Characterization of the optical properties of GaN:Fe for high voltage photoconductive switch applications

2015 ◽  
Author(s):  
V. Meyers ◽  
D. Mauch ◽  
J. Mankowski ◽  
J. Dickens ◽  
A. Neuber
Keyword(s):  
Optical Properties ◽  
High Voltage ◽  
Photoconductive Switch

scholarly journals Growth and Characterization of Single Crystalline Bi4Ge3O12Fibers for Electrooptic High Voltage Sensors

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Stephan Wildermuth ◽  
Klaus Bohnert ◽  
Hubert Brändle ◽  
Jean-Marie Fourmigue ◽  
Didier Perrodin
Keyword(s):  
Optical Properties ◽  
Electric Field ◽  
High Voltage ◽  
Bismuth Germanate ◽  
Czochralski Technique ◽  
Voltage Sensors ◽  
Fiber Growth ◽  
Electric Insulation ◽  
Lower Electric Field

The micro-pulling-down technique for crystalline fiber growth is employed to grow fibers and thin rods of bismuth germanate, Bi4Ge3O12(BGO), for use in electrooptic high voltage sensors. The motivation is the growth of fibers that are considerably longer than the typical lengths (100–250 mm) that are achieved by more conventional growth techniques like the Czochralski technique. At a given voltage (several hundred kilovolts in high voltage substation applications) longer sensors result in lower electric field strengths and therefore more compact and simpler electric insulation. BGO samples with lengths up to 850 mm and thicknesses from 300 μm to 3 mm were grown. Particular challenges in the growth of BGO fibers are addressed. The relevant optical properties of the fibers are characterized, and the electrooptic response is investigated at voltages up to .

scholarly journals Comparison of ISS–CATS and CALIPSO–CALIOP Characterization of High Clouds in the Tropics

2020 ◽  
Vol 12 (23) ◽  
pp. 3946
Author(s):  
Pasquale Sellitto ◽  
Silvia Bucci ◽  
Bernard Legras
Keyword(s):  
Optical Properties ◽  
Space Station ◽  
Satellite Observation ◽  
Observation Data ◽  
Upper Troposphere ◽  
Cloud Properties ◽  
Synchronous Orbit ◽  
The Tropics ◽  
High Clouds

Clouds in the tropics have an important role in the energy budget, atmospheric circulation, humidity, and composition of the tropical-to-global upper-troposphere–lower-stratosphere. Due to its non-sun-synchronous orbit, the Cloud–Aerosol Transport System (CATS) onboard the International Space Station (ISS) provided novel information on clouds from space in terms of overpass time in the period of 2015–2017. In this paper, we provide a seasonally resolved comparison of CATS characterization of high clouds (between 13 and 18 km altitude) in the tropics with well-established CALIPSO (Cloud–Aerosol Lidar and Infrared Pathfinder Satellite Observation) data, both in terms of clouds’ occurrence and cloud optical properties (optical depth). Despite the fact that cloud statistics for CATS and CALIOP are generated using intrinsically different local overpass times, the characterization of high clouds occurrence and optical properties in the tropics with the two instruments is very similar. Observations from CATS underestimate clouds occurrence (up to 80%, at 18 km) and overestimate the occurrence of very thick clouds (up to 100% for optically very thick clouds, at 18 km) at higher altitudes. Thus, the description of stratospheric overshoots with CATS and CALIOP might be different. While this study hints at the consistency of CATS and CALIOP clouds characterizaton, the small differences highlighted in this work should be taken into account when using CATS for estimating cloud properties and their variability in the tropics.

Assessment of the characterization of nonabsorbing nanoparticles in suspension from effective optical properties

2015 ◽  
Vol 54 (31) ◽  
pp. 9082 ◽  
Author(s):  
R. Márquez-Islas ◽  
C. Sánchez-Pérez ◽  
A. García-Valenzuela
Keyword(s):  
Optical Properties

Surface characterization of float glass related to changes in the optical properties after reheating

2001 ◽  
Vol 31 (2) ◽  
pp. 87-92 ◽  
Author(s):  
Yasuo Hayashi ◽  
Ryoji Akiyama ◽  
Masahiro Kudo
Keyword(s):  
Optical Properties ◽  
Surface Characterization ◽  
Float Glass
Sign in / Sign up

Export Citation Format

Share Document