A helium-neon laser has a power output of 1mW of light of wavelength 632.8 nm. Q. - YouTube
Helium Neon laser - Construction and Working
HeNe laser emits light of a wavelength 632.8 nm and has an output power of 2.3 MW. How many photons are emitted each minute by this laser when operated? - Quora
Calibration and Testing of Laser Wavelength Standards - PTB.de