Novel Four-Channel All Optical Demultiplexer Based on Square PhCRR for Using WDM Applications

Subject Areas : Journal of Optoelectronical Nanostructures

Vahid Fallahi ¹ , Mahmood Seifouri ²

1 - Faculty of Electrical Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran
2 - Faculty of Electrical Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran

Received: 2018-10-20 Accepted : 2019-01-21 Published : 2018-10-01

Keywords: Photonic Crystal, Ring Resonator, Demultiplexer, Wavelength Division Multiplexing (WDM), Plane Wave Expansion (PWE), Finite-Difference Time-Domain (FDTD),

Abstract :

Ring resonators have always been referred to as a highly flexible structure
for designing optical devices. In this study, we have designed and simulation a four
channel optical demultiplexer using square photonic crystal ring resonator. The square
lattice constant for this purpose structure is used. The purposed structure has an average
crosstalk, transmission coefficient, quality factor and channel spacing of -14.5 dB, 90%,
858 and 1.6 nm, respectively. To obtain the photonic band gap of the structure, the plane
wave expansion (PWE) method has been used and the finite-difference time-domain
(FDTD) method has been also used to analyze the optical behavior of the structure. The
good results obtained from designing and simulating optical demultiplexer structure
such as narrower channel spacing indicate the high flexibility of this structure and ring
resonator for being used in designing optical devices as well as their suitability for being
used in wavelength division multiplexing (WDM) systems.

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