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1. A general approach to low noise readout of terahertz imaging arrays
Topic: Optoelectronics
Published: 6/16/2011
Authors: Erich N Grossman, Jonathan D Chisum, Zoya Popovic
Abstract: This article describes the theory and design of an ultra-low noise electronic readout circuit for use with room temperature video-rate terahertz imaging arrays. First, the noise characteristics of various imaging detectors, including low resistan ...

2. Absolute Absorptivity of Single-walled Carbon Nanotubes Employing a Pyroelectric Detector
Topic: Optoelectronics
Published: 12/20/2006
Authors: Katie Hurst, Anne Dillon, John H Lehman
Abstract: Optical properties are important for determining fundamental characteristics of carbon single-walled nanotube (SWNT) samples including purity, chirality, and tube diameter. Previously, we have estimated the volume fraction of metallic versus semicond ...

3. Absorption, transmission, and scattering of expanded polystyrene at millimeter-wave and terahertz frequencies
Topic: Optoelectronics
Published: 3/17/2008
Authors: Charles Dietlein, Jon E. Bjarnason, Erich N Grossman, Zoya Popovic
Abstract: Conventional material measurements of transmission and reflection in the millimeter-wave and terahertz frequency range do not differentiate between scattering and absorption, grouping effects from both mechanisms together into 'loss'. Accurate knowle ...

4. Analysis of trace impurities in semiconductor gas via cavity-enhanced direct frequency comb spectroscopy
Topic: Optoelectronics
Published: 7/20/2010
Authors: Kristine A Bertness, Kevin C Cossel, F Adler, M J Thorpe, Jun Ye
Abstract: Cavity-enhanced direct frequency comb spectroscopy (CE-DFCS) has demonstrated powerful potential for trace-gas detection based on its unique combination of high bandwidth, rapid data acquisition, high sensitivity, and high resolution, which is unava ...

5. Analyzing quantitative light scattering spectra of phantoms measured with optical coherence tomography
Topic: Optoelectronics
Published: 3/1/2008
Authors: Tasshi Dennis, Shellee Dawn Dyer, Andrew Dienstfrey, Gurpreet Singh, Paul Rice
Abstract: We demonstrate the ability of multiple forms of optical coherence tomography (OCT) in the frequency domain to quantitatively size scatterers. Combined with a variety of distinct phantoms, we gain insight into the measurement uncertainties associated ...

6. Application of carbon nanotube coatings for laser measurements
Topic: Optoelectronics
Published: 10/17/2005
Authors: John H Lehman, Paul Rice, Natalia Varaksa, Chaiwat Engtrakul, Anne Dillon
Abstract: We have demonstrated coatings based on carbon nanotubes (CNTs) on a variety of detector platforms for laser power and energy measurement standards. These coatings must be resistant to damage and aging while maintaining desirable optical and thermal p ...

7. Applications of artificial neural networks in optical performance monitoring
Topic: Optoelectronics
Published: 8/15/2009
Authors: Jeffrey A Jargon, Xiaoxia Wu, Ronald Skoog, Loukas Paraschis, Alan Willner
Abstract: Applications using artificial neural networks (ANNs) for optical performance monitoring (OPM) are proposed and demonstrated. Simultaneous identification of optical signal-to-noise-ratio (OSNR), chromatic dispersion (CD), and polarization-mode-dispers ...

8. Bilateral comparison of power measurement standards for KrF lasers between PTB and NIST
Topic: Optoelectronics
Published: 5/2/2010
Authors: Marla L Dowell, Christopher L Cromer, Darryl A. Keenan, Stefan Kuck, Friedhelm Brandt
Abstract: We report results of the first bilateral laser power comparison for 248-nm KrF excimer lasers accomplished by the National Metrology Institutes of Germany (Physikalisch-Technische Bundesanstalt, PTB) and of the United States of America (National Inst ...

9. Calculation of pulse parameters and propagation of uncertainty
Topic: Optoelectronics
Published: 3/1/2009
Authors: Paul D Hale, Chih-Ming Wang
Abstract: The fundamental starting point for the analysis of all two-state waveforms is the determination of the low- and highstate levels. This is a two-step process. First, the data are grouped into points belonging to each state, and second, the value of ea ...

10. Calibration service for instruments that measure laser beam diameter
Series: Special Publication (NIST SP)
Report Number: 250-87
Topic: Optoelectronics
Published: 7/1/2010
Author: Shao Yang
Abstract: This document describes the calibration service for instruments that measure laser beam diameter. An overview of the measurement procedures, measurement system, and uncertainty analysis is presented. A sample measurement report is included in this do ...

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