Single-mode emission orbital angular momentum (OAM) laser
A technology of lasers and mode planes, applied in lasers, laser components, semiconductor lasers, etc., can solve problems affecting laser performance, serious surface recombination, etc., and achieve good single-mode characteristics, low threshold current, and easy coupling with optical fibers Effect
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[0033] The following is the single-mode surface-emitting OAM laser of the present invention. The schematic diagram of the laser is shown in figure 1 shown. 1 represents the N ohm contact layer, 2 represents the grating layer, 3 represents the upper cover layer, 4 represents the active area, the active area 4 usually includes the quantum well area and the upper and lower optical confinement layers, 5 represents the lower cover layer, and 6 represents the P In the ohmic contact layer, 7 represents the substrate, 8 represents the real grating in the top grating, and 9 represents the imaginary grating in the top grating.
[0034]The resonant cavity of the laser is a microcolumn, and the microcolumn makes the resonance mode of the laser a whispering gallery mode; the top of the microcolumn is provided with an N ohm contact layer 1 and a grating layer 2, and the P ohm contact layer is located under the lower cover layer 5; the N ohm contact layer Layer 1 is used for current inject...
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