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Metrology

Optical/photometry/laser metrology

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Displaying 201 - 225 of 383

Optomechanical Raman-Ratio Thermometry

September 9, 2015
Author(s)
Katarina Cicak, Thomas P. Purdy, Pen Li Yu, Nir Kampel, Bob Peterson, Raymond Simmonds, Cindy Regal
The temperature dependence of the asymmetry between Stokes and anti-Stokes Raman scattering can be exploited for self-calibrating, optically-based thermometry. In the context of cavity optomechanics, we observe the cavity-enhanced scattering of light

Quantitative tool characterization of a 193 nm scatterfield microscope

September 9, 2015
Author(s)
Martin Sohn, Bryan Barnes, Hui Zhou, Richard Silver
Optical microscope tool characterization has been investigated for the quantitative measurements of deep sub-wavelength features using a Fourier plane normalization method. The NIST 193 nm scatterfield microscope operating with an ArF Excimer laser, which

Calibration procedure for UV-365 integrated irradiance measurements

September 8, 2015
Author(s)
George P. Eppeldauer, Thomas Larason, Robert Vest, Uwe Arp, Howard Yoon
Since the CIE standardized rectangular-shape spectral response function for the 320 nm to 400 nm wavelength range can be realized only with large spectral mismatch, the realized UV-A meters have different response functions resulting in large errors in

Optomechanical reference accelerometer

September 8, 2015
Author(s)
Oliver Gerberding, Felipe Guzman, John T. Melcher, Jon R. Pratt, Jacob Taylor
We present an opto-mechanical accelerometer device with high dynamic range, high bandwidth and readout noise levels exceeding 10 μg/√Hz . The straightforward assembly and small cost of our device make it a prime candidate to perform on-site calibrations

Standardization of UV LED measurements

September 8, 2015
Author(s)
George P. Eppeldauer, Thomas Larason, Howard Yoon
Traditionally used source spectral-distribution or detector spectral-response based standards cannot be applied for accurate UV LED measurements. Since the CIE standardized rectangular-shape spectral response function for UV measurements cannot be realized

Diffraction limited focusing and directing of gap plasmons by a metal-dielectric-metal lens

August 24, 2015
Author(s)
Brian S. Dennis, David Czaplewski, Michael Haftel, Daniel Lopez, Girsh Blumberg, Vladimir Aksyuk
Passive optical elements can play key roles in photonic applications such as plasmonic integrated circuits. Here we experimentally demonstrate passive gap-plasmon focusing and directing in two-dimensions. This is accomplished using a high numerical

On-Chip Silicon Waveguide Bragg Grating Photonic Temperature Sensor

August 4, 2015
Author(s)
Nikolai Klimov, Sunil Mittal, Zeeshan Ahmed, Michaela Berger
Resistance thermometry is a time-tested method for temperature measurements. Fundamental limits to resistance-based approaches, spurred our interest in developing photonic temperature sensors as a viable alternative. In this study we demonstrate that our

Compact X-ray and Extreme-Ultraviolet Light Sources

July 10, 2015
Author(s)
Lahsen Assoufid, Uwe Arp, Patrick Naulleau, Sandra Biedron , William Graves
Bringing the brightness and power of vast synchrotron and free-electron laser sources to the scale of the lab and clinic marks an important next frontier—and could transform the landscape of X-ray science and technology.

Development of traceable measurement of the diffuse optical properties of solid reference standards for biomedical optics at the National Institute of Standards and Technology

July 1, 2015
Author(s)
David Allen, Paul Lemaillet, Jean-Pierre Bouchard
The development of a national reference instrument dedicated to the measurement of the scattering and absorption properties of solid tissue-mimicking phantoms used as reference standards is presented. The optical properties of the phantoms are measured

Application of the Hartmann-Tran profile to analysis of H2O spectra

June 9, 2015
Author(s)
D Lisak, A. Cygan, D Bermejo, J L. Domenech, Joseph T. Hodges, Ha Tran
The Hartmann-Tran profile (HTP), which has been recently recommended as a new standard in spectroscopic databases, is used to analyze spectra of several lines of H$_2$O diluted in N$_2$, SF$_6$, and in pure H$_2$O. This profile accounts for various

An Experimental Approach to A Definition of The Mesopic Adaptation Field

May 14, 2015
Author(s)
Tatsukiyo (. Uchida, Yoshihiro Ohno
The CIE 191 mesopic luminous efficiency function depends on the luminance of visual adaptation field, therefore, it must be measured to implement the mesopic photometry method. However, the size and shape of the adaptation field are not defined in CIE 191

Quantitative scheme for full-field polarization rotating fluorescence microscopy (PROM) using a liquid crystal variable retarder

