the waveguide, characterised in that the frequency characteristic of the feedback induced on the wave of the guide by the spatial distribution of said elements differs by less than 50% of the resonance frequency of said localised resonators.

Abstract: The invention relates to a distributed feedback laser diode (10) comprising a waveguide with a gain medium assisted by a network formed by a distribution of elements (22) including a sub-set comprising localised resonators (24) distributed along the axis of the waveguide, characterised in that the frequency characteristic of the feedback induced on the wave of the guide by the spatial distribution of said elements differs by less than 50% of the resonance frequency of said localised resonators.

Abstract: Electro-optical components are disclosed having intersubband transitions by quantum confinement between two Group III nitride elements, typically by means of GaN/AlN. Related devices or systems are also disclosed including such components, as well as to a method for manufacturing such a component. Such a component includes at least one active area that includes at least two so-called outer barrier layers surrounding one or more N-doped quantum well structures, and said quantum well structure(s) are each surrounded by two barrier areas that are unintentionally doped at a thickness of at least five monoatomic layers.

Abstract: A device is presented that is adapted to have an optical wave travel through it and to filter that wave in terms of wavelength, in which an optical parameter of the device varies along the path of the wave in such a manner that the device has a series of sections each constituted by a pair of two successive segments, one in which the values of the optical parameter are less than an average value and the other in which the values of the optical parameter are greater than the average value. The device has at least one zone of more than two sections. The two sections have lengths alternately less than and greater than an average length of the sections in that zone.