laser device semiconductor

A.Device SEMICONDUCTOR LASER. B.A COMPOUND MEDIUM SEMICONDUCTOR 11 A FIRST LAYER COATING 12 LAYER ON 13 OF A SECOND COATING LAYER LAYER 14 AND RECOVERY 15 REGION WITH PHOTO-EMISSIVE SHAPED BAND MADE IN THE ACTIVE LAYER AND A PART 13 CURVE 18 AND PART PLANE. C.L'INVENTION REGARDING THE MANUFACTURE OF LASERS SEMICONDUCTOR.