Over the past ten years, VCSELs have developed rapidly in structure, material, wavelength, and application fields. This stems from the advantages of VCSEL.
l. The outgoing beam is circular, with a small divergence angle, which is easy to couple with optical fibers and other optical components and has high efficiency.
2. It can realize high-speed modulation and can be applied to long-distance, high-speed optical fiber communication systems.
3. The active area is small in size, and it is easy to achieve single longitudinal mode and low threshold operation.
4. The electro-optical conversion efficiency can be greater than 50%, and a longer device life can be expected.
5. Easy to realize two-dimensional array, apply to parallel optical logic processing system, realize high-speed, large-capacity data processing, and can be applied to high-power devices.
6. Before the device is packaged, the chip can be tested and the product screened, which greatly reduces the cost of the product.
7. It can be applied to laminated optical integrated circuits, and micro-mechanical technologies can be used.
