Wavelength-Selective Device Using a Phase Delay Layer and Two Polarization-Sensitive Gratings

Wavelength-selective optical device comprising an optimal phase delay layer (PDL) and two polarization-sensitive gratings has been reported and experimentally demonstrated. In our method, two incident wavelengths have orthogonal polarization states after through PDL and have diffracted by different gratings, independently. From the experimental results, the intensity ratios at 660 nm are 1.171 and 0.0072 for p- and s-polarization, meanwhile, the ratios at 780 nm are 1.980 for s-polarization and 0.084 for p-polarization state, respectively