Previous to the deposition on the Er:Al2O3 active materials, the coupling circuit, i.e., the strip waveguides, the mode changeover tapers as well as method converters had been coated with a 800 nm thick layer of hydrogen silsesquioxane (HSQ, n ~one.45) to stop their coating With all the active product, as https://lesterm431oal3.corpfinwiki.com/user