UV laser wavelength standard based on frequency doubling of He-Ne laser at 632.8 nm
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Helium-Neon Laser - an overview | ScienceDirect Topics
On the performance of wavelength meters: Part 2—frequency-comb based characterization for more accurate absolute wavelength determinations | SpringerLink
Solved The light emitted by a helium neon laser has a | Chegg.com
Comb-referenced laser distance interferometer for industrial nanotechnology | Scientific Reports
Helium Neon laser construction and working I 3 Advantage and disadvantage.