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The active laser medium (also called a gain medium or lasing medium) is the source of optical gain within a laser. The gain results from the stimulated emission of photons through electronic or molecular transitions to a lower energy state from a higher energy state previously populated by a pump source .
Er:YAG laser rod. An Er:YAG laser (erbium-doped yttrium aluminium garnet laser, erbium YAG laser) is a solid-state laser whose active laser medium is erbium-doped yttrium aluminium garnet (Er:Y 3 Al 5 O 12). Er:YAG lasers typically emit light with a wavelength of 2940 nm, which is infrared light. [1]
The LaserActive 3-D Goggles (model GOL-1) employ an active shutter 3D system compatible with at least six 3D-ready LD-ROM software titles: 3-D Museum (1994), Vajra 2 (1994), Virtual Cameraman 2 (1994), Dr. Paolo No Totteoki Video (1994), Goku (1995), and 3D Virtual Australia (1996), the last software title published for the LaserActive.
The Nd:YAG laser is the most common laser used in laser designators and laser rangefinders. During the Iran–Iraq War, Iranian soldiers suffered more than 4000 cases of laser eye injury, caused by a variety of Iraqi sources including tank rangefinders. The 1064 nm wavelength of Nd:YAG is thought to be particularly dangerous, as it is invisible ...
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Laser types with distinct laser lines are shown above the wavelength bar, while below are shown lasers that can emit in a wavelength range. The height of the lines and bars gives an indication of the maximal power/pulse energy commercially available, while the color codifies the type of laser material (see the figure description for details).
The companies claimed, among other things, that the health warnings violated their free speech rights by compelling the companies to endorse the U.S. government's anti-smoking message through ...
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