A helium–neon laser or He-Ne laser is a type of gas laser whose high energetic medium gain medium consists of a mixture of ratio (between 5:1 and 20:1)...

the naturally occurring members of group 18 of the periodic table: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). Under...

amplify light coherently. Gas lasers using many different gases have been built and used for many purposes. The helium–neon laser (HeNe) can operate at many...

emission line is responsible for the characteristic red light of helium–neon lasers. Although neon has some applications in plasma tubes and as a refrigerant...

gas such as hydrogen or nitrogen to a helium–oxygen mixture. Helium–neon lasers, a type of low-powered gas laser producing a red beam, had various practical...

metastable He(23S1). Substituting helium with other noble gases, such as neon or argon, does not lead to an enhancement of laser output. Because the excitation...

Laser linewidth is the spectral linewidth of a laser beam. Two of the most distinctive characteristics of laser emission are spatial coherence and spectral...

forming a Fabry–Pérot resonator. Unlike helium–neon lasers, the energy level transitions that contribute to laser action come from ions. Because of the...

"Reportage - Il était une fois le néon No. 402". Retrieved 2010-12-06. Claude lit the peristyle of the Grand Palais in Paris with neon tubes; this webpage includes...

A chemical laser is a laser that obtains its energy from a chemical reaction. Chemical lasers can reach continuous wave output with power reaching to megawatt...