TITLE:
PCRR Based Bandpass Filter for C and L+U Bands of ITU-T G.694.2 CWDM Systems
AUTHORS:
S. Robinson, R. Nakkeeran
KEYWORDS:
Photonic Crystal Ring Resonator, Photonic Bandgap, CWDM, Bandpass Filter, FDTD Method, PWE Method
JOURNAL NAME:
Optics and Photonics Journal,
Vol.1 No.3,
September
30,
2011
ABSTRACT: A two Dimensional (2D) Photonic Crystal Ring Resonator (PCRR) based Bandpass Filter (BPF) is designed to cover C and L+U bands of Coarse Wavelength Division Multiplexing (CWDM) systems. It is devised with two quasi waveguides and a circular PCRR. The simulation results are obtained using 2D Finite Difference Time Domain (FDTD) method. The Photonic Band Gap (PBG) is calculated by Plane Wave Expansion (PWE) method. The BPFs allow the entire C-band (BPF1) and L+U bands (BPF2), which are extended from 1530 to 1565 nm (C band) and 1565 to 1675 nm (L+U bands). The computed bandwidth of BPF1 and BPF2 is 32 nm and 97 nm respectively. The size of the device is minimized from a scale of few tens of millimeters to the order of micrometers. The overall size of the BPF1 is around 12.8 µm × 11.4 µm and 11.4 µm × 11.4 µm for BPF2.