Wavelength Conversion: PPLN waveguide wavelength-conversion efficiency improves by a factor of 20

John Wallace, Senior Editor, LaserFocusWorld

One of the most effective nonlinear optical crystals for wavelength conversion of light in the near-infrared (near-IR) and visible spectral regions is periodically poled lithium niobate (PPLN), in which periodic domain inversions (within which the crystal’s electric dipoles align) in the LN crystal are produced using a series of electrodes. The periodic poling, in which every other domain is flipped, allows light to be quasi-phase-matched (QPM) so that the frequency-converted light does not destructively interfere with itself as it travels through the crystal.

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https://www.laserfocusworld.com/articles/print/volume-54/issue-12/world-...

Last modified Tue, 29 Jan, 2019 at 12:11