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Now showing items 1-10 of 104
Label-free DNA sequence detection using oligonucleotide functionalized optical fiber
(AIP Publishing, 2006-10-01)
The authors present a label-free method for direct detection of deoxyribonucleic acid (DNA) sequences. The capture DNA is immobilized onto the surface of a silica optical fiber tip by means of the layer-by-layer electrostatic ...
Fundamental-limit perspectives on ultrawideband antennas
(American Geophysical Union, 2009-02-25)
The fundamental-limit theory of antennas provides a theoretical limit to assist in the evaluation of antenna performance in terms of antenna size, fractional impedance bandwidth, and gain. The limit is very useful in ...
Implementation Of A Loss-Compensated Recirculating Delayed Self-Heterodyne Interferometer For Ultranarrow Laser Linewidth Measurement
(Optical Society of America, 2006-12-01)
Ultranarrow laser linewidth measurement using an optimized loss-compensated recirculating delayed self-heterodyne interferometer is described. An experimental setup is constructed to measure subkilohertz laser linewidths. ...
Low Frequency Oscillations in A Plasma with Spatially Variable Field-Aligned Flow
(AIP Publishing, 2002-05-01)
The effects of a transverse gradient in the plasma flow velocity parallel to the ambient magnetic field are analyzed. A transverse velocity gradient in the parallel ion flow, even in small magnitude, can increase the ...
Optimal Dispersion Precompensation By Pulse Chirping
(Optical Society of America, 2002-03-01)
For the procedure of dispersion precompensation in fibers by prechirping, we found that there is a maximum distance over which a pulse initially compressed by prechirping can return to its original width. The distance ...
ECE 2005 Annual Report
(Bradley Department of Electrical and Computer Engineering, 2005)
Optical Sectioning For Optical Scanning Holography Using Phase-Space Filtering with Wigner Distribution Functions
(Optical Society of America, 2008-10-01)
We propose a novel optical sectioning method for optical scanning holography, which is performed in phase space by using Wigner distribution functions together with the fractional Fourier transform. The principle of ...
Fast-Fourier-Transform Based Numerical Integration Method For The Rayleigh-Sommerfeld Diffraction Formula
(Optical Society of America, 2006-08-01)
The numerical calculation of the Rayleigh-Sommerfeld diffraction integral is investigated. The implementation of a fast-Fourier-transform (FFT) based direct integration (FFT-DI) method is presented, and Simpson's rule is ...
Frequency-Estimation-Based Signal-Processing Algorithm For White-Light Optical Fiber Fabry-Perot Interferometers
(Optical Society of America, 2005)
A novel signal-processing algorithm based on frequency estimation of the spectrogram of single-mode optical fiber Fabry-Perot interferometric sensors under white-light illumination is described. The frequency-estimation ...
Balanced reconnection intervals: four case studies
(Copernicus Publications, 2008)
During steady magnetospheric convection (SMC) events the magnetosphere is active, yet there are no data signatures of a large scale reconfiguration, such as a substorm. While this definition has been used for years it fails ...