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Thread: what is the wavelength of HeNe???

  1. #1
    Flashaholic* WildRice's Avatar
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    Default what is the wavelength of HeNe???

    Not a totally basic question here. I have been playing with HeNe's for over 15yrs. I have had red ones only ranging from .3mw to 9.7mw. I have always thought the wavelength was 632.3um. Well today I am working on a CO2 LASER system that has the old school alignment system. (ALL newer ones have crappy LD's). The laser module says 1mw 632.8um. Is there a small range that varies from maker to maker? Or have I always been wrong on the actual wavelength?

    Jeff
    "We cannot learn from one another, until we stop shouting at one another, until we speak quietly enough, so that our words can be heard, as well as our voices." R.M.Nixon 1969

  2. #2

    Default Re: what is the wavelength of HeNe???

    This chart will give wavelengths for various lasers HeNe included and according to the other links hene's can produce light in the IR and UV portions of the spectrum.
    http://www.lexellaser.com/techinfo_wavelengths.htm

    http://en.wikipedia.org/wiki/Helium-neon_laser
    http://www1.union.edu/~newmanj/laser.../GasLasers.htm

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    *Retired* The_LED_Museum's Avatar
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    Default Re: what is the wavelength of HeNe???

    Here are the visible wavelengths of HeNe (helium neon) lasers.
    They *ALWAYS* emit at these wavelengths, and do not vary whatsoever:

    Red HeNe lasers: 632.8nm (6,328┼).
    Orange HeNe lasers: 612nm (6,120┼)
    Yellow HeNe lasers: 594nm (5,940┼)
    Green HeNe lasers: 543.5nm (5,435┼)

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    Flashaholic* WildRice's Avatar
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    Default Re: what is the wavelength of HeNe???

    OK, so i guess i was wrong. but only by a few tenths of a um.

    Thanks

    Jeff
    "We cannot learn from one another, until we stop shouting at one another, until we speak quietly enough, so that our words can be heard, as well as our voices." R.M.Nixon 1969

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    Flashaholic* allthatwhichis's Avatar
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    Thumbs up Re: what is the wavelength of HeNe???

    Quote Originally Posted by The_LED_Museum
    Here are the visible wavelengths of HeNe (helium neon) lasers.
    They *ALWAYS* emit at these wavelengths, and do not vary whatsoever:

    Red HeNe lasers: 632.8nm (6,328┼).
    Orange HeNe lasers: 612nm (6,120┼)
    Yellow HeNe lasers: 594nm (5,940┼)
    Green HeNe lasers: 543.5nm (5,435┼)
    Again... You are the man!!!

  6. #6

    Default Re: what is the wavelength of HeNe???

    Quote Originally Posted by WildRice
    OK, so i guess i was wrong. but only by a few tenths of a um.

    Thanks

    Jeff
    Actually, it's nm, not um. There's a factor of 1000 lol.

    Sorry, I couldn't resist. But I know how easy it is to get that "n" upside down.
    Light a man a fire and you keep him warm for a night. Set a man on fire and you keep him warm for the rest of his life!
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    Flashaholic* WildRice's Avatar
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    Default Re: what is the wavelength of HeNe???

    Quote Originally Posted by bindibadgi
    Actually, it's nm, not um. There's a factor of 1000 lol.

    Sorry, I couldn't resist. But I know how easy it is to get that "n" upside down.
    DOH!!!
    "We cannot learn from one another, until we stop shouting at one another, until we speak quietly enough, so that our words can be heard, as well as our voices." R.M.Nixon 1969

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