Recently, US retail giant Wal-Mart applied for a patent for a “floating warehouseâ€, which will be a highly subversive patent for the e-commerce sector. The entire "floating warehouse" will look like an airship, which can float in the air above 300 meters above sea level and operate autonomously, of course, allowing the pilot to operate remotely. The description of the patent is, “This is a gas-filled aircraft carrier and uses drones to transport products.â€
In fact, Wal-Mart's patent is actually very similar to Amazon's acquisition of a patent last year, and the two companies have been in the same state of e-commerce. Only Wal-Mart's digital business is growing, while Amazon is constantly strengthening its real estate portfolio, and is also planning to acquire the WholeFoods supermarket chain.
It's worth noting that in October last year Wal-Mart submitted another patent that competed with Amazon. Similar to the Internet giant's Dash button, users can seamlessly order daily merchandise with just one click. The new patent announced this time, compared with the traditional fixed facilities, the "floating warehouse" will allow Wal-Mart's sales area to expand again. And with a similar patent Amazon, it will certainly compete with Wal-Mart to seize the opportunity.
PLC, that is, planar optical waveguide, that is to say, the optical waveguide is located in a plane.
As everyone is familiar with single-layer circuit boards, all circuits are located in a plane of the substrate. Therefore, PLC is a kind of technology, it does not refer to a certain type of product, let alone a splitter! Our most common PLC splitter is made of silicon dioxide (SiO2). In fact, PLC technology involves a wide range of materials, such as glass/silicon dioxide (Quartz/Silica/SiO2), lithium niobate (LiNbO3), III-V semiconductor compounds (such as InP, GaAs, etc.), silicon-on-insulator (SOI/SIMOX), silicon oxynitride (SiON), polymer, etc.
Devices based on planar optical waveguide technology solutions include: Splitter, Star coupler, Variable Optical Attenuator (VOA), Optical switch, Optical comb ( Interleaver) and Array Waveguide Grating (AWG), etc. According to the requirements of different applications (such as response time, ambient temperature, etc.), these devices can be made by choosing different material systems and processing techniques. It is worth mentioning that these devices are all optical passive devices and are independent. They can be combined with each other or with other active devices to form high-end devices with different functions.
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