Investigation on parameters affecting the performance of two dimensional photonic crystal based bandpass filter

Abstract

A two dimensional Photonic Crystal based Bandpass Filter is designed by exploiting coupling between the quasi waveguides and the circular Photonic Crystal Ring Resonator (PCRR). The output efficiency, resonant wavelength and bandwidth of PCBPF are investigated by varying the dielectric constant of the structure. The normalized transmission spectra of circular PCRR are taken using 2D Finite Difference Time Domain method. The Photonic Band Gap is calculated by Plane Wave Expansion method. Close to 100% (Band II) output efficiency is observed over the wavelength range from 1,504 to 1,521 nm and 85% (Band I) is obtained at 1,420 nm through simulation. The full width half maximum bandwidth of these bands is 35 and 20 nm, respectively. Further, the parameters that affect the resonant wavelength, output efficiency and bandwidth of the filter such as size of the reflector, radius of the coupling rods, lattice constant, rod radius and number of rods in the structure are analyzed. The overall size of the proposed filter is 11.4 μm × 10.2 μm, which is smaller than the filters already reported in the literature and highly desirable for Photonic Integrated Circuits.

Performance improvement of wavelength division multiplexing based on photonic crystal ring resonator

“…Photonic crystals (PhCs) which have the photonic band gap (PBG) because of their periodic structures have much focus in fabrication technologies [2]. Recently, Channel drop filters based on 2D photonic crystals with square and hexagonal lattices have attracted much attention [3][4][5][6]. In this regard, several kinds of CDF based on 2D photonic crystal ring resonator (PCRR) have been presented by using the quasisquare PCRR [7][8], square PCRR, dual square PCRR [9], dual curved PCRR [10], hexagonal PCRR [11], 45° PCRR [12], circular PCRR [3][4] and X-shaped PCRR [5].…”

Narrow band and angle-insensitive filter based on one-dimensional photonic crystal containing graded-index defect

“…[2][3][4][5][6] B. Xu, G. Zheng & Y. Wu Narrow-band filtering and multi-channel filtering technologies are of particular importance, as usually single or multiple narrow transmission bands arising within a relatively wide PBG region are highly desirable in the fields of optical precision measurement, optical wavelength division multiplexing systems and beyond. Up to now, many schemes [7][8][9][10][11][12] have been proposed to construct narrow band-pass photonic crystal filters. More recently, Liu et al 13 achieved a 15 nm shift for the pass band of an infrared tunable photonic crystal transmission filter by changing the thickness of the ITO defect layer.…”

100-Gb/s Wavelength Division Demultiplexing Using a Photonic Crystal Four-Channel Drop Filter

“…XTREMELY compact photonic crystal (PhC) based band-pass filters are attractive for their strong potential for large scale integration in wavelength division multiplexing (WDM) communication networks. Many theoretical and experimental works have reported very promising results [1][2][3][4][5][6][7] in particular with the realization of 4 channels WDM optical add-drop multiplexers (OADM) [2][3][4], demonstrating its technology readiness level. However, no system experiments were performed on these devices, except for single channel configurations [5,6] with filtering of 10 or 40 Gbit/s Non Return to Zero (NRZ) telecom signals.…”