The invention relates to a method for monitoring a passive optical network having a tree-like structure with a main line and a plurality of branches. Various methods of the present invention allow creation of semiconducting andor conducting devices from readily grown SWNT carpets rather than requiring the preparation of a patterned growth channel and takes advantage of the self-controlling nature of these carpet heights to ensure a known and controlled channel length for reliable electronic properties as compared to the prior methods. This configuration performs a rapid diamond impregnation into the plate without scraping off the diamond slurry from the plate. The laryngoscope assembly also includes an interchangeable laryngoscope blade including a trailing view tube sleeve for slidably mounting on the view tube and a leading spatula wherein the view tube sleeve has a leading transparent window for covering the aperture lens.