A5085947477- Advanced Frequency and Time Standards
- Atomic and Subatomic Physics Research
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Fiber Laser Technologies
- Scientific Measurement and Uncertainty Evaluation
- Network Time Synchronization Technologies
- Distributed systems and fault tolerance
- Cardiovascular Syncope and Autonomic Disorders
- Spectroscopy and Laser Applications
- Advanced Fiber Optic Sensors
- Mechanical and Optical Resonators
- Smart Grid Security and Resilience
- Solid State Laser Technologies
- Quantum optics and atomic interactions
- Time Series Analysis and Forecasting
- Complex Systems and Time Series Analysis
- Advanced Measurement and Metrology Techniques
- Geophysics and Sensor Technology
- Spectroscopy Techniques in Biomedical and Chemical Research
- Semiconductor Lasers and Optical Devices
- Analytical Chemistry and Sensors
- Spectroscopy and Quantum Chemical Studies
- Seismic Waves and Analysis
- Hemodynamic Monitoring and Therapy
CSIR National Physical Laboratory of India
2019-2025
Academy of Scientific and Innovative Research
2022-2025
Council of Scientific and Industrial Research
2020-2024
National Physical Laboratory
2022
Weatherford College
2022
RIKEN
2015-2016
Quantum Chemistry Research Institute
2015
RIKEN Center for Advanced Photonics
2015
Japan Science and Technology Agency
2015
RIKEN Advanced Science Institute
2012
Sub-Doppler laser-cooled cesium-133 atoms are utilized as quantum sensors to achieve precise mapping of magnetic fields across a region in ultra-high vacuum (UHV), with spatial resolution 1 cm and sensitivity approximately 550 pT/√Hz, enabling accurate measurements within the nanotesla [nT] range. The cold used for field this paper key component cesium fountain frequency standard at CSIR-NPL, which contributes both timekeeping sensing. results show fluctuations nT cm. uncertainty these is...
The objective of the Study is to find out status cocurricular activities government primary schools Khawai District Tripura. Descriptive Survey Method was adopted for this study and 90 Government Primary Tripura (age group Children 6-14 years) were used as sample where self-developed Questionnaire, Interview Observation tools. data analyzed in percentage Bar Diagram. findings 80.1% (72) well organized annual co-curricular participation programme students 19.9% (18) organize just name. It can...
Modern atomic clocks based on the interrogation of an transitions in optical regions require multiple lasers at different wavelength for producing ions, trapping and laser cooling neutral atoms or ions. In order to achieve highest efficiency any other transition, frequencies each involved need be stabilized by mitigating its drifts fluctuations arise due ambient temperature variation kind perturbations. The present article describes simultaneous frequency stabilization number lasers,...
<title>Abstract</title> Saturated Absorption Spectroscopy (SAS) is a technique commonly used for recording Doppler broadening free absorption spectra of atomic vapours and also to estimate the natural linewidth transitions. However, in conventional SAS two counter-propagating laser beams are as pump probe linewidths show strong dependences with power following saturation theory. The present work demonstrates unique Cross-Beam spectroscopy saturated near their by deploying orthogonal...
CSIR-National Physical Laboratory (CSIR-NPL), New Delhi is the custodian of primary time scale generating Indian Standard Time (IST). In present paper we report major reduction uncertainty Primary Scale from 20 ns to 7.2 and finally 2.8 ns. We also discuss current dissemination methods being employed tasks undertaken for upgradation strengthening serve pan India in a better way at par with international level.
We report recent progress of optical lattice clocks with strontium, ytterbium and mercury atoms an emphasis on their synchronous frequency comparison inside a laboratory inter-laboratories connected by phase-stabilized fiber link.
Comparison of ultra-stable frequency references located in geographically distributed areas require a transfer technique, which offers stability 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">−17</sup> at 1 s over tens kilometer. Such remote will allow comparing the optical same or different atomic species (through comb bridge) for test relativistic geodesy [1] time variation fundamental constants [2], and contribute towards database ratio...
<title>Abstract</title> The SI unit of pressure, i.e. Pascal is realized with mechanical devices such as ultrasonic interferometer manometers and pressure balances for the range 1 Pa to 100 kPa. Recently, optical are being used realize Pascal. Such a realization mercury-free environmentally friendly does not depend on any motions in piston gauges based physical constants. It consists an Fabry-Perot cavity refractometer measurement resonant frequency using lasers. In this paper, we report...
<title>Abstract</title> National time dissemination using terrestrial ethernet and optical fiber cables is an alternative to satellite-based systems provides redundancy reliable services for critical infrastructure in the country. Precision protocol based on IEEE 1588 standards such fibers can provide sub-microsecond synchronization between a provider client. The method employs hardware stamping, dedicated traffic-free links, PTP-aware network elements. We present proof of concept experiment...