Patent ID: 6055253
Filing Date: 2000-04-25
Classification: B82Y,H01S

Abstract:
A semiconductor laser device comprising:a quantum well layer including a well layer and a barrier layer for light emission;an optical guide layer for confining the light generated in the quantum well layer within the quantum well layer,an electron distribution control layer provided between the optical guide layer and the quantum well layer, anda cladding layer, the cladding layer and the electron distribution control layer sandwiching the optical guide layer;wherein the optical guide layer a) is thicker than a combined thickness of the electron distribution control layer and the quantum well layer, and b is undoped,energy band gaps of the electron distribution control layer, the barrier layer and the cladding layer are greater than an energy band gap of the optical guide layer, and the energy band gap of the barrier layer is smaller than the energy band gap of the electron distribution control layer,whereby electron distributions in the optical guide layer and in the quantum well layer are controlled.