May 14, 2015
Author(s)
John F. Lesoine, Ji Y. Lee, Hyeong G. Kang, Matthew L. Clarke, Robert C. Chang, Ralph Nossal, Jeeseong C. Hwang
We introduce real-time, full-field, polarization rotating fluorescence microscopy (PROM) to monitor the absorption dipole orientations of fluorescent molecules. A quarter-wave plate, in combination with a liquid crystal variable retarder (LCVR), provides a

The Cosmic Infrared Background Experiment (CIBER): The Low Resolution Spectrometer

May 14, 2015
Author(s)
K. Tsumura, T. Aria, J. Battle, J. Bock, Steven Brown, A. Cooray, V. Hristov, B. Keating, M. G. Kim, D. H. Lee, L. R. Levenson, Keith R. Lykke, P. Mason, T. Matsumoto, S. Matsuura, K. Murata, U. W. Nam, T. Renbarger, Allan W. Smith, I. Sullivan, K. Suzuki, T. Wada, M. Zemcov, U. W. Nam, B. Shultz, I. Sullivan, P. M. Korngut
Absolute spectrophotometric measurements of diffuse radiation at 1−2 μm are crucial to our understanding of the radiative content of the Universe from nucleosynthesis since the epoch of reionization, the composition and structure of the Zodiacal dust cloud

Towards a FPGA-controlled deep phase modulation interferometer

May 11, 2015
Author(s)
Marcelo Teran, Victor Martin, Lluis Gesa, Ignacio Mateos, Ferran Gibert, Nico Karnesis, Juan Ramos Castro, Thomas Schwarze, Oliver Gerberding, Gerhard Heinzel, Felipe Guzman, Miquel Nofrarias
Deep phase modulation interferometry was proposed as a method to enhance homodyne interferometers to work over many fringes. In this scheme, a sinusoidal phase modulation is applied in one arm while the demodulation takes place as a post-processing step

System Vicarious Calibration for Ocean Color Climate Change Applications: Requirements for In Situ Data

March 15, 2015
Author(s)
Giuseppe Zibordi, Frederic Melin, Kenneth Voss, B. Carol Johnson, Bryan Franz, Ewa Kwiatkowska, J. P. Huot, Menghua Wang, David Antoine
System Vicarious Calibration (SVC) ensures a relative radiometric calibration to satellite ocean color sensors that minimizes uncertainties in the water-leaving radiance Lw derived from the top of atmosphere radiance LT. This is achieved through the

Infrared Optical Properties of Materials

February 24, 2015
Author(s)
Simon G. Kaplan, Leonard Hanssen, Raju V. Datla
This document describes the Fourier Transform Infrared Spectrophotometry (FTIS) Facility at the Sensor Science Division (SSD) of the National Institute of Standards and Technology (NIST) to provide the infrared optical properties of materials (IROPM)

Effects of wafer noise on the detection of 20 nm defects using optical volumetric inspection

February 11, 2015
Author(s)
Bryan Barnes, Francois R. Goasmat, Martin Sohn, Hui Zhou, Andras Vladar, Richard Silver
Patterning imperfections in semiconductor device fabrication may either be noncritical [e.g., line edge roughness (LER)] or critical, such as defects that impact manufacturing yield. As the sizes of the pitches and linewidths decrease in lithography

Thermo-elastic induced phase noise in the LISA Pathfinder spacecraft

January 25, 2015
Author(s)
Ferran Gibert, Miquel Nofrarias, Nico Karnesis, Lluis Gesa, Victor Martin, Ignacio Mateos, Alberto Lobo, Reinhold Flatscher, Domenico Gerardi, Johannes Burkhardt, Ruediger Gerndt, David I. Robertson, Henry Ward, Paul McNamara, Felipe Guzman, Martin Hewitson, Ingo Diepholz, Jens Reiche, Gerhard Heinzel, Karsten Danzmann
During the on-station thermal test campaign of the LISA Pathfinder, the diagnostics subsystem was tested in nearly space conditions for the first time after integration in the satellite. The results showed the compliance of the temperature measurement

Reconstruction of mode structure of faint sources and its applications

December 19, 2014
Author(s)
Sergey Polyakov, Alan Migdall, Elizabeth A. Goldschmidt, Giorgio Brida, Stefan Kueck, Fabrizio Piacentini, Ivo P. Degiovanni, I. Ruo Berchera, Marco Genovese
We build upon our newly developed mode reconstruction technique that takes advantage of higher-order photon number statistics and propose new experiments.

Experimental Bounds on Classical Random Field Theories

December 10, 2014
Author(s)
Joffrey K. Peters, Sergey Polyakov, Jingyun Fan, Alan Migdall
Alternative theories to quantum mechanics motivate important fundamental tests of our understanding and description of the smallest physical systems. Here we place experimental limits on those classical field theories which result in power-dependent
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