Prior to the deposition on the Er:Al2O3 Energetic product, the coupling circuit, i.e., the strip waveguides, the mode transition tapers along with the manner converters were being covered having a 800 nm thick layer of hydrogen silsesquioxane (HSQ, n ~one.forty five) to prevent their coating Together with the Energetic product, https://marlboroughy963ryg0.bloginder.com/profile