LASER CERTIFICATION ACTUAL
COMPREHENSIVE STUDY GUIDE 2026
◉ Theorized that an excited electron will spontaneously return to its
ground state
Answer: Bohr
◉ First ruby laser was created in _____ by ______.
Answer: 1960, Ted Maiman
◉ _________ reported in 1965 that a ruby laser could vaporize enamel.
Answer: Stern and Sognnaes
◉ First pulsed Nd:YAG laser released in ______ and cuts ______ tissue.
Answer: 1990, soft tissue
◉ In _____ the first dental hard tissue was FDA cleared and is called
_______. And the ______ laser a year later.
Answer: 1997
Er: YAG laser
Er, Cr: YSGG
,◉ The word LASER is an acronym standing for _________.
Answer: Light Amplification by Stimulated Emission of Radiation
◉ Laser parameters include what 3 things?
Answer: 1)Duration of exposure
2)Fiber Diameter
3)Wavelength
◉ Lasers are:
______chromatic?
_____directional?
coherent or noncoherent?
emitted from a stimulated ____________.
Answer: 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?
Answer: solid, gas, semiconductor
, ◉ What type of active medium is used in Er: YAG?
Answer: 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?
Answer: CO2
◉ Diode lasers have what type of active medium?
Answer: semiconductor
◉ what photons form the laser?
Answer: light that leaks from the output coupler
◉ Stimulated emission:
Answer: atoms of the active medium are stimulated to a higher
energy level--> released as a photon as the atom returns to a more
stable lower energy level.
◉ Amplification
Answer: Released photons can go on to stimulate more atoms in the
crystal, thus producing more photons
COMPREHENSIVE STUDY GUIDE 2026
◉ Theorized that an excited electron will spontaneously return to its
ground state
Answer: Bohr
◉ First ruby laser was created in _____ by ______.
Answer: 1960, Ted Maiman
◉ _________ reported in 1965 that a ruby laser could vaporize enamel.
Answer: Stern and Sognnaes
◉ First pulsed Nd:YAG laser released in ______ and cuts ______ tissue.
Answer: 1990, soft tissue
◉ In _____ the first dental hard tissue was FDA cleared and is called
_______. And the ______ laser a year later.
Answer: 1997
Er: YAG laser
Er, Cr: YSGG
,◉ The word LASER is an acronym standing for _________.
Answer: Light Amplification by Stimulated Emission of Radiation
◉ Laser parameters include what 3 things?
Answer: 1)Duration of exposure
2)Fiber Diameter
3)Wavelength
◉ Lasers are:
______chromatic?
_____directional?
coherent or noncoherent?
emitted from a stimulated ____________.
Answer: 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?
Answer: solid, gas, semiconductor
, ◉ What type of active medium is used in Er: YAG?
Answer: 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?
Answer: CO2
◉ Diode lasers have what type of active medium?
Answer: semiconductor
◉ what photons form the laser?
Answer: light that leaks from the output coupler
◉ Stimulated emission:
Answer: atoms of the active medium are stimulated to a higher
energy level--> released as a photon as the atom returns to a more
stable lower energy level.
◉ Amplification
Answer: Released photons can go on to stimulate more atoms in the
crystal, thus producing more photons
