A5019732134- Atomic and Subatomic Physics Research
- Quantum optics and atomic interactions
- Cold Atom Physics and Bose-Einstein Condensates
- Scientific Measurement and Uncertainty Evaluation
- Advanced Frequency and Time Standards
- Advanced Fiber Laser Technologies
- Spectroscopy and Laser Applications
- Advanced Measurement and Metrology Techniques
- Laser Design and Applications
- Nuclear physics research studies
- Calibration and Measurement Techniques
- Force Microscopy Techniques and Applications
- Advanced Electrical Measurement Techniques
- Astronomical Observations and Instrumentation
- Quantum Chromodynamics and Particle Interactions
- Surface Roughness and Optical Measurements
- Nonlinear Dynamics and Pattern Formation
- Laser Material Processing Techniques
- Advanced Sensor Technologies Research
- Magnetic confinement fusion research
- Laser-Matter Interactions and Applications
Tübitak National Metrology Institute
2002-2024
Scientific and Technological Research Council of Turkey
2004-2013
Istanbul Technical University
2012
Six European National Measurement Institutes (NMIs) have joined forces within the Metrology Research Programme funded project NANOTRACE to develop next generation of optical interferometers having a target uncertainty 10 pm. These are needed for NMIs provide improved traceable dimensional metrology that can be disseminated wider nanotechnology community, thereby supporting growth in nanotechnology. Several approaches were followed order interferometers. This paper briefly describes different...
A differential Fabry–Perot interferometer (DFPI) was applied for the detection of ultra-small angles in level nanoradian (nrad) precision. During application, down to 1 nrad angular steps were generated using available high precision small angle generator (HPSAG) and these detected frequency stabilised lasers as an alternative outperforming method conventional interferometers. The use DFPI provided displacement measurements (further displacements through optical configuration) with picometre...
Lasers from nine national metrology institutes (NMIs) were compared as part of the CCL-K11 ongoing key comparison, initiated by 13th meeting Comité Consultative des Longeurs (CCL) in 2007. The absolute frequency f component R(127) 11–5 transition molecular iodine was measured for these lasers following technical protocol CCL-K11. results measurements are compiled present report.
We have detected and analyzed narrow, high contrast coherent population trapping resonances, which appear in transmission of the probe monochromatic light beam under action counterpropagating two-frequency laser radiation, on example nonclosed three level Λ-system formed by spectral components Doppler broadened D2 line cesium atoms (in cell with rarefied Cs vapor). These nontrivial resonances are determined directly trapped atomic definite lower may be used frequency standards, sensitive...
The absolute frequency of the f-component for UME laser was measured with BIPM femtosecond comb to be (473 612 353 602.0 ± 1.1) kHz during 3 March 8 March, 2003 and 600.6 from 20 June 25 June, 2005. After appropriate correction power modulation shifts a subkilohertz agreement between two measurements found. Moreover, relative stability different UME–BIPM pairs is investigated using standard heterodyne techniques Allan variance statistics.
We have detected and analysed narrow high-contrast coherent population trapping (CPT) resonances, which are induced in absorption of a weak monochromatic probe light beam by counterpropagating two-frequency pump radiation cell with rarefied caesium vapour. The experimental investigations been performed the example nonclosed three level Λ-systems formed spectral components D2 line atoms. applied method allows one to analyse features CPT phenomenon directly at given low long-lived selected...
Experimental research is carried out into the features of sub-Doppler absorption resonances caused by optical pumping and transit relaxation Cs atoms in a thin 120-μm cell (with rarefied vapor) for ring-shaped laser beams. Such are analyzed both transmission single running beam at interaction counterpropagating beams different degrees their spatial overlapping cell.
We have detected and analyzed narrow, high contrast coherent population trapping (CPT) resonances, which appear in transmission of the probe monochromatic light beam under action counter propagating two frequency laser radiation, on example nonclosed three level A-system formed by spectral components Doppler broadened D <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> line cesium atoms. Given resonances may be used atomic standards,...
Vapor cell atomic clocks are an interesting technology because they combine compactness, low power consumption and excellent relative frequency stability. Recently, due to better performing laser sources innovative techniques prepare detect the atoms, several cell-based prototypes exhibiting unprecedented stability have been developed. These allow a reduction in transfer of noise improvement signal-to-noise ratio subsequently clock's The project IND55 Mclocks funded by European Metrological...
In this work, the novel angle measurement method that make use of Differential Fabry — Perot Interferometer (DFPI) and High Precision Small Angle Generator (HPSAG) will be introduced. The DFPI using frequency stabilized lasers beat techniques was applied to detection ultra-small angles in level sub-nanoradian precision. During application down 1 nrad angular steps within range 0.5 arcsec (2500 nrad) were generated HPSAG these detected by which could measure displacements with picometer...
We have detected and analysed interesting features of sub-Doppler resonances, which are induced in absorption the weak monochromatic probe light beam (with scanned frequency) by counterpropagating two-frequency pumping radiation implementing phenomenon coherent population trapping (CPT) on resonant Λ-systems atomic levels. Our experimental investigations been carried out example spectral components Doppler broadened D <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...
We have detected and analysed narrow high-contrast coherent population trapping (CPT) resonances, which are induced in absorption of the weak probe light beam by counterpropagating two-frequency pumping radiation. Our experimental investigations been carried out on example nonclosed three level Lambda systems formed spectral components Doppler broadened D2 line cesium atoms. established that CPT resonances transmission (in vapor), at definite conditions, may not only more contrast but also...
An international comparison of the UME and BIPM He-Ne/I <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> lasers was carried out. The frequency difference between determined by matrix method. Furthermore, absolute f-component for laser measured with femtosecond comb to be (473 612 353 602.0 plusmn 2.2) kHz
This Bilateral Comparison of gauge blocks calibration by interferometry was held in 2017. The measured the comparison, are short (2 mm, 3 4 5 6 10 50 80 mm and 100 mm) long (200 500 600 mm). were inspected illustrated prior after comparison according to stability. degree equivalence is calculated for each results show that there a within 1. latest which UME had participated, EURAMET.L-K1.2011, gage interferometry. Since GULFMET new RMO, this can provide link EURAMET key comparison. KEY WORDS...