Patent ID: 6650671
Filing Date: 2003-11-18
Classification: H01S

Abstract:
A semiconductor diode laser comprising:a waveguide region having a first refractive index and a waveguide thickness, the waveguide region including a first side, and a second side; a quantum well located within the waveguide region; a p-type cladding layer having a second refractive index smaller than the first refractive index, the p-type cladding layer being disposed on the first side of the waveguide region; and an n-type cladding layer having a third refractive index smaller than the first refractive index and larger than the second refractive index, the n-type cladding layer being disposed on the second side of the waveguide region; wherein the combination of the waveguide thickness and the indices of refraction of the waveguide region, the p-type cladding layer, and the n-type cladding layer require that a radiation beam emitted by the semiconductor laser diode have a vertical far-field divergence of less than 25 degrees.