Results on wavelength shifters based on four-wave mixing that operate
in the 1.5-mu m regime are reported, These devices utilize the near-ba
ndedge resonant enhancement in the third-order nonlinearity in passive
InGaAsP-InP quantum-well waveguides. Over the erbium-doped fiber-ampl
ifier gain band approximately -20 dB conversion efficiency was obtaine
d with approximate to 18-dBm CW pump power. The conversion efficiency
was nearly constant for wavelength shifts up to approximate to 26 nm (
3.3 THz), limited by the phase-matching bandwidth of the 8.5-mm-long d
evice.