LASERS CERTIFICATION EXAM Q&A 2023 UPDATE

LASERS CERTIFICATION EXAM Q&A 2023 UPDATE Theorized the concept of stimulated emission - ANS-Einstein Theorized that an excited electron will spontaneously return to its ground state - ANSBohr First ruby laser was created in _____ by ______. - ANS-1960, Ted Maiman _________ reported in 1965 that a ruby laser could vaporize enamel. - ANS-Stern and Sognnaes First pulsed Nd:YAG laser released in ______ and cuts ______ tissue. - ANS-1990, soft tissue In _____ the first dental hard tissue was FDA cleared and is called _______. And the ______ laser a year later. - ANS-1997 Er: YAG laser Er, Cr: YSGG The word LASER is an acronym standing for _________. - ANS-Light Amplification by Stimulated Emission of Radiation Laser parameters include what 3 things? - ANS-1)Duration of exposure 2)Fiber Diameter 3)Wavelength Lasers are: ______chromatic? _____directional? coherent or noncoherent? emitted from a stimulated ____________. - ANS-monochromatic: made of a single wavelength (visible or infrared) unidirectional coherent (all peaks and valleys of each wave travel in unison) active medium What states can the active medium be in? - ANS-solid, gas, semiconductor What type of active medium is used in Er: YAG? - ANS-solid state using crystal matrix (erbium laced yttrium, aluminum and garnet) What type of gas is used when the active medium is sealed in an air tight chamber? - ANS-CO2 Continues...