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frequency-stabilized red HeNe laser | 632.8 nm wavelength
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File:He-ne-laser.svg - Wikimedia Commons
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Gas lasers
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HeNe Lasers: Red
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Helium-Neon Lasers
in He–Ne laser, metastable state exist in (1)He (2)Ne (3)both 1 and 2 (4) non
Helium-Neon Laser Tutorial
Laser He-Ne | PhysicsOpenLab
Helium neon laser - Generation Process and Energy Level
