Single-mode laser based on high-order surface gratings
A technology of surface gratings and lasers, applied in lasers, laser components, semiconductor lasers, etc., can solve problems such as unfavorable practical applications and complex electrical control systems of lasers, and achieve precise control, good single-mode characteristics, and simplified process flow Effect
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[0032] Such as figure 1 As shown, the single-mode laser based on the high-order surface grating of the present invention is a ridge waveguide structure, and the horizontal direction includes an electrode contact layer 1, a cover layer 2, an etching stop layer 3, an upper optical confinement layer 4, and a quantum well layer. 5. The lower optical confinement layer 6 and the substrate 7, wherein the upper optical confinement layer 4, the quantum well layer 5 and the lower optical confinement layer 6 constitute a waveguide core layer. A high-order Bragg grating 8 with a narrow groove width is etched on the surface of the ridge region near the output end of the laser, and the end face is coated with an anti-reflection film 9 ; the other end face of the laser is etched deeply to form 10 .
[0033] The grating is a Bragg reflection grating, and its period Λ is calculated according to the following formula:
[0034] Λ = m ...
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