scholarly journals Fully–correlated multi–mode pumping for low–noise dual–frequency VECSELs

2018 ◽  
Vol 26 (20) ◽  
pp. 26217 ◽  
Author(s):  
Grégory Gredat ◽  
Debanuj Chatterjee ◽  
Ghaya Baili ◽  
François Gutty ◽  
Isabelle Sagnes ◽  
...  
Keyword(s):  
Low Noise ◽  
Dual Frequency ◽  
Multi Mode

scholarly journals Simulation and Characterization of a Nonlinear Dual-Frequency Piezoelectric Energy Harvester

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 908 ◽  
Author(s):  
Sofiane Bouhedma ◽  
Yuhang Zheng ◽  
Dennis Hohlfeld
Keyword(s):  
Energy Harvester ◽  
Frequency Tuning ◽  
Dual Frequency ◽  
Piezoelectric Energy ◽  
Frequency Agile ◽  
Classical Vibration ◽  
Multi Mode

In this paper, we present a concept, simulation and characterization results of a dual-frequency piezoelectric energy harvester with magnetic frequency tuning capabilities. We demonstrate that the frequency-agile multi-mode capability enables the device to harvest on a wider range of operating frequencies than classical vibration harvesters.

scholarly journals 50 W low noise dual-frequency laser fiber power amplifier

2016 ◽  
Vol 24 (9) ◽  
pp. 9202 ◽  
Author(s):  
Ying Kang ◽  
Lijun Cheng ◽  
Suhui Yang ◽  
Changming Zhao ◽  
Haiyang Zhang ◽  
...  
Keyword(s):  
Power Amplifier ◽  
Low Noise ◽  
Dual Frequency ◽  
Laser Fiber ◽  
Frequency Laser

NanoMagSat, a 16U nanosatellite constellation high-precision magnetic project to initiate permanent low-cost monitoring of the Earth’s magnetic field and ionospheric environment

2021 ◽  
Author(s):  
Gauthier Hulot ◽  
Jean-Michel Léger ◽  
Lasse B. N. Clausen ◽  
Florian Deconinck ◽  
Pierdavide Coïsson ◽  
...  
Keyword(s):  
High Precision ◽  
Geomagnetic Field ◽  
Low Cost ◽  
Low Noise ◽  
Low Earth Orbit ◽  
Dual Frequency ◽  
Observatory Data ◽  
Vector Magnetometer ◽  
Gnss Receivers ◽  
Global Coverage

<p>The geomagnetic field has been continuously monitored from low-Earth orbit (LEO) since 1999, complementing ground-based observatory data by providing calibrated scalar and vector measurements with global coverage. The successful three-satellite ESA Swarm constellation is expected to remain in operation up to at least 2025. Further monitoring the field from space with high-precision absolute magnetometry beyond that date is of critical importance for improving our understanding of dynamics of the multiple components of this field, as well as that of the ionospheric environment. Here, we will report on the latest status of the NanoMagSat project, which aims to deploy and operate a new constellation concept of three identical 16U nanosatellites, using two inclined (approximately 60°) and one polar LEO, as well as an innovative payload including an advanced Miniaturized Absolute scalar and self-calibrated vector Magnetometer (MAM) combined with a set of precise star trackers (STR), a compact High-frequency Field Magnetometer (HFM, sharing subsystems with the MAM), a multi-needle Langmuir Probe (m-NLP) and dual frequency GNSS receivers. The data to be produced will at least include 1 Hz absolutely calibrated and oriented magnetic vector field (using the MAM and STR), 2 kHz very low noise magnetic scalar (using the MAM) and vector (using the HFM) field, 2 kHz local electron density (using the m-NLP) as well as precise timing, location and TEC products. In addition to briefly presenting the nanosatellite and constellation concepts, as well as the evolving programmatic status of the mission (which already underwent a consolidation study funded by the ESA Scout programme), this presentation will illustrate through a number of E2E simulations the ability of NanoMagSat to complement and improve on many of the science goals of the Swarm mission at a much lower cost, and to bring innovative science capabilities for ionospheric investigations. NanoMagSat could form the basis of a permanent collaborative constellation of nanosatellites for low-cost long-term monitoring of the geomagnetic field and ionospheric environment from space.</p>

scholarly journals 434 W all-fiber linear-polarization dual-frequency Yb-doped fiber laser carrying low-noise radio frequency signal

2016 ◽  
Vol 24 (23) ◽  
pp. 26722 ◽  
Author(s):  
Long Huang ◽  
Lei Li ◽  
Pengfei Ma ◽  
Xiaolin Wang ◽  
Pu Zhou
Keyword(s):  
Radio Frequency ◽  
Fiber Laser ◽  
Linear Polarization ◽  
Low Noise ◽  
Dual Frequency ◽  
Frequency Signal ◽  
Radio Frequency Signal

scholarly journals Low-Noise Dual-Frequency Laser for Compact Cs Atomic Clocks

2014 ◽  
Vol 32 (20) ◽  
pp. 3817-3823 ◽  
Author(s):  
Paul Dumont ◽  
Iryna Gozhyk ◽  
Gregoire Beaudoin ◽  
Isabelle Sagnes ◽  
Patrick Georges ◽  
...  
Keyword(s):  
Low Noise ◽  
Atomic Clocks ◽  
Dual Frequency ◽  
Frequency Laser
Sign in / Sign up

Export Citation Format

Share Document