Without interruption or affecting the transmission of ordinary payload channels, we propose a real time polarization mode dispersion (PMD) monitoring system for long-haul, multiple erbium-doped fiber amplifier (EDFA), dense wavelength division multiplexing (DWDM) optical fiber transmission using modulated amplified spontaneous emission (ASE) of one of the EDFAs as the supervisory (SV) signal source. An acousto-optic tunable filter (AOTF) at the receiver side is adopted to scan the spectrum of the transmitted ASE SV signal. Using the fixed-analyzer method, PMDs of different wavelength bands that range from 1545 to 1580 nm of a DWDM fiber-optic communication system can be found by adaptively changing the radio frequency of the AOTF. The resolution and the measuring range of the proposed monitoring system can be significantly improved by cascading the AOTFs at the receiver side.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/ao.48.000c92 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Extremal structures with embedded prefailure indicators.
Proc Natl Acad Sci U S A
February 2025
Department of Construction Sciences, Lund University, Lund SE-22100, Sweden.
Preemptive identification of potential failure under loading of engineering structures is a critical challenge. Our study presents an innovative approach to design built-in prefailure indicators within multiscale structural designs with optimized load carrying capabilities utilizing the design freedom of topology optimization. The indicators are engineered to visibly signal load conditions approaching the global critical buckling load at predefined locations.
View Article and Find Full Text PDFIntroduced substrates trigger colonization by reef-associated fish in a degraded coastal system.
PLoS One
January 2025
Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, Netherlands.
Coastal reefs benefit the survival and growth of mobile organisms by providing shelter and increased food availability. Under increasing pressure from human activities, the coverage of subtidal reefs has decreased along the world's coasts. This decline is motivating efforts to restore these important habitats by re-introducing hard substrates into the coastal zone.
View Article and Find Full Text PDFManagement of Psychosis and Schizophrenia by Primary Care GPs: A Cross-Sectional Study in Spain.
J Prim Care Community Health
January 2025
Instituto de Investigación Biomédica de Málaga, Málaga, Spain.
Aim: To investigate the detection and initial management of first psychotic episodes, as well as established schizophrenia, within the primary care of the Andalusian Health System.
Background: Delay in detecting and treating psychosis is associated with slower recovery, higher relapse risk, and poorer long-term outcomes. Often, psychotic episodes go unnoticed for years before a diagnosis is established.
Effectiveness and Safety in Patients with Non-Valvular Atrial Fibrillation Who Switched from Warfarin to Direct Oral Anticoagulants in Medicare Population.
Adv Ther
January 2025
Department of Hospital Medicine, Ochsner Health System, New Orleans, LA, 70121, USA.
Introduction: Atrial fibrillation (AF), a common heart rhythm abnormality, is linked to a higher risk of stroke. Traditionally, warfarin has been the primary anticoagulation treatment for reducing the stroke risk. The new standard of treatment by direct oral anticoagulants (DOACs) offers greater benefits including improved efficacy and fewer adverse effects with reduced monitoring.
View Article and Find Full Text PDFOutcomes and efficacy of robotic-assisted radical prostatectomy using the CMR Versius platform: a prospective study on 118 patients with 1-year follow-up.
Int Urol Nephrol
January 2025
Department of Urology, Faculty of Medicine, Cairo University, Cairo, Egypt.
Objective: To evaluate the outcomes and efficacy of robot-assisted radical prostatectomy (RARP) using the Versius robotic surgical system, aiming to provide comprehensive data on perioperative outcomes, postoperative recovery, and complications.
Patient And Methods: All cases of RARP using the CMR Versius platform performed at Cairo University Hospital over a two-year period were enrolled in this study. All patients had pathologically confirmed prostate cancer in both localized and locally advanced stages.
Want 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!