Crystals, 2021 An efficient enhancement of 2.78 μm emission from the transition of Er3+: 4I11/2 → 4I13/2 by Tm3+ introduction in the Er/Tm: PbF2 crystal was grown by the Bridgman technique for the first time. The spectroscopic properties, energy transfer mechanism, and
Jiayu Liao +10 more
doaj +1 more source
Broadband Backhaul Communication for Stratospheric Platforms: The Stratospheric Optical Payload Experiment (STROPEX) [PDF]
, 2006 A high bitrate optical downlink was performed by the stratospheric optical payload experiment (STROPEX), a part of the EU CAPANINA project. The STROPEX objectives were to design and build the necessary hardware to demonstrate an optical backhaul downlink
Knapek, Markus +9 more
core +1 more source
Ultra-narrow Band Perfect Absorber and Its Application as Plasmonic Sensor in the Visible Region
Nanoscale Research Letters, 2017 We propose and numerically investigate a perfect ultra-narrowband absorber with an absorption bandwidth of only 1.82 nm and an absorption efficiency exceeding 95% in the visible region.
Dong Wu +8 more
doaj +1 more source
Design of a 0.13 µm SiGe Limiting Amplifier with 14.6 THz Gain-Bandwidth-Product [PDF]
Advances in Radio Science, 2017 This paper presents the design of a limiting amplifier with 1-to-3 fan-out implementation in a 0.13 µm SiGe BiCMOS technology and gives a detailed guideline to determine the circuit parameters of the amplifier for optimum high-frequency performance ...
S. Park +3 more
doaj +1 more source
The effect of atmospheric turbulence on the performance of the free space optical communications [PDF]
, 2008 In free space optical (FSO) communication links, atmospheric turbulence has a significant impact on the quality of a laser beam propagating through the atmosphere.
Ghassemlooy, Zabih +7 more
core +1 more source
Optical High-Capacity Satellite Downlinks via High-Altitude Platform Relays [PDF]
, 2007 Earth-observation (EO) satellite missions produce a large amount of data using high-resolution optical or radar sensors. During the last decades the amount of data has steadily increased due to improved sensor technologies with increased temporal ...
Florian Moll +13 more
core +1 more source
Investigation into the integration of a resonant tunnelling diode and an optical communications laser: model and experiment [PDF]
, 2007 A resonant tunnelling diode has been monolithically integrated with an optical communications laser [the resonant tunnelling diode (RTD-LD)] to form a simple optoelectronic integrated circuit (OEIC) that is a novel bistable device suitable for an optical
T.J. Slight +3 more
core +2 more sources
Optical wireless for intravehicle communications : a channel viability analysis [PDF]
, 2012 This paper provides an initial analysis into the viability of implementing an optical wireless system for intravehicle communications. Based on the use of a simple linearly scalable infrared light-emitting-diode transmitter, the results for received ...
Mark S. Leeson +5 more
core +1 more source
Results of the Optical Downlink Experiment KIODO from OICETS Satellite to Optical Ground Station Oberpfaffenhofen (OGS-OP) [PDF]
, 2007 Optical LEO downlinks from the Japanese OICETS to the optical ground station built by the German Aerospace Center (DLR) near Munich have been performed. This was the first optical LEO downlink on European grounds.
Perlot, Nicolas +13 more
core +1 more source
Lambertian source modelling of free space optical ground-to-train communications [PDF]
, 2012 There is a increasing demand for high speed data services while travelling on trains and other means of public transportation. Hence, an alternative technology to radio frequency (RF) communications called free space optics (FSO) could be used to provide
Ghassemlooy, Zabih +9 more
core +1 more source