scholarly journals Power and Spectral Range Characteristics for Optical Power Converters

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4395
Author(s):  
Simon Fafard ◽  
Denis Masson ◽  
Jan-Gustav Werthen ◽  
James Liu ◽  
Ta-Chung Wu ◽  
...  
Keyword(s):  
Laser Diode ◽  
Spectral Range ◽  
High Performance ◽  
High Efficiency ◽  
Power Converters ◽  
Electrical Power ◽  
Optical Power ◽  
Power Outputs ◽  
External Loads ◽  
Power Class

High-performance optical power converters (OPCs) enable isolated electrical power and power beaming applications at new wavelengths and higher output powers. Broadcom’s vertical epitaxial heterostructure architecture (VEHSA) multi-junction OPCs permit optical-to-electrical conversion at high efficiency and at manageable external loads. This study provides details of how the power outputs have been extended from <1 W to a power class at ~3 W and another class at >20 W. The work also provides details of how the spectral range options have been extended from 800–830 nm to other key laser diode wavelengths such as 960–990 nm and 1500–1600 nm.

High-Efficiency Photovoltaic Power Converters and Application to Optical Power Transmission

2021 ◽  
Author(s):  
S. Fafard ◽  
D. Masson ◽  
J.G. Werthen ◽  
J. Liu ◽  
T.C. Wu ◽  
...  
Keyword(s):  
High Efficiency ◽  
Power Converters ◽  
Power Transmission ◽  
Optical Power ◽  
Photovoltaic Power

scholarly journals A Verification of High-efficiency DC Micro-grid Power Systems with