INJECTION LASER Russian patent published in 2005 - IPC

FIELD: quantum electronic engineering.

SUBSTANCE: proposed laser that can be used, for instance, as optical radiation source for pumping optical fiber laser amplifiers and solid state lasers has separate limiting heterostructure incorporating multimode waveguide whose limiting layers function at the same time as p and n emitters of equal refractivity; active region having at least one quantum-size active layer and disposed in waveguide whose thickness meets expression Γ⁰ _QW/Γ^m _QW > 1.7, where Γ⁰ _QW and Γ^m _QW are optical limiting factors for active region of zero-mode and mode m (m = 1, 2, 3 ...), respectively; reflectors; optical faces; ohmic contacts; and optical resonator. Active region is disposed in additional layer whose refractivity is higher than that of waveguide layer and whose thickness and location in waveguide are dictated by mentioned expression that must be satisfied. Distances from active region to p and n emitters does not exceed diffusion lengths in waveguide holes and electrons, respectively.

EFFECT: reduced divergence of injection laser beam at high efficiency and output emission power; facilitated manufacture.

1 cl, 4 dwg