A novel eight-channel demux device based on multicore photonic crystal fiber (PCF) structures that operate in the C-band range (1530⁻1565 nm) has been demonstrated. The PCF demux design is based on replacing some air-hole areas with lithium niobate and silicon nitride materials over the PCF axis alongside with the appropriate optimizations of the PCF structure. The beam propagation method (BPM) combined with Matlab codes was used to model the demux device and optimize the geometrical parameters of the PCF structure. The simulation results showed that the eight-channel demux can be demultiplexing after light propagation of 5 cm with a large bandwidth (4.03⁻4.69 nm) and cross-talk (-16.88 to -15.93 dB). Thus, the proposed device has great potential to be integrated into dense wavelength division multiplexing (DWDM) technology for increasing performances in networking systems.
Keywords: demultiplexer; dense wavelength division multiplexing; photonic crystal fiber.