Preparation method of single-mode gallium arsenide-based quantum dot laser
A gallium arsenide-based laser technology, which is applied to lasers, phonon exciters, laser components, etc., can solve problems such as high cost, difficulty in large-scale production, and complicated manufacturing process of single longitudinal mode lasers, so as to avoid aluminum oxidation , reduce complexity and cost, and enhance reliability
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[0038] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0039] Such as figure 1 as shown, figure 1 It is a flowchart of a preparation method of a single-mode gallium arsenide-based quantum dot laser according to an embodiment of the present invention. The single-mode gallium arsenide-based quantum dot laser adopts a strip-shaped ridge waveguide structure, including a gain region and a high-order grating region, wherein the In the high-order grating area described above, a series of equal-period grating grooves are deeply etched, and the refractive index modulation is introduced into the Fabry-Perot (FP) cavity, so that the mirror loss of the FP cavity has a minimum value at a specific wavelength. When the device works above the threshold, the point with the smallest mode gain...
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