Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Tracy S. Clement"'
Autor:
Dylan F. Williams, D.A. Keenan, Jack C. M. Wang, Tracy S. Clement, Paul D. Hale, Andrew Dienstfrey, Arkadiusz Lewandowski
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 58:3554-3568
We describe a method for calibrating the voltage that a step-like pulse generator produces at a load at every time point in the measured waveform. The calibration includes an equivalent-circuit model of the generator that can be used to determine how
Autor:
Sae Woo Nam, Martin J. Stevens, Richard P. Mirin, Thomas Gerrits, Robert H. Hadfield, Tracy S. Clement
Publikováno v:
Journal of Modern Optics. 56:358-363
We report optical characterization of NbN nanowire superconducting single-photon detectors as a function of wavelength in the near infrared. System detection efficiency decreases from ∼6% at 1.15 µm to ∼2% at 1.72 µm, while timing jitter remain
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 56:515-521
We characterize a 50-GHz comb generator with a sampling oscilloscope. With careful control of the input power, input harmonics, and comb generator temperature, we measure the output spectrum with a standard uncertainty of 0.1 dB and 0.5deg. We correc
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 55:1951-1957
We use traceable swept-sine and electrooptic-sampling-system-based sampling-oscilloscope calibrations to measure the systematic error of the nose-to-nose calibration, and compare the results to simulations. Our results show that the errors in the nos
Autor:
Andrew Dienstfrey, Chih-Ming Wang, Dylan F. Williams, Paul D. Hale, D.A. Keenan, Tracy S. Clement
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 54:3173-3181
We calibrate the magnitude and phase response of equivalent-time sampling oscilloscopes to 110 GHz. We use a photodiode that has been calibrated with our electrooptic sampling system as a reference input pulse source to the sampling oscilloscope. We
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 54:3197-3208
We describe an algorithm for determining the minimum phase of a linear time-invariant response function from its magnitude. The procedure is based on Kramers-Kronig relations in combination with auxiliary direct measurements of the desired phase resp
Autor:
Jack C. M. Wang, H. Khenissi, Dylan F. Williams, Kate A. Remley, Paul D. Hale, J.P. Dunsmore, Tracy S. Clement, F. Ndagijimana
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 54:1210-1217
We describe a straightforward method of separately characterizing up- and down-conversion in microwave mixers using a sampling oscilloscope. The method mismatch-corrects the results, determines both magnitude and phase, and uses a novel time-base cor
Autor:
Paul D. Hale, Andrew Dienstfrey, Dylan F. Williams, Tracy S. Clement, D.A. Keenan, Arkadiusz Lewandowski, J.M. Morgan, Jack C. M. Wang
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 54:481-491
We develop a covariance matrix describing the uncertainty of mismatch-corrected measurements performed on the National Institute of Standards and Technology's electrooptic sampling system. This formulation offers a general way of describing the uncer
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 53:1384-1389
We develop a method for mismatch-correcting temporal waveforms measured with a high-speed electrooptic sampling system to 200 GHz. The new calibration determines a complete equivalent-circuit model describing the source in both the time and frequency
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 52:1537-1547
We estimate the root-mean-square (RMS) value of timing jitter noise in simulated signals similar to measured high-speed sampled signals. The simulated signals are contaminated by additive noise, timing jitter noise, and time shift errors. Before esti