AI Article Synopsis
- The study analyzes how nonlinearity affects two types of photodetectors (PDs)—a standard PD and a modified uni-traveling carrier (MUTC) PD—when using an RF-modulated frequency comb generated by 100-fs optical pulses.
- It focuses on nonlinear saturation caused by high peak-to-average-power ratios and examines second- and third-order intermodulation distortion products (IMD2 and IMD3) for each comb line rather than just general signals.
- Findings indicate that the MUTC PD experiences more significant nonlinear distortion at higher frequencies compared to the standard PD.
Article Abstract
We calculate the impact of nonlinearity in both a -- photodetector (PD) and a modified uni-traveling carrier (MUTC) PD on an RF-modulated frequency comb generated using 100-fs optical pulses with a 50-MHz repetition rate. We take into account bleaching (nonlinear saturation) that is due to the high peak-to-average-power ratio and contributes to the device nonlinearity. Nonlinear impairment of an RF-modulated continuous wave is typically characterized by the second- and third-order intermodulation distortion products (IMD2 and IMD3). In contrast, an RF-modulated frequency comb must be characterized by a distinct 2 and 3 for each comb line . We calculate 2 and 3 in both -- and MUTC PDs and compare the results. We also calculate the ratio of the 2 power and the 3 power to the fundamental power in both -- and MUTC PDs. We find that nonlinear distortion has a greater impact at high frequencies in the MUTC PD than in the -- PD.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/OL.414026 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Diminished salivary cortisol response to mental stress predict all-cause mortality in general population.
J Psychosom Res
December 2024
The Second Clinical Medical College, Jinan University, Shenzhen 518020, China; Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University, The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen 518020, China; School of Medicine, Southern University of Science and Technology, Shenzhen 518055, China. Electronic address:
Objectives: To characterize individuals with a diminished salivary cortisol response to mental stress, assess its association with all-cause mortality, and quantify the mediating effects of the most relevant and modifiable factors to identify potential target for prevention.
Methods: Data from MIDUS II study with a 16-year follow-up, were used to categorize 1129 participants as responders or non-responders based on the existence of increase in salivary cortisol under mental stress. LASSO-logistics analysis identified the most relevant factors.
Complexity Control in Artificial Self-Organizing Systems: The Case of Bottom-Up versus Top-Down Intervention When Managing Pandemic Contagion.
Nonlinear Dynamics Psychol Life Sci
January 2025
Adelphi University, Garden City, NY.
We model an adaptive agent-based environment using selfish algorithm agents (SA-agents) that make decisions along three choice dimensions as they play the multi-round prisoner's dilemma game. The dynamics that emerge from mutual interactions among the SA-agents exhibit two collective-level properties that mirror living systems, thus making these models suitable for societal/biological simulation. The properties are: emergent intelligence and collective agency.
View Article and Find Full Text PDFImpact of neutrophil percentage-to-albumin ratio on mortality in iron-deficiency anemia patients: a retrospective study using MIMIC-IV database.
Eur J Med Res
January 2025
Department of Ultrasonography, The First Hospital of PuTian City, Nanmen West Road, Chengxiang District, Putian, People's Republic of China.
Background: In the intensive care unit (ICU), the incidence of iron-deficiency anemia (IDA) is relatively high and is associated with various adverse clinical outcomes. Therefore, it is crucial to identify simple and practical indicators to assess the mortality risk in ICU patients with IDA. This study aims to investigate the relationship between the Neutrophil Percentage-to-Albumin Ratio (NPAR) levels in patients with IDA in the ICU and their all-cause mortality at 30 and 365 days.
View Article and Find Full Text PDFAssociation of serum chloride levels with all-cause mortality among patients in surgical intensive care units: a retrospective analysis of the MIMIC-IV database.
BMC Anesthesiol
January 2025
Department of General Medicine, Shaoxing Central Hospital, Shaoxing, Zhejiang, 312030, China.
This study explores the association between serum chloride concentrations and all-cause mortality among patients in the Surgical Intensive Care Unit (SICU). Employing a retrospective cohort design, the study utilized data extracted from the Medical Information Mart for Intensive Care IV (MIMIC-IV) database, specifically focusing on individuals admitted to the surgical/trauma ICUs. This dataset encompassed demographic profiles, laboratory findings, historical medical data, vital statistics, and variables pertinent to prognosis.
View Article and Find Full Text PDFPreoperative estimated glomerular filtration rate to predict cardiac events in major noncardiac surgery: a secondary analysis of two large international studies.
Br J Anaesth
January 2025
Population Health Research Institute, Hamilton, ON, Canada; Department of Medicine, McMaster University, Hamilton, ON, Canada.
Background: Optimised use of kidney function information might improve cardiac risk prediction in noncardiac surgery.
Methods: In 35,815 patients from the VISION cohort study and 9219 patients from the POISE-2 trial who were ≥45 yr old and underwent nonurgent inpatient noncardiac surgery, we examined (by age and sex) the association between continuous nonlinear preoperative estimated glomerular filtration rate (eGFR) and the composite of myocardial injury after noncardiac surgery, nonfatal cardiac arrest, or death owing to a cardiac cause within 30 days after surgery. We estimated contributions of predictive information, C-statistic, and net benefit from eGFR and other common patient and surgical characteristics to large multivariable models.
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!