ABOUT SLOT432

Prior to the deposition with the Er:Al2O3 active materials, the coupling circuit, i.e., the strip waveguides, the method changeover tapers and also the mode converters ended up protected with a 800 nm thick layer of hydrogen silsesquioxane (HSQ, n ~1.45) to forestall their coating with the active materials, as proven in Fig. one. The HSQ cladd