Experimental Demonstration of a Holographic Demultiplexer With Low Polarization-Dependence Loss Using a Long-Period Diffraction Grating

We describe the results of a holographic demultiplexer (DeMux) focused on the low polarization-dependence loss (PDL) using long-period volumetric diffraction grating. A 0.8-nm-spaced 21-channel holographic DeMux with PDL of less than -0.38 dB, channel uniformity of 0.495 dB, and channel crosstalk of -13 dB has been demonstrated