Angle-tuned type II external-cavity frequency doubling without temperature stabilization. Academic Article uri icon


  • We report frequency doubling of a low-power cw diode laser at 1064 nm in an external ring cavity by use of an angle-tuned KTP type II crystal. We demonstrate a new setup that requires no temperature stabilization of the crystal. An intracavity lambda/2 plate rotates the polarization of the fundamental after each cavity round trip by 90 degrees; this provides the two eigenpolarizations of the crystal required for a type II nonlinear process. As a result, it is possible to maintain the resonance condition by use of a standard locking circuit.

published proceedings

  • Appl Opt

author list (cited authors)

  • Emery, Y., Fleischhauer, A., Walther, T., & Fry, E. S.

citation count

  • 3

complete list of authors

  • Emery, Y||Fleischhauer, A||Walther, T||Fry, ES

publication date

  • January 1999