An ion laser is a
gas laser which uses an
ionized gas as its lasing medium. Like other gas lasers, ion lasers feature a sealed cavity containing the laser medium and mirrors forming a
Fabry-Perot resonator. Unlike
HeNe lasers, the energy level transitions that contribute to laser action come from
ions. Because of the large amount of energy required to excite the ionic transitions used in ion lasers, the required current is much greater, and as a result all but the smallest ion lasers are
water cooled. A small air cooled ion laser might produce, for example, 130mW of light with a tube current of 10A @ 105V. This is a total power draw over 1 kW, which translates into a large amount of heat which must be dissipated.
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laser light produced from argon gas. Nine separate wavelengths in the blue-green visible light spectrum are produced, but the main wavelengths are 488.0 nm blue and 514.5-nm pea green light.
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