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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 .
The ruby laser is a three level solid state laser. The active laser medium (laser gain/amplification medium) is a synthetic ruby rod that is energized through optical pumping, typically by a xenon flashtube. Ruby has very broad and powerful absorption bands in the visual spectrum, at 400 and 550 nm, and a very long fluorescence lifetime of 3 ...
Laser in original colours, as delivered in the 1970s Sailor hiking out on a Laser Radial. The ILCA is manufactured by a number of different companies. As of April 2023 these were Devoti Sailing s.r.o., Czech Republic, Element 6 Evolution Co., Ltd., Thailand, Far East Boats, P. R. China, Nautivela srl, Italy, Ovington Boats Ltd, Great Britain, Performance Sailcraft Australia, Performance ...
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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]
Laser rods (from left to right): Ruby, alexandrite, Er:YAG, Nd:YAG. A solid-state laser is a laser that uses a gain medium that is a solid, rather than a liquid as in dye lasers or a gas as in gas lasers. [1] Semiconductor-based lasers are also in the solid state, but are generally considered as a separate class from solid-state lasers, called ...
The Laser Radial or ILCA 6 is a popular one-design class of small sailing dinghy, originally built by Laser Performance and World sailing approved manufactures. It is a singlehanded boat, meaning that it is sailed by one person.
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