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Questions and Answers
Er:YAG laser emits light with a wavelength of 2.94 µm
Er:YAG laser emits light with a wavelength of 2.94 µm
True
Titanium sapphire laser produces light mainly in the ultraviolet spectrum
Titanium sapphire laser produces light mainly in the ultraviolet spectrum
False
Chromium (III) ions are commonly used in lasers that emit light at 2.1 µm wavelengths
Chromium (III) ions are commonly used in lasers that emit light at 2.1 µm wavelengths
False
Nd:YAG laser emits light in the visible spectrum range
Nd:YAG laser emits light in the visible spectrum range
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Ytterbium-doped YAG crystals are known to produce light at 1030 nm
Ytterbium-doped YAG crystals are known to produce light at 1030 nm
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Cr4+ ions are commonly used in forsterite lasers emitting light at 1.1–1.37 µm wavelengths
Cr4+ ions are commonly used in forsterite lasers emitting light at 1.1–1.37 µm wavelengths
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Solid state lasers always use semi-conductors as the active media.
Solid state lasers always use semi-conductors as the active media.
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Nd:YAG is the abbreviation for neodymium-doped yttrium aluminum garnet.
Nd:YAG is the abbreviation for neodymium-doped yttrium aluminum garnet.
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Thin-disk lasers based on Yb:YAG can reach efficiencies above 60%.
Thin-disk lasers based on Yb:YAG can reach efficiencies above 60%.
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Glass systems generally outperform crystalline hosts in high energy output applications
Glass systems generally outperform crystalline hosts in high energy output applications
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Ruby lasers are commonly used in deep penetration welding applications.
Ruby lasers are commonly used in deep penetration welding applications.
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Argon ion lasers generally have wall-plug efficiencies around or below 0.1%.
Argon ion lasers generally have wall-plug efficiencies around or below 0.1%.
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Compared to YAG, glass has lower thermal conductivity
Compared to YAG, glass has lower thermal conductivity
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The laser wavelength must not be absorbed well by the workpiece for successful laser welding.
The laser wavelength must not be absorbed well by the workpiece for successful laser welding.
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The doping ability of glass to high concentration allows for greater energy storage per unit volume
The doping ability of glass to high concentration allows for greater energy storage per unit volume
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Neodymium has been incorporated into alkali-alkaline earth based glasses such as rubidium barium silicate glass
Neodymium has been incorporated into alkali-alkaline earth based glasses such as rubidium barium silicate glass
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For solid-state lasers, pumping is accomplished by electrical excitation.
For solid-state lasers, pumping is accomplished by electrical excitation.
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Rare earth elements with atomic numbers from 58 to 71 are commonly employed as ions in solid state lasers.
Rare earth elements with atomic numbers from 58 to 71 are commonly employed as ions in solid state lasers.
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High thermal conductivity allows glass systems to extract the largest amount of energy in large laser systems
High thermal conductivity allows glass systems to extract the largest amount of energy in large laser systems
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There are three typical regimes of operation mentioned: normal pulse mode, Q-switched operation, and femtosecond pulse operation.
There are three typical regimes of operation mentioned: normal pulse mode, Q-switched operation, and femtosecond pulse operation.
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Host materials for solid state lasers are typically in the form of a spherical rod.
Host materials for solid state lasers are typically in the form of a spherical rod.
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A narrow fluorescent line width is unfavorable for laser operation.
A narrow fluorescent line width is unfavorable for laser operation.
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