A device comprising a plurality of spatially arrayed coherent quantum semiconductor lasers, comprising: - a plurality of active structures (62, 105) placed in a plane (Oxy) and comprising at least one gain layer able to generate an optical wave having at least one emission wavelength (λ) and intended to emit when charge carriers are injected into said active structures, - each active structure comprising a stack of several hundreds to several thousands of layers embodying an alternation of layers defining a quantum well and layers defining a quantum barrier, - each active structure being placed between an upper structure and a lower structure placed on a substrate, - said upper and lower structures being adapted to allow the injection of charge carriers into said active structures and the containment of said optical wave in said plane (Oxy) and, - said device comprising a plurality of stripes forming optical guides and defined by at least one active structure, said stripes lying parallel to one another in an alignment direction (y) contained in said plane (Oxy) and, - an intermediate material occupying the intermediate zones (64, 84, 94, 104) between two stripes, said intermediate material having a thermal conductivity greater than the thermal conductivity of an active structure, characterised in that: - each stripe comprises at least one pointed first end, - said plurality of stripes is arranged in at least one first set of stripes and at least one second set of stripes, - two consecutive stripes in the same set are spaced at a constant separation distance less than or equal to said emission wavelength (λ), - said pointed ends of the stripes of the first set being orientated in the opposite direction to that of said pointed ends of the stripes of the second set and penetrating between the pointed ends of the stripes of the second set over a penetration distance (d) defining a first coupling zone via which a fundamental mode of the optical wave is transmitted via coupling of the first set of stripes to the second set of stripes. - a plurality of active structures (62, 105) placed in a plane (Oxy) and comprising at least one gain layer able to generate an optical wave having at least one emission wavelength (λ) and intended to emit when charge carriers are injected into said active structures, - each active structure comprising a stack of several hundreds to several thousands of layers embodying an alternation of layers defining a quantum well and layers defining a quantum barrier, - each active structure being placed between an upper structure and a lower structure placed on a substrate, - said upper and lower structures being adapted to allow the injection of charge carriers into said active structures and the containment of said optical wave in said plane (Oxy) and, - said device comprising a plurality of stripes forming optical guides and defined by at least one active structure, said stripes lying parallel to one another in an alignment direction (y) contained in said plane (Oxy) and, - an intermediate material occupying the intermediate zones (64, 84, 94, 104) between two stripes, said intermediate material having a thermal conductivity greater than the thermal conductivity of an active structure, - each stripe comprises at least one pointed first end, - said plurality of stripes is arranged in at least one first set of stripes and at least one second set of stripes, - two consecutive stripes in the same set are spaced at a constant separation distance less than or equal to said emission wavelength (λ), - said pointed ends of the stripes of the first set being orientated in the opposite direction to that of said pointed ends of the stripes of the second set and penetrating between the pointed ends of the stripes of the second set over a penetration distance (d) defining a first coupling zone via which a fundamental mode of the optical wave is transmitted via coupling of the first set of stripes to the second set of stripes.