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Raabe N.,Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy | Mero M.,Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy | Song Y.,Tianjin University | Haensel W.,Menlo Systems, Inc. | And 4 more authors.
2016 Conference on Lasers and Electro-Optics, CLEO 2016 | Year: 2016

A method for analyzing the statistical nature of laser noise is demonstrated. By application to CEP noise characteristics, the method is shown to enable discriminating between deterministic technical and stochastic quantum noise contributions. © 2016 OSA.


Twagirayezu S.,Brookhaven National Laboratory | Cich M.J.,State University of New York at Stony Brook | Sears T.J.,Brookhaven National Laboratory | Sears T.J.,State University of New York at Stony Brook | And 3 more authors.
Journal of Molecular Spectroscopy | Year: 2015

Doppler-free transition frequencies for v4- and v5-excited hot bands have been measured in the v1 +v3 band region of the spectrum of acetylene using saturation dip spectroscopy with an extended cavity diode laser referenced to a frequency comb. The frequency accuracy of the measured transitions, as judged from line shape model fits and comparison to known frequencies in the v1 +v3 band itself, is between 3 and 22kHz. This is some three orders of magnitude improvement on the accuracy and precision of previous line position estimates that were derived from the analysis of high-resolution Fourier transform infrared absorption spectra. Comparison to transition frequencies computed from constants derived from published Fourier transform infrared spectra shows that some upper rotational energy levels suffer specific perturbations causing energy level shifts of up to several hundred MHz. These perturbations are due to energy levels of the same rotational quantum number derived from nearby vibrational levels that become degenerate at specific energies. Future identification of the perturbing levels will provide accurate relative energies of excited vibrational levels of acetylene in the 7100-7600cm-1 energy region. © 2015 Elsevier Inc.


Peters O.,University of Marburg | Schwerdtfeger M.,University of Marburg | Wietzke S.,ContiTech AG | Sostmann S.,ContiTech AG | And 6 more authors.
Polymer Testing | Year: 2013

The interest in new test methods for rubber production has been growing rapidly over the past years. Recent developments in production planning aim to minimize storage times, and hence limit the time available for process control between production steps. New additives such as silica and carbon nanotubes allow for significant improvements in the material quality. Both developments demand new approaches to control the production process where established methods do not work satisfactorily. In this study, we have investigated the capability of terahertz time-domain spectroscopy as a new tool for rubber production testing. Offline measurements of different material families show a strong contrast in the terahertz refractive index. Inline measurements during elastomer extrusion allow for monitoring production processes and the duration of purposely induced material changes in the extruder. This technique helps to improve the quality of the materials and to minimize waste. © 2013 Elsevier Ltd. All rights reserved.


Chitta S.,Menlo Systems, Inc.
Studies in Computational Intelligence | Year: 2016

MoveIt! is state of the art software formobile manipulation, incorporating the latest advances in motion planning, manipulation, 3D perception, kinematics, control and navigation. It provides an easy-to-use platform for developing advanced robotics applications, evaluating new robot designs and building integrated robotics products for industrial, commercial, R&D and other domains. MoveIt! is the most widely used open-source software for manipulation and has been used on over 65 different robots. This tutorial is intended for both new and advanced users: it will teach new users how to integrate MoveIt! with their robots while advanced users will also be able to get information on features that they may not be familiar with. © Springer International Publishing Switzerland 2016.


Wilk R.,Menlo Systems, Inc.
Bulletin of the Polish Academy of Sciences: Technical Sciences | Year: 2011

In this paper we present an all-fiber THz spectrometer based on novel OSCAT technique. We investigate its application to non-destructive testing in the polymer industry. A set of polypropylene samples with different contents of TiO2 as a filler is examined using THz waves.


