We characterize the instability of an rf clock signal caused by free-space transmission of a frequency comb (FC) under typical laboratory conditions. The phase-noise spectra show the involvement of multiple random processes. For a 10 m transmission, the rms timing jitter integrated over 1-10(5) Hz is 95 fs, and the root Allan variance over 1 s is 4x10(-13). The measured Allan variance has a tau(-1) behavior and an excellent agreement with the phase noise measurement. These results indicate the feasibility of FC-based free-space rf clock distribution over short distances.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/OL.34.003346 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Corrective Actions Taxonomy for Healthcare Incidents (CATHI): Insights From Real-world Data on Hospital-reported Incidents.
J Patient Saf
December 2024
EPIUnit, Institute of Public Health of the University of Porto, Porto, Portugal.
Objectives: This study aimed to develop a taxonomy for classifying corrective actions following health care incidents in a Portuguese tertiary hospital.
Methods: The study utilized a multimethods design, combining qualitative and quantitative analyses of real-world data. Thematic analysis was performed, drawing on inductive and deductive approaches.
We demonstrate a hybrid integrated optical frequency comb amplifier composed of a silicon carbide microcomb and a lithium niobate waveguide amplifier, which generates a 10-dB on-chip gain for the C+L band microcombs under 1480-nm laser pumping and an 8-dB gain under 980-nm laser pumping. It will solve the problem of low output power of microcombs and can be applied in various scenarios such as optical communication, lidar, optical computing, astronomical detection, atomic clocks, and more.
View Article and Find Full Text PDFLaser excitation of the 1-2 transition in singly-ionized helium.
Commun Phys
December 2024
LaserLaB, Department of Physics and Astronomy, Vrije Universiteit Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, the Netherlands.
Laser spectroscopy of atomic hydrogen and hydrogen-like atoms is a powerful tool for tests of fundamental physics. The 1-2 transition of hydrogen in particular is a cornerstone for stringent Quantum Electrodynamics (QED) tests and for an accurate determination of the Rydberg constant. We report laser excitation of the 1-2 transition in singly-ionized helium (He), a hydrogen-like ion with much higher sensitivity to QED than hydrogen itself.
View Article and Find Full Text PDFPractical solutions to resolve social barriers to hepatitis C treatment initiation among people who inject drugs: a qualitative study.
Harm Reduct J
December 2024
Disease Elimination Program, Burnet Institute, 85 Commercial Road, Melbourne, VIC, 3004, Australia.
Background: We aimed to identify motivators for people who inject drugs to pursue treatment for hepatitis C virus (HCV) infection and uncover opportunities that could make treatment more appealing.
Methods: Between November 2023 and January 2024, we conducted semi-structured interviews with 15 HCV RNA-positive individuals with a history of injecting drug use and self-reported as either untreated or treated but delayed treatment for more than 6 months. Thematic and framework data analysis was employed and interpreted using the Capability, Opportunity and Motivation (COM-B) framework of behaviour change.
Challenge your customer: How businesses may trigger change in perceived barriers, capability, and consumption.
Appetite
December 2024
MAPP - Centre for Research on Customer Relations in the Food Sector, Department of Management, Aarhus University, Fuglesangsalle 4, 8210, Aarhus, Denmark. Electronic address:
The global environmental issues require that we redesign food systems. Transitioning towards more plant-based diets is crucial, but there is a gap observed between consumers' intention and behaviour. We propose that businesses in the food sector can play a role by challenging their potential customers to overcome the gap.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!