Ultra-Wideband Bandpass Filter with Notched Band Based on Electrooptic Phase Modulator and Phase-Shift Fiber Bragg Grating

Ni, Jiasheng; Chen, B.; Zheng, Shilie; Zhang, X. M.; Jin, Xiaofeng; Chi, Hao

doi:10.1163/156939310791036395

Cited by 11 publications

(5 citation statements)

References 14 publications

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“…Finally, we note that this study of thickness fluctuations in photonic crystals can be applied to the design of any one-dimensional, photonic, micro-and nano-devices such as photonic crystal mirrors [23][24][25], tunable bandpass filters [26,27], polarizers [28,29] and multichannel filters [30] for application over a wide electromagnetic spectral range. We note that omnidirectional reflectors can be obtained even for a high optical contrast 1D PC (e.g., grooved Si) by introducing a third regular component into the structure (for example by oxidation of Si walls, see Ref.…”

Section: Resultsmentioning

confidence: 97%

Influence of Fluctuations of the Geometrical Parameters on the Photonic Band Gaps in One-Dimensional Photonic Crystals

Tolmachev¹,

Baldycheva²,

Berwick³

et al. 2012

PIER

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Abstract-The influence of random fluctuations in the layer thicknesses in high contrast, one-dimensional Photonic Crystals (PCs) on the transmission spectra and Photonic Band Gaps (PBGs) is investigated. The change in the PBGs depends on the magnitude of the fluctuations and increases with an increase in the order of the PBG. Introducing thickness non-uniformity into the PC of up to 0.004 times the value of lattice constant for different types of fluctuation distributions has a negligible effect on either the position or the shape of the 1st and nearest PBGs. The approach suggested here allows the determination of the tolerances required in the geometrical parameters of PCs during fabrication. It also allows the optimisation of PC structures using high order PBGs.

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Section: Resultsmentioning

confidence: 97%

Influence of Fluctuations of the Geometrical Parameters on the Photonic Band Gaps in One-Dimensional Photonic Crystals

Tolmachev¹,

Baldycheva²,

Berwick³

et al. 2012

PIER

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show abstract

“…Finally, we note that the demonstrated electrotunable model of Fabry-Perot resonator can be applied to the realization of any one-dimensional photonic micro-and nano-devices such as tunable bandpass filters [29,30], photonic crystal mirrors [31,32], polarizers [33], polarizing beam splitters [34,35], channel-drop filters [36] and multichanneled filters [37] for application in the wide electro-magnetic spectral range.…”

Section: Results Analysismentioning

confidence: 99%

Electrically Tunable Fabry-Perot Resonator Based on Microstructured Si Containing Liquid Crystal

Tolmachev¹,

Melnikov²,

Baldycheva³

et al. 2012

PIER

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Abstract-We have built Fabry-Pérot resonators based on microstructured silicon and a liquid crystal. The devices exhibit tuning of the resonance peaks over a wide range, with relative spectral shifts of up to ∆λ/λ = 10%. In order to achieve this substantial spectral shift, cavity peaks of high order were used. Under applied voltages of up to 15 V, a variation in the refractive index of the nematic liquid crystal E7 from ∆n LC = 0.12 to ∆n LC = 0.17 was observed. These results may have practical applications in the near-, mid and far-infrared range.

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“…The traditional method for this purpose is the fixed notch filter [20][21][22][23][24] which needs to be tuned to the frequency of the interference. Especially in the two close targets scenario, the frequencies of different human respiration signals are really close, so the notch is required to be very sharp.…”

Section: Adaptive Cancellationmentioning

confidence: 99%

Analysis of Characteristics of Two Close Stationary Human Targets Detected by Impulse Radio Uwb Radar

Li¹,

Jing²,

Lv³

et al. 2012

PIER

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Abstract-The detection and identification of multi-stationary human targets with IR-UWB radar is a new and important technology. This paper is focused on the detection and identification of two close stationary human targets by using monostatic IR-UWB radar with low center frequency. For this purpose, the characteristics of the radar echoes from two close stationary human targets are processed and analyzed. Furthermore, the effect that the interference behind the anterior target affects the signal of posterior target is represented, and the features of this interference are interpreted. According to the analyses, a method using adaptive cancellation is proposed to attenuate the interference and improve the detection and identification of two close stationary human targets. Series of experiments are done in different scenarios, and the results of the experiments are presented to demonstrate the validity of the method. It has been shown that the proposed method can attenuate the interference and make the detection and identification of multi-human targets more precise.

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Ultra-Wideband Bandpass Filter with Notched Band Based on Electrooptic Phase Modulator and Phase-Shift Fiber Bragg Grating

Cited by 11 publications

References 14 publications

Influence of Fluctuations of the Geometrical Parameters on the Photonic Band Gaps in One-Dimensional Photonic Crystals

Influence of Fluctuations of the Geometrical Parameters on the Photonic Band Gaps in One-Dimensional Photonic Crystals

Electrically Tunable Fabry-Perot Resonator Based on Microstructured Si Containing Liquid Crystal

Analysis of Characteristics of Two Close Stationary Human Targets Detected by Impulse Radio Uwb Radar

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