A laser comprising a distributed Bragg mirror, said laser being designed to emit light radiation along a longitudinal direction (x) and comprising a waveguide formed at least in part in a stack of layers (11, 11 bis, 12, 13, 14, 15, 16) made of III-V materials, said waveguide comprising at least one active region configured to emit said light radiation, said stack having a top surface , the at least one active region being located at a depth h a measured along a first transverse direction (z) perpendicular to the longitudinal direction (x) and from the top surface , said Bragg mirror comprising lateral corrugations distributed periodically along a longitudinal direction (x) in a period Λ, said lateral corrugations being carried by at least one lateral flank of the waveguide parallel to a lateral plane (xz) defined by the longitudinal direction (x) and the first transverse direction (z), said lateral corrugations having a height h' along a first transverse direction (z) and a dimension d along a second transverse direction (y) perpendicular to the longitudinal direction (x), said lateral corrugations of the Bragg mirror extending from the top surface of the stack , and the height h' of the lateral corrugations being strictly less than the depth h a , such that a portion of the at least one lateral flank of the waveguide is free of any lateral corrugations , said portion being located at the level of the at least one active region , said laser also comprising a top electrode arranged on the top surface of the waveguide , said top electrode comprising a top portion covering the top surface of the waveguide, said laser characterised in that said top electrode equally comprises at least one lateral portion covering the lateral corrugations . said laser being designed to emit light radiation along a longitudinal direction (x) and comprising a waveguide formed at least in part in a stack of layers (11, 11 bis, 12, 13, 14, 15, 16) made of III-V materials, said waveguide comprising at least one active region configured to emit said light radiation, said stack having a top surface , the at least one active region being located at a depth h a measured along a first transverse direction (z) perpendicular to the longitudinal direction (x) and from the top surface , said Bragg mirror comprising lateral corrugations distributed periodically along a longitudinal direction (x) in a period Λ, said lateral corrugations being carried by at least one lateral flank of the waveguide parallel to a lateral plane (xz) defined by the longitudinal direction (x) and the first transverse direction (z), said lateral corrugations having a height h' along a first transverse direction (z) and a dimension d along a second transverse direction (y) perpendicular to the longitudinal direction (x), said lateral corrugations of the Bragg mirror extending from the top surface of the stack , and the height h' of the lateral corrugations being strictly less than the depth h a , such that a portion of the at least one lateral flank of the waveguide is free of any lateral corrugations , said portion being located at the level of the at least one active region , said laser also comprising a top electrode arranged on the top surface of the waveguide , said top electrode comprising a top portion covering the top surface of the waveguide, said laser characterised in that said top electrode equally comprises at least one lateral portion covering the lateral corrugations . <EOS>