Polarization-demultiplexed two-color frequency conversion of femtosecond pulses in birefringent photonic-crystal fibers.
Birefringent photonic-crystal fibers provide efficient polarization-sensitive anti-Stokes frequency conversion of unamplified 35-fs Ti: sapphire laser pulses, giving rise to a doublet of intense blue-shifted emission spectral lines centered at 490 and 510 nm. We show that this anti-Stokes doublet can be wavelength-demultiplexed by a polarizationseparating prism. Generation of the 510-nm signal is decoupled from frequency conversion to 490 nm by accurately polarizing the pump field along one of the principal axes of the elliptically deformed fiber core.
Hu
Ming-Lie
ML
Wang
Ching-Yue
CY
Li
Yan-Feng
YF
Chai
Lu
L
Zheltikov
Aleksei
A