Highly efficient energy conversion of the pump into the downshifted parametric Stokes radiation resulting from the phase-matched parametric four-photon mixing and subsequent perpendicular Raman amplification in a birefringent fiber is presented. We also observed significant polarization conversion from the fast y axis to the slow x axis of the birefringent fiber as a consequence of group-velocity-matched perpendicular Raman amplification of the x polarized parametric Stokes radiation by the y-polarized pump.
© 1989 Optical Society of America
Original Manuscript: February 2, 1989
Manuscript Accepted: May 18, 1989
Published: August 1, 1989
J. K. Chee and J. M. Liu, "Raman-assisted parametric frequency and polarization conversion in a birefringent fiber," Opt. Lett. 14, 820-822 (1989)