the lasing material
21laser — /lay zeuhr/, n. Physics. a device that produces a nearly parallel, nearly monochromatic, and coherent beam of light by exciting atoms to a higher energy level and causing them to radiate their energy in phase. Also called optical maser. [1955 60; …
22Boron nitride — IUPAC name Boron nitride Identifiers …
23Garnet — For other uses, see Garnet (disambiguation). Garnet General Category Nesosilicate Chemical …
24Neodymium-doped yttrium orthovanadate — Nd:YVO4 in a frequency doubled green laser pointer. Internal construction is shown. AAA type cells and electronics lead to a laser module (enlarged in lower diagram). This contains a powerful 808 nm IR diode laser that pumps a Nd:YVO4 laser… …
25Calcium fluoride — Chembox new ImageFileL1 = Calcium fluoride.jpg ImageSizeL1 = 150 px ImageFileR1 = Fluorite unit cell 3D ionic.png ImageSizeR1 = 150 px ImageFile2 = Fluorid vápenatý.png ImageSize2 = IUPACName = OtherNames = Section1 = Chembox Identifiers CASNo =… …
26Fiber laser — A fiber laser or fibre laser is a laser in which the active gain medium is an optical fiber doped with rare earth elements such as erbium, ytterbium, neodymium, dysprosium, praseodymium, and thulium. They are related to doped fiber amplifiers,… …
27SEAgel — (Safe Emulsion Agar gel) is one of a class of high tech foam materials known as aerogels. It is an excellent thermal insulator and among the least dense solids known; in fact, SEAgel has a density that is approximately equal to that of air.… …
28x-ray — /eks ray /, n. Also, x ray, X ray. 1. Physics. a. Often, x rays. a form of electromagnetic radiation, similar to light but of shorter wavelength and capable of penetrating solids and of ionizing gases. b. such radiation having wavelengths in the… …
29Population inversion — In physics, specifically statistical mechanics, a population inversion occurs when a system (such as a group of atoms or molecules) exists in state with more members in an excited state than in lower energy states. The concept is of fundamental… …
30Samarium — promethium ← samarium → europium ↑ Sm ↓ …