Cole D.C.,U.S. National Institute of Standards and Technology | Cole D.C.,University of Colorado at Boulder | Beha K.M.,U.S. National Institute of Standards and Technology | Beha K.M.,Menlo Systems, Inc. | And 2 more authors.
Journal of Physics: Conference Series | Year: 2016

We demonstrate a system based on telecom components for the generation of a coherent octave-spanning supercontinuum from a continuous-wave laser. The system utilizes direct multiplication of a 10 GHz signal derived from a commercial synthesizer to carve pulses from the laser, which are then iteratively chirped and compressed in two stages. After reducing the repetition rate of the resulting pulse train to 2.5 GHz using selective transmission through an electro-optic gate, propagation through highly-nonlinear fiber generates an octave-spanning supercontinuum spectrum. We discuss the impact of the noise of the modulation frequency on the coherence of the supercontinuum and discuss its mitigation. Close agreement between experiment and theory is shown throughout, and we use our ability to precisely model the experiment to propose an extension of the system to 20 GHz repetition rate.


Grant
Agency: Department of Energy | Branch: | Program: STTR | Phase: Phase I | Award Amount: 99.44K | Year: 2010

Long term stable and cost effective distribution of precision timing signals with better than 100-fs precision has been a challenging task for many years in fundamental and applied science. With the dawn of fourth generation light sources, such as seeded X-ray Free Electron Lasers (X-FEL), which are currently in design and construction in the US and around the world femtosecond timing distribution has become an urgent need. Next generation light sources will generate, and in fact are already generating at FLASH, DESY, 10-fs EUV and later hard X-ray pulses that can be used to study a variety of scientific topics ranging from condensed matter physics, material sciences, and femtochemistry to studying the structure and function of large biomolecules, one of the holy grails in biophysics. It is obvious that such a facility will operate using the most advanced ultrashort pulse laser and accelerator technology available. Maximum performance of the facility can only be achieved if both the optical and radio-frequency driven sub-components are synchronized to each other with at first a few tens of femtosecond, but ultimately sub-femtosecond precision over extended durations (>24 hours). Commercial Applications and Other Benefits: The objective of the proposed work is to study the feasibility and identify the best approach towards developing a modular femtosecond timing distribution system for next generation accelerators and light sources. Finally, the necessary technology will be transferred from a university laboratory to a small business to make it available for the forthcoming DOE facilities. Key focus of such a system is long-term performance, i.e. timing stability must be maintained over at least 24 hours. The resulting timing distribution system must be scalable in terms of its precision and length, i.e. from the tens of femtoseconds needed today to sub-femtosecond precision over kilometers if distance in the future, cost efficient and robust.


Grant
Agency: Department of Energy | Branch: | Program: STTR | Phase: Phase II | Award Amount: 747.05K | Year: 2011

Long term stable and cost effective distribution of precision timing signals with better than 100-fs precision has been a challenging task for many years in fundamental and applied science. With the dawn of fourth generation light sources, such as seeded X-ray Free Electron Lasers (X-FEL), which are currently in design and construction in the US and around the world femtosecond timing distribution has become an urgent need. Next generation light sources will generate, and in fact are already generating at FLASH, DESY, 10-fs EUV and later hard X-ray pulses that can be used to study a variety of scientific topics ranging from condensed matter physics, material sciences, and femtochemistry to studying the structure and function of large biomolecules, one of the holy grails in biophysics. It is obvious that such a facility will operate using the most advanced ultrashort pulse laser and accelerator technology available. Maximum performance of the facility can only be achieved if both the optical and radio-frequency driven sub-components are synchronized to each other with at first a few tens of femtosecond, but ultimately sub-femtosecond precision over extended durations ( & gt;24 hours). Commercial Applications and Other Benefits: The objective of the proposed work is to study the feasibility and identify the best approach towards developing a modular femtosecond timing distribution system for next generation accelerators and light sources. Finally, the necessary technology will be transferred from a university laboratory to a small business to make it available for the forthcoming DOE facilities. Key focus of such a system is long-term performance, i.e. timing stability must be maintained over at least 24 hours. The resulting timing distribution system must be scalable in terms of its precision and length, i.e. from the tens of femtoseconds needed today to sub-femtosecond precision over kilometers if distance in the future, cost efficient and robust.


Precision in Photonics. Together we shape light ...


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