Previous to the deposition of your Er:Al2O3 active substance, the coupling circuit, i.e., the strip waveguides, the mode transition tapers along with the manner converters were being coated by using a 800?nm thick layer of hydrogen silsesquioxane (HSQ, n?~one.45) to forestall their coating with the Energetic product, as shown in Fig. 1. The HSQ cl… Read More