Commercial quantum sensors using atom interferometry and laser sources for precision metrology

2021 ◽  
Author(s):  
Joseph Thom ◽  
Craig Picken ◽  
Jonathan Malcolm ◽  
Andrew Kelly ◽  
Xiaxi Cheng ◽  
...  
Keyword(s):  
Atom Interferometry ◽  
Laser Sources ◽  
Precision Metrology

Ongoing trends in precision metrology, particularly in nanopositioning and nanomeasuring technology

2015 ◽  
Vol 82 (7-8) ◽  
Author(s):  
Eberhard Manske ◽  
Roland Füßl ◽  
Rostyslav Mastylo ◽  
Nataliya Vorbringer-Dorozhovets ◽  
Oliver Birli ◽  
...  
Keyword(s):  
Optical Sensors ◽  
Single Point ◽  
Frequency Stability ◽  
Intelligent Algorithms ◽  
Aspect Ratios ◽  
Nano Structures ◽  
Parallel Data ◽  
Laser Sources ◽  
Precision Metrology ◽  
Measurement Strategies

AbstractContinuing engineering progress in precision fabrication technologies, especially in the diversified micro- and nanotechnology, stimulates the advance in precision metrology, particularly in nanopositioning and nanomeasuring technology. Structures reach atomic dimensions, and becoming more and more complex. Consequently, measurements are required – to an increasing extend – of larger surface regions and sidewalls with higher aspect ratios as well as fully 3D micro- and nano-structures.Therefore, the resolution of nanomeasuring machines approaches the picometre level and the frequency stability of the laser sources the range of 10–10 to provide multiscale accuracy. Area-measuring optical sensors provide vast amount of data (> 5 Tbyte). Lateral highly resolved measurements are only possible by tip-based AFM single point probes but are extremely time consuming. Here, adaptive intelligent algorithms for optimum hierarchical measurement strategies are necessary. Multisenor instrumentation and multiparameter characterization provide additional challenges also in profoundly parallel data processing.

Prospects of development of the reference base of the Russian Federation in the field of length measurements

2020 ◽  
pp. 3-5
Author(s):  
Y. G. Zakharenko ◽  
N. A. Kononova ◽  
V. L. Fedorin ◽  
Z. V. Fomkina ◽  
K. V. Chekirda
Keyword(s):  
High Precision ◽  
Russian Federation ◽  
Reference Base ◽  
Length Measurements ◽  
Laser Sources ◽  
The Russian Federation ◽  
Unit Of Length ◽  
Further Development ◽  
532 Nm

The results of the work to create a complex of high-precision hardware for the unit of length reproduction and transferring carried out at “D. I. Mendeleyev Institute for Metrology (VNIIM)” are represented. This complex will serve as the basis for the further development of the reference base of the Russian Federation in the field of length measurements and will allow reproduction of the unit of length at two wavelengths of 633 nm and 532 nm, as well as measurements of the wavelength of laser sources in vacuum in the range from 500 to 1050 nm.

Non-Plasmonic SERS with Silicon: Is It Really Safe? New Insights into Opto-Thermics of Core/Shell Microbeads

2018 ◽  
Author(s):  
Nicolò Bontempi ◽  
Irene Vassalini ◽  
Stefano Danesi ◽  
Matteo Ferroni ◽  
Paolo Colombi ◽  
...  
Keyword(s):  
Critical Role ◽  
Raman Laser ◽  
Core Shell ◽  
Thermal Coupling ◽  
Melting Points ◽  
Experimental Proof ◽  
Weakly Coupled ◽  
Light Management ◽  
Laser Sources ◽  
First Time

<p>Here we investigate for the first time the opto-thermal behavior of SiO<sub>2</sub>/Si core/shell microbeads (Si-rex) irradiated with three common Raman laser sources (lambda=532, 633, 785 nm) under real working conditions. We obtained an experimental proof of the critical role played by bead size and aggregation in heat and light management, demonstrating that in the case of strong opto-thermal coupling the temperature can exceed that of the melting points of both core and shell components. In addition, we also show that weakly coupled beads can be utilized as stable substrates for plasmon-free SERS experiments.</p>

Laser sources in medicine

1967 ◽  
Vol 13 (12) ◽  
pp. 458
Author(s):  
T. Powell
Keyword(s):  
Laser Sources

Superfluorescent laser sources based on single-wall carbon nanotube films (Conference Presentation)

2017 ◽  
Author(s):  
Zhongqu Long ◽  
Yongrui Wang ◽  
Kankan Cong ◽  
G. Timothy Noe II ◽  
Junichiro Kono ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Single Wall Carbon Nanotube ◽  
Single Wall Carbon ◽  
Laser Sources ◽  
Nanotube Films

scholarly journals Ultracold atom interferometry in space

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Maike D. Lachmann ◽  
Holger Ahlers ◽  
Dennis Becker ◽  
Aline N. Dinkelaker ◽  
Jens Grosse ◽  
...  
Keyword(s):  
Spatial Coherence ◽  
Free Fall ◽  
Atom Interferometry ◽  
Matter Wave ◽  
Sounding Rocket ◽  
Ultracold Atom ◽  
Fundamental Physics ◽  
Light Pulses ◽  
Bose Einstein ◽  
Promising Source

AbstractBose-Einstein condensates (BECs) in free fall constitute a promising source for space-borne interferometry. Indeed, BECs enjoy a slowly expanding wave function, display a large spatial coherence and can be engineered and probed by optical techniques. Here we explore matter-wave fringes of multiple spinor components of a BEC released in free fall employing light-pulses to drive Bragg processes and induce phase imprinting on a sounding rocket. The prevailing microgravity played a crucial role in the observation of these interferences which not only reveal the spatial coherence of the condensates but also allow us to measure differential forces. Our work marks the beginning of matter-wave interferometry in space with future applications in fundamental physics, navigation and earth observation.

Different modulation schemes for direct and external modulators based on various laser sources

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Hazem M. El-Hageen ◽  
P.G. Kuppusamy ◽  
Aadel M. Alatwi ◽  
M. Sivaram ◽  
Z. Ahamed Yasar ◽  
...  
Keyword(s):  
Rate Equation ◽  
Simulation Software ◽  
Optical Systems ◽  
Laser Source ◽  
Optical Link ◽  
Input And Output ◽  
Modulation Techniques ◽  
Different Types ◽  
Laser Sources ◽  
Modulation Schemes

AbstractDifferent types of laser source modulation techniques have been used in various applications depending on the objective. As optical systems extract the laws and the best solutions from experiments and simulations, the present study uses simulation software with different modulation types so the output signals can be compared. The modulators used are Mach-Zehnder, which is an external modulator, and electro-absorption modulator and laser rate equation modulator, which are direct modulators. All these types have an optical link multimode (MM) fiber with a photodiode in the receiver end that can be modeled. The input and output signals are analyzed using different types of modulations.

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