Near-complete stored energy extraction from fiber amplifiers in ultrashort >10mJ energy pulses using coherent pulse stacking amplification (Conference Presentation)

2018 ◽  
Author(s):  
Hanzhang Pei ◽  
John Ruppe ◽  
Siyun Chen ◽  
Morteza Sheikhsofla ◽  
John Nees ◽  
...  
Keyword(s):  
Fiber Amplifiers ◽  
Energy Extraction ◽  
Stored Energy ◽  
Coherent Pulse

What is the Best Solution to Improve Thermal Performance of Storage Tanks With Immersed Heat Exchangers: Baffles or a Divided Tank?

2009 ◽  
Vol 131 (3) ◽  
Author(s):  
Aaron D. Wade ◽  
Jane H. Davidson ◽  
Julia F. Haltiwanger
Keyword(s):  
Heat Exchanger ◽  
Thermal Performance ◽  
Heat Exchangers ◽  
Thermal Stratification ◽  
Water Storage ◽  
Energy Extraction ◽  
Storage Tanks ◽  
Stored Energy ◽  
Tubular Heat Exchanger ◽  
Potential Methods

Prior studies of indirect water storage tanks that employ an immersed heat exchanger to discharge the stored energy identified two potential methods of improving the rate of energy extraction: (1) an internal baffle to increase the velocity across the heat exchanger and (2) a divided storage compartment to achieve thermal stratification. The relative benefits of the two options are compared and recommendations for implementation are provided based in part on measurements in a 350 l tank with a 10 m long, 0.3 m2 coiled tubular heat exchanger.

Preliminary Analysis and Testing of the AWOG: A Novel Non-Rotational Wind Energy Extraction Device

2011 ◽  
Author(s):  
Jesse J. French ◽  
Colton T. Sheets
Keyword(s):  
Wind Tunnel ◽  
Wind Energy ◽  
Turbulent Flows ◽  
Power Output ◽  
Energy Extraction ◽  
Stored Energy ◽  
Practical Applications ◽  
Micro Scale ◽  
Aspect Ratios ◽  
Extraction Device

This paper highlights the work done by the authors to develop and test a novel, biologically inspired, non-rotational wind energy extraction device. This device capitalizes on the principles of a wind deflected shaft and vortex induced vibrations to generate micro-scale power. Piezoelectric and magnetic flux methods are explored as options to convert the stored energy of mechanical deflection to electrical power. The device is modeled after long-stemmed grasses, grains, and bamboos and geometrically mimics their aspect ratio in order to replicate their movement in low altitude, turbulent flows. This design is based on a significant sampling of the shaft aspect ratios and head shapes of naturally occurring biological samples collected in the field. This concept has been affectionately christened the AWOG (Amber Waves of Grain) and shows promise for use in highly turbulent, low-level air flows close to the ground or mounting surface. Potential operating sites of the AWOG, include locations very close to ground level, along building rooflines, and in urban settings. To determine the efficiency and power output of a single AWOG unit, wind tunnel testing and in-situ field testing were performed. Power stored in a single deflected AWOG has been experimentally determined to be 430 w/m^2, which is comparable to existing wind turbine designs. Initial tests outlined in this paper are only able to recover a fraction of the stored energy. Practical applications of AWOG units would be to use them in formation and examinations are included for several proposed grouping methods. Analysis is performed to determine the ideal arrangement for grouped AWOG units based on experimental and field data from biological specimens and wind tunnel tests. This includes analyzing the effect that different configurations have on individual power output and efficiency of the formation as a whole. Recommendations are made as to the feasibility of use in a variety of settings and consideration is given concerning scaling of the AWOG to the micro-scale and to larger scales.

10mJ Energy Extraction from Yb-doped 85µm core CCC Fiber using Coherent Pulse Stacking Amplification of fs Pulses

2017 ◽  
Author(s):  
Hanzhang Pei ◽  
John Ruppe ◽  
Siyun Chen ◽  
Morteza Sheikhsofla ◽  
John Nees ◽  
...  
Keyword(s):  
Energy Extraction ◽  
Coherent Pulse

Multi-mJ energy extraction using Yb-fiber based coherent pulse stacking amplification of fs pulses (Conference Presentation)

2017 ◽  
Author(s):  
John M. Ruppe ◽  
Hanzhang Pei ◽  
Siyun Chen ◽  
Morteza Sheikhsofla ◽  
Russell B. Wilcox ◽  
...  
Keyword(s):  
Energy Extraction ◽  
Coherent Pulse

Halogenation of ORMOSIL: A Promising Rout for Tailoring Optical Absorptions

2003 ◽  
Vol 771 ◽  
Author(s):  
Amir Fardad ◽  
Wei Liang ◽  
Yadong Zhang ◽  
Bryson Case ◽  
Shibin Jiang ◽  
...  
Keyword(s):  
Process Parameters ◽  
Sol Gel ◽  
Fiber Amplifiers ◽  
Grignard Reaction ◽  
Coupling Loss ◽  
Beam Splitters ◽  
Silicon Technology ◽  
Sol Gel Process ◽  
Propagation Losses ◽  
Signal Intensities

AbstractFluorinated and photo-imageable precursors are synthesized through a Barbier-Grignard reaction for 1550-nm window. The precursors are used for the sol-gel process of integrated optic components for silica-on-silicon technology. Material compositions and process parameters are optimized to achieve internal absorptions >0.1 dB/cm and propagation losses of about 0.5 dB/cm at 1550 nm. Compact 1×16 Beam splitters are designed and fabricated which exhibit >0.3 dB power uniformity, >0.1 dB PDL and 1.5 dB coupling loss. By hybrid integration of the passive splitters and in-house fiber amplifiers, amplifying splitters are demonstrated at various signal intensities.

SOLID-STATE COHERENT PULSE RADAR IN MILLIMETER WAVEBAND FOR DETECTION OF LOW-PROFILE SURFACE VESSELS

2014 ◽  
Vol 73 (8) ◽  
pp. 705-717
Author(s):  
G. I. Khlopov ◽  
A. V. Zorenko ◽  
A. L Teplyuk ◽  
C. Plueschke ◽  
J. Wolff ◽  
...  
Keyword(s):  
Solid State ◽  
Millimeter Waveband ◽  
Pulse Radar ◽  
Low Profile ◽  
Surface Vessels ◽  
Coherent Pulse
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