Results 1 to 10 of about 125,078 (291)

Allan deviation tells the binding properties in single-molecule sensing with whispering-gallery-mode optical microcavities [PDF]

open access: yesPhysical Review Research, 2021
We propose a scheme of exploring the kinetic properties of the receptor-ligand binding process by means of the frequency stability measurement of a whispering-gallery-mode optical microcavity.
Deshui Yu, Frank Vollmer
doaj   +3 more sources

Coherent population trapping with a controlled dissipation: applications in optical metrology

open access: yesNew Journal of Physics, 2018
We analyze the properties of a pulsed coherent population trapping protocol that uses a controlled decay from the excited state in a Λ-level scheme. We study this problem analytically and numerically and find regimes where narrow transmission, absorption,
L Nicolas   +6 more
doaj   +4 more sources

Stabilizing diode laser to 1 Hz-level Allan deviation with atomic spectroscopy for Rb four-level active optical frequency standard [PDF]

open access: yesApplied Physics B: Lasers and Optics, 2019
AbstractWe achieve a compact ultra-stable 420 nm blue diode laser system by immediately stabilizing the laser on the hyperfine transition line of Rb atom. The Allan deviation of the residual error signal reaches 1 Hz-level Allan deviation within 1 s averaging time, and the fractional frequency Allan deviation is$$1.4\times 10^{-15}/\sqrt{\tau }$$1.4×10-
Shengnan Zhang   +2 more
exaly   +2 more sources

Analytic Method for Estimating Aircraft Fix Displacement From Gyroscope’s Allan-Deviation Parameters [PDF]

open access: yesIEEE Sensors Journal, 2022
The noise and drift requirements for a navigation-grade gyroscope are widely known, yet there is no simple analytic model of how the noise and drift of a gyroscope influence the fix displacement error (FDE) of an inertial navigation system (INS). This work derives simple analytical expressions for the cross-track and along-track errors of an aircraft ...
Jonathan M. Wheeler   +3 more
openaire   +2 more sources

SEMICONDUCTOR FREQUENCY STANDARD BASED ON P(16) SPECTRAL LINE OF ACETYLENE ISOTOPE WITH TEMPERATURE STABILIZATION BY PHASE MODULATION [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2018
This paper reviews the method of semiconductor laser diode frequency stabilization by phase modulation. Also parameters are identified that affect the quality of stabilization and the estimation of Allan deviation is obtained.
A. B. Danichev   +2 more
doaj   +1 more source

A Method for Autonomous Generation of High-Precision Time Scales for Navigation Constellations

open access: yesSensors, 2023
The time maintenance accuracy of the navigation constellation determines the user positioning and timing performance. Especially in autonomous operation scenarios, the performance of navigation constellation maintenance time directly affects the duration
Shitao Yang   +7 more
doaj   +1 more source

Evaluation of BDS-2 and BDS-3 Satellite Atomic Clock Products and Their Effects on Positioning

open access: yesRemote Sensing, 2021
The BeiDou Navigation Satellite System (BDS) has completed third phase construction and currently provides global services, with a mixed constellation of BDS-2 and BDS-3. The newly launched BDS-3 satellites are equipped with rubidium and passive hydrogen
Shengfeng Gu   +5 more
doaj   +1 more source

The Effect of Spectral Resolution on the Quantification of OP-FTIR Spectroscopy

open access: yesPhotonics, 2023
Open-path Fourier Transform infrared spectroscopy (OP-FTIR) is widely used in polluted gas monitoring. The spectral resolution, as a key parameter of FTIR detection technology, affects the quantitative analysis of gas concentration.
Yusheng Qin   +4 more
doaj   +1 more source

Closed-Loop Control and Output Stability Analysis of a Micromechanical Resonant Accelerometer

open access: yesMicromachines, 2022
In this study, a dynamic equation for a micromechanical resonant accelerometer based on electrostatic stiffness is analyzed, and the parameters influencing sensitivity are obtained.
Heng Liu, Yu Zhang, Jiale Wu
doaj   +1 more source

Allan Deviation of Atomic Clock Frequency Corrections: A New Diagnostic Tool for Characterizing Clock Disturbances [PDF]

open access: yesIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2021
As atomic clocks and frequency standards are increasingly operated in situations where they are exposed to environmental disturbances, it becomes more necessary to understand how variations of each clock component impact the clock output, in particular the local oscillator (LO).
Daphna G. Enzer   +2 more
openaire   +2 more sources

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