Patent ID: 6493367
Filing Date: 2002-12-10
Classification: B82Y,G11B,H01S

Abstract:
A semiconductor laser device, comprising, in this order:a GaN layer; an Alx1Ga1-x1N (0.05&lE;x1&lE;0.2) lower cladding layer; an Iny1Ga1-y1N (0an active layer (thickness: Wa [&mgr;m]) having a multilayer structure comprising of alternating layers of a well layer and a barrier layer, the well layer comprising Ala1Inb1Ga1-a1-b1N1-e1-f1Pe1Asf1 (0&lE;a1, 0&lE;b1, a1+b1&lE;1, 0&lE;e1, 0&lE;f1, e1+f1<0.5), and the barrier layer comprising Ala2Inb2Ga1-a2-b2N1-e2-f2Pe2Asf2 (0&lE;a2, 0&lE;b2, a2+b2&lE;1, 0&lE;e2, 0&lE;f2, e2+f2<0.5); an Iny2Ga1-y2N (0an Alx2Ga1-x2N (0.05&lE;x2&lE;0.2) upper cladding layer, wherein: the thicknesses and the compositions of the lower guide layer and the upper guide layer are set such that ripples in a far field pattern in a direction perpendicular to a stack plane are suppressed.