High-efficient 650 nm laser bars with an output power of about 10 W and a wall-plug efficiency of 30%

2006 ◽  
Author(s):  
Bernd Sumpf ◽  
Martin Zorn ◽  
Ralf Staske ◽  
Jörg Fricke ◽  
Peter Ressel ◽  
...  
Keyword(s):  
Output Power ◽  
High Efficient ◽  
Wall Plug Efficiency

scholarly journals InAs/GaSb superlattice interband cascade light emitting diodes with high output power and high wall-plug efficiency

2019 ◽  
Vol 114 (25) ◽  
pp. 253507 ◽  
Author(s):  
Yi Zhou ◽  
Qi Lu ◽  
Xuliang Chai ◽  
Zhicheng Xu ◽  
Jianxin Chen ◽  
...  
Keyword(s):  
Output Power ◽  
Light Emitting Diodes ◽  
High Output Power ◽  
Light Emitting ◽  
Wall Plug Efficiency ◽  
High Output

scholarly journals Improving Emission Uniformity of InGaN/GaN-Based Vertical LEDs by Using Reflective ITO/Ag n-Contact

Electronics ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 975
Author(s):  
Woong-Sun Yum ◽  
Ji-Hyun Koo ◽  
Dae-Hee Lee ◽  
Young-Hoon Kim ◽  
Young-Kyu Jeong ◽  
...  
Keyword(s):  
Output Power ◽  
Light Emitting Diodes ◽  
Reference Sample ◽  
Light Output ◽  
Light Output Power ◽  
Forward Voltage ◽  
Light Emitting ◽  
Wall Plug Efficiency ◽  
Chip Size ◽  
Reference Samples

We investigated the effect of Ti/Al and ITO/Ag n-type contacts on the emission uniformity and light output of different chip-size vertical-geometry light-emitting diodes (VLEDs) for vehicle headlamp application. The forward voltage of the Ti/Al-based reference VLEDs decreased from 3.38 to 3.20 V at 1500 mA with increasing chip size from (1280 × 1000 µm2) to (1700 × 1700 µm2), whereas that of the ITO/Ag-based samples changed from 3.37 to 3.15 V. Regardless of chip size, the ITO/Ag-based samples revealed higher light output power than the reference samples. For example, the ITO/Ag-based samples (chip size of 1700 × 1700 µm2) exhibited 3.4% higher light output power at 1500 mA than the reference samples. The ITO/Ag samples underwent less degradation in the Wall-plug efficiency (WPE) than the reference sample. For instance, the ITO/Ag-based samples (1700 × 1700 µm2) gave 4.8% higher WPE at 1500 mA than the reference samples. The ITO/Ag-based samples illustrated more uniform emission than the Ti/Al-based sample. Both the reference and ITO/Ag-based samples underwent no degradation when operated at 1500 mA for 1000 h.

Research on Electric-Fluid Mechanics with Intermittent Oscillatory of RCC Circuit

2015 ◽  
Vol 730 ◽  
pp. 297-302
Author(s):  
Wei Zhou Hou
Keyword(s):  
Output Power ◽  
High Performance ◽  
Low Cost ◽  
Pulse Signal ◽  
Price Ratio ◽  
Flyback Converter ◽  
High Efficient ◽  
Large Scope ◽  
Supply Equipment ◽  
Switch Circuit

RCC circuit (self-oscillating flyback converter) is a kind of high efficient working circuit by use of several devices, but excessive control current will cause the occur of intermittent oscillation. And then the oscillation frequency of the circuit change in a large scope (from hundreds of hertz to several thousand hertz). In addition, the output power is more likely to make the transformer device to produce abnormal noise. However, this phenomenon is not completely useless. After improving the RCC circuit can be conclude that the circuit can start in applying a pulse signal if the output power is small. The switch circuit operates in low-power state by means of intermittent oscillation. The result is that RCC circuit have high performance price ratio and low cost, so it is a widely used in high performance power supply equipment.

