Ahead of the deposition of the Er:Al2O3 active content, the coupling circuit, i.e., the strip waveguides, the method changeover tapers as well as the method converters were being coated using a 800 nm thick layer of hydrogen silsesquioxane (HSQ, n ~1.forty five) to forestall their coating with the active content, https://samuelf297ago3.wikigop.com/user