1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Wavelength doubling laser?

  1. May 2, 2014 #1
    I've heard of frequency doubling but is wavelength doubling a thing? If so, how efficient?
  2. jcsd
  3. May 2, 2014 #2


    User Avatar
    Science Advisor
    Gold Member

    Frequency doubling divides the wavelength in half: http://www.rp-photonics.com/frequency_doubling.html

    The inverse process also works, and is usually called parametric down conversion:

    Your green laser pointer is an example of frequency doubling/second harmonic generation:
    See the schematic diagram on the right hand side - enlarge, and follow the red beam into the crystal which generates the green beam.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook