Prior to the deposition in the Er:Al2O3 Energetic product, the coupling circuit, i.e., the strip waveguides, the mode transition tapers along with the mode converters had been lined which has a 800?nm thick layer of hydrogen silsesquioxane (HSQ, n?~1.45) to avoid their coating with the Energetic content, as proven in Fig. 1. The HSQ cladding was d