ABSTRACT
A record 730 nm parametric conversion in silica fiber from the near-infrared to the short-wave infrared band is reported and analyzed. A parametric gain in excess of 30 dB was measured for a signal at 1300 nm (with corresponding idler at 2030 nm). This conversion was performed in a travelling single-pass one-pump parametric architecture and high efficiency is achieved by a combination of high peak power and a nonlinear fiber with a reduced fourth-order dispersion coefficient.
Subject(s)
Amplifiers, Electronic , Computer-Aided Design , Fiber Optic Technology/instrumentation , Lighting/instrumentation , Models, Theoretical , Oscillometry/instrumentation , Silicon Dioxide/chemistry , Computer Simulation , Equipment Design , Equipment Failure Analysis , Infrared Rays , Optics and Photonics/instrumentationABSTRACT
The study aimed to determine rates and types of patient restraint, and their relationship to age, gender and immigrant background. The study retrospectively examined routinely collected data and data from restraint protocols in a department of acute psychiatry over a 2-year period. Each patient is only counted once in this period, controlling for readmission. Of 960 admitted patients, 14% were exposed to the use of restraints. The rate was significantly higher among patients with immigrant background, especially in the younger age groups. Most commonly used were mechanical restraint alone for native-born patients and a combination of mechanical and pharmacological restraints for patients with immigrant background. The use of restraints decreased when patients reached 60 years. Both patients' age and immigrant background seem to have an impact on the use of restraint.
