We demonstrate upconversion from 1.56 to 0.633 μm that preserves the polarization state of an arbitrarily polarized input. The upconverter uses bidirectional sum-frequency generation in bulk periodically poled lithium niobate and a Michelson interferometer to stabilize the phase.
© 2006 Optical Society of America
Original Manuscript: July 28, 2005
Revised Manuscript: November 3, 2005
Manuscript Accepted: December 5, 2005
Marius A. Albota, Franco N. C. Wong, and Jeffrey H. Shapiro, "Polarization-independent frequency conversion for quantum optical communication," J. Opt. Soc. Am. B 23, 918-924 (2006)