Abstract
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.
Highlights
Dense wavelength division multiplexing (DWDM) is a system [1,2] that is used to integrate information from different sources over one fiber, while each source carried on its own divided light wavelength at the same time
Researchers have shown the potential of designing demux-based waveguide techniques such as silicon photonics [5], Y-branch [6], multimode interference (MMI) [7,8,9], Mach–Zehnder interferometers [10,11], MMI in slot waveguide structures [12,13,14], etc
The main benefit of designing a demux device based on a Photonic crystal fiber (PCF) structure is its ability to integrate different materials that have a high difference in their refractive index values
Summary
Dense wavelength division multiplexing (DWDM) is a system [1,2] that is used to integrate information from different sources over one fiber, while each source carried on its own divided light wavelength at the same time. The main benefit of designing a demux device based on a PCF structure is its ability to integrate different materials that have a high difference in their refractive index values. This is because the light guiding mechanism in PCF is based on the bandgap and modified total internal reflection (MTIR). Another advance is the ability to achieve a lower coupling length, especially in the case of closer coupled ports (cores) [19]
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