ISM 2.45 GHz band high-efficient 15 W GaN HEMT power amplifier: design validation

2019 ◽  
Vol 11 (7) ◽  
pp. 546-553 ◽  
Author(s):  
Marcin Góralczyk ◽  
Wojciech Wojtasiak
Keyword(s):  
Output Power ◽  
Power Amplifier ◽  
High Efficiency ◽  
Power Level ◽  
High Gain ◽  
Output Power Level ◽  
Tuning Method ◽  
Gan Hemt ◽  
High Efficient ◽  
Amplifier Design

AbstractThis paper describes the development of a power amplifier operating over a 2.4–2.5 GHz frequency range with the output power level more than 15 W and 60% PAE. The transistor applied was the 10 W (13 W Psat) power GaN HEMT (CGH40010F from Wolfspeed) recommended up to 6 GHz. A harmonic tuning method was used to achieve even 30% more output power than the CGH40010 transistor was specified to deliver while maintaining high gain and high efficiency. Furthermore, an accuracy analysis of amplifier design was also conducted. It included validation and correction of the available transistor models as well as validation of the models of microstrip circuits implemented in ADS. Finally, it was concluded that both the mentioned sources of errors contributed at a similar level.

scholarly journals 16 W output power by high-efficient spectral beam combining of DBR-tapered diode lasers

2011 ◽  
Vol 19 (2) ◽  
pp. 1228 ◽  
Author(s):  
André Müller ◽  
Deepak Vijayakumar ◽  
Ole Bjarlin Jensen ◽  
Karl-Heinz Hasler ◽  
Bernd Sumpf ◽  
...  
Keyword(s):  
Output Power ◽  
Diode Lasers ◽  
Beam Combining ◽  
High Efficient ◽  
Spectral Beam Combining

Caffeine supplementation for 4-day, followed by acute ingestion, did not impact triathlete output power after submaximal intensity exercise

2019 ◽  
Vol 18 (3) ◽  
pp. 118
Author(s):  
Anderson Pontes Morales ◽  
Felipe Sampaio-Jorge ◽  
Thiago Barth ◽  
Alessandra Alegre De Matos ◽  
Luiz Felipe Da Cruz Rangel ◽  
...  
Keyword(s):  
Blood Lactate ◽  
Output Power ◽  
Body Mass ◽  
Effect Size ◽  
Power Output ◽  
Anaerobic Power ◽  
Lactate Concentration ◽  
Wingate Test ◽  
Large Effect Size ◽  
Acute Ingestion

Introduction: The aim of this study was to test the hypothesis that caffeine supplementation (6 mg·kg-1 body mass) for 4-days, followed by acute intake, would impact five male triathletes output power after performed submaximal intensity exercise. Methods: This was a randomized, double-blind, placebo-controlled crossover study, placebo (4-day) - placebo (acute) PP, placebo (4-days) -caffeine (acute) PC, and caffeine (4-day) - caffeine (acute) CC. Participants abstained from dietary caffeine sources for 4 days and ingested capsules containing either placebo or caffeine (6 mg.kg-1 body mass day in one absorption). The acute trials the capsules containing placebo or caffeine (6 mg.kg-1 body mass day in one absorption) were ingested 60min before completing exercise in a treadmill for 40min (80% VO2max) and to perform the Wingate test. Results: Blood lactate was determined before, 60min after ingestion, and immediately after the exercise on the treadmill, the Wingate test, and after the recovery (10-min). CC and PC trials did not change the cardiopulmonary variables (P>0.05) and the anaerobic power variables (peak/mean power output and fatigue index) (P>0.05). The PC trial compared with PP promoted improvements in the curve power output in 2 sec by 31.19% (large effect-size d = 1.08; P<0.05) and 3 sec by 20% (large effect-size d = 1.19; P<0.05). A 10min recovery was not sufficient to reduce blood lactate concentration in the PC trial compared with PP (PC, 13.73±2.66 vs. PP, 10.26±1.60 mmol.L-1; P<0.05, respectively) (P<0.05). Conclusion: In conclusion, these results indicate that caffeine supplementation (6 mg·kg-1 body mass) for 4 days, followed by acute ingestion, did not impact the triathletes output power after performed submaximal intensity exercise. Nutritional interventions may help researchers and athletes to adapt strategies for manipulating caffeine use.Key-words: caffeine metabolism, Wingate test, blood lactate, performance.

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