Theoretical analysis of polarisation-insensitive wavelength conversion by four-wave mixing in photonic crystal fibre
Polarisation-insensitive wavelength conversion by four-wave mixing (FWM) has been demonstrated in a 20 m short nonlinear photonics crystal fibre. Theoretical analysis confirms that the combination of a 45° pump launch and a minimum pump-probe detuning is required to reduce the polarisation sensitivity of FWM to ∼1 dB.