Second order add/drop filter with a single ring resonator

2017 ◽  
Author(s):  
Matteo Cherchi ◽  
Fei Sun ◽  
Markku Kapulainen ◽  
Tapani Vehmas ◽  
Mikko Harjanne ◽  
...  
Keyword(s):  
Ring Resonator ◽  
Second Order ◽  
Single Ring

Analysis of a second-order polarization-independent filter made of a single ring resonator and a Sagnac interferometer

2006 ◽  
Vol 260 (2) ◽  
pp. 567-570 ◽  
Author(s):  
Fufei Pang ◽  
Feng Liu ◽  
Xiuyou Han ◽  
Haiwen Cai ◽  
Ronghui Qu ◽  
...  
Keyword(s):  
Ring Resonator ◽  
Second Order ◽  
Sagnac Interferometer ◽  
Single Ring ◽  
Polarization Independent

Negative Permeability of Single-ring Split Ring Resonator in the Visible Light Frequency Region

2006 ◽  
Vol 919 ◽  
Author(s):  
Takuo Tanaka ◽  
Atsushi Ishikawa ◽  
Satoshi Kawata
Keyword(s):  
Visible Light ◽  
Magnetic Permeability ◽  
Filling Factor ◽  
Ring Resonator ◽  
Split Ring Resonator ◽  
Frequency Region ◽  
Visible Range ◽  
Split Ring ◽  
Single Ring ◽  
Internal Impedance

AbstractNegative permeability of single-ring split ring resonator (s-SRR) is theoretically investigated in the visible light frequency region [1, 2]. To estimate magnetic responses of conductive elements precisely, we determined internal impedance by considering the delay of the current inside the metal structure. The increase of the surface resistivity, which is the real part of the internal impedance, results in the decrease of the resonator's Q-value. This means the degradation of the tunable range of the permeability. The increase of the internal reactance results in the reduction of the resonant frequency. In our calculation, the surface resistivity saturates at the inherent frequency of each metal as the frequency increases. On the silver case, the saturation value is 0.4 Ω and this value is remarkably smaller than that of gold and copper. On the other hand, the internal reactance is increasing as the frequency increases independently of metal. We concluded that the internal reactance is dominant factor to realize the negative magnetic permeability in the optical frequency region. We also show the frequency dependence of the magnetic permeability of s-SRRs. In the case of s-SRRs made of copper, the minimum value of the magnetic permeability becomes positive value at 550 THz even in the high filling factor condition (11%). In the case of s-SRRs made of gold, only on the filling factor was 11%, the minimum value of the magnetic permeability takes negative value in the entire visible range. On the other hand, the silver SRR exhibits negative magnetic permeability in the visible range even under the low filling factor condition of 3%. Moreover, we concluded that reducing the geometrical capacitance and using silver for SRR are necessary to realize the negative magnetic permeability in the visible light range.

Design and Analysis of Dual-Mode Double-Ring Resonator for Dual-Band Bandpass Filter Applications

2013 ◽  
Vol 321-324 ◽  
pp. 376-382
Author(s):  
Ming Wei Hsu ◽  
Man Long Her ◽  
Wen Ko ◽  
Yu Lin Wang
Keyword(s):  
Bandpass Filter ◽  
Ring Resonator ◽  
Relative Dielectric Constant ◽  
Capacitive Coupling ◽  
Ring Resonators ◽  
Dual Band ◽  
Center Frequency ◽  
Dual Mode ◽  
Double Ring ◽  
Single Ring

In this paper, two types of miniaturized dual-mode bandpass filters (BPF), a single-ring (SR) resonator, and a double-ring (DR) resonator are developed. By applying the capacitive-coupling technique to a dual-mode ring filter, a technique is proposed to miniaturize the dual-mode double-ring filter. An adjustable dual-band bandpass filter is achieved by developing a ring resonator where the two modes are capacitively coupled. Control of the filter center frequency is determined by the diameter of the ring and by the rings annular width. Filter coupling amount can also be adjusted by disturbance (perturbation) of an open stub attached to the annular disc. Proposed filters explore both single- and double-ring architectures. A single-ring resonator acting as a dual bandpass filter to allow 3.8 GHz and 7.8 GHz single is developed. A double-ring resonator to allow 2.05 GHz and 3.9 GHz signals is also developed. The ring resonators are fabricated on RO-4003 substrate, with relative dielectric constant of 3.38, thickness of 0.8 mm, and dielectric loss tangent of 0.0025. Results indicate the filters can be applied in the communications field.

scholarly journals Flat-top optical resonance in a single-ring resonator based on manipulation of fast- and slow-light effects

2018 ◽  
Vol 26 (18) ◽  
pp. 23215 ◽  
Author(s):  
Menghao Huang ◽  
Simin Li ◽  
Min Xue ◽  
Lei Zhao ◽  
Shilong Pan
Keyword(s):  
Slow Light ◽  
Ring Resonator ◽  
Optical Resonance ◽  
Single Ring ◽  
Light Effects

Tunable Fano resonance in a single-ring-resonator-based add/drop interferometer

2013 ◽  
Vol 52 (20) ◽  
pp. 4884 ◽  
Author(s):  
Kaiyang Wang ◽  
Xiaoqi Liu ◽  
Changqiu Yu ◽  
Yundong Zhang
Keyword(s):  
Fano Resonance ◽  
Ring Resonator ◽  
Single Ring
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