Optical frequency synthesis and comparison with uncertainty at the 10(-19) level.
نویسندگان
چکیده
A femtosecond laser-based optical frequency synthesizer is referenced to an optical standard, and we use it to demonstrate the generation and control of the frequency of electromagnetic fields over 100 terahertz of bandwidth with fractional uncertainties approaching 1 part in 10(19). The reproducibility of this performance is verified by comparison of different types of femtosecond laser-based frequency synthesizers from three laboratories.
منابع مشابه
P3: Investigation of the Relationship between Uncertainty in the Disease with the Frequency of Hospitalization in Patients with Multiple Sclerosis who Referred to the Zanjan MS Society Sclerosis
Multiple sclerosis (MS) affects all aspects of a person's life. Considering the unpredictable progress of MS, Patients suffer from uncertainty about their future health and wellbeing which causes psychological distress and social degradation and consequently it affects the development of the disease. This study aims to investigate the relationship between uncertainty in the disease with the fre...
متن کاملError Analysis, Design and Modeling of an Improved Heterodyne Nano-Displacement Interferometer
A new heterodyne nano-displacement with error reduction is presented. The main errors affecting the displacement accuracy of the nano-displacement measurement system including intermodulation distortion error, cross-talk error, cross-polarization error and phase detection error are calculated. In the designed system, a He-Ne laser having three-longitudinal-mode is considered as the stabiliz...
متن کاملIncreasing the Accuracy of Blood Hematocrit Measurement by Triplicate Wavelength Photoplethysmography Method
Background and objectives: The importance of continuous monitoring and rapid and accurate informing of changes in blood components (e.g., percentage of hematocrit [HCT]), especially in acute conditions, has motivated researchers to use non-invasive measurement methods. Therefore, this study aimed to evaluate the association between blood HCT and photoplethysmographic signal and the possibility ...
متن کاملInterval Type-II Fuzzy H∞ Frequency Control for an Island Microgrid
Frequency control is one of the key parts for the arrangement of the performance of a microgrid (MG) system. Theoretically, model-based controllers may be the ideal control mechanisms; however, they are highly sensitive to model uncertainties and have difficulty with preserving robustness. The presence of serious disturbances, the increasing number of MG, varying voltage supplies of MGs, and bo...
متن کاملFuzzy Network Analysis for Projects with High Level of Risks – Uncertainty in Time and Structure
In order to have better insight of project characteristics, different kinds of fuzzy analysis for project networks have been recently proposed, most of which consider activities duration as the main and only source of imprecision and vagueness, but as it is usually experienced in real projects, the structure of the network is also subject to changes. In this paper we consider three types of i...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Science
دوره 303 5665 شماره
صفحات -
تاریخ انتشار 2004