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 (101, 102) 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 (103, 104) of the at least one lateral flank (101, 102) of the waveguide is free of any lateral corrugations, said portion (103, 104) 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 (101, 102) 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 (103, 104) of the at least one lateral flank (101, 102) of the waveguide is free of any lateral corrugations, said portion (103, 104) 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.