Light beams carrying OAM (orbital angular momentum) exploit the transverse spatial distribution of photons and have helical phase front. In recent years. similar to the WDM (wavelength-division multiplexing) technology. OAM multiplexing technology has attracted widespread interest and made remarkable progress in high-speed and large-capacity optical signal transmission. https://safeersappliancers.shop/product-category/samsung-rs8000-rs68n8330s9-eu-american-style-fridge-freezer-matte-stainless/