Wavelength dependent polarization properties of a long-period grating inscribed in a pure-fused-silica photonic crystal fiber

摘要: Measurements of polarization properties (polarization dependent loss and differential group delay) a long-period grating inscribed by means high-intensity femtosecond 264 nm pulses in an endlessly single mode photonic crystal fibre are reported. Strong modulation the spectra delay with periods 2.6 1.3 nm, respectively, were found. As such effect has not been observed standard optical fibres, it is believed that this due to specific structure holey used for fabrication.