#helium–neon_laser
Helium–neon laser
Type of gas laser
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 of helium and neon at a total pressure of approximately 1 Torr inside a small electrical discharge. The best-known and most widely used He-Ne laser operates at a wavelength of 632.8 nm, in the red part of the visible spectrum.
Sun 25th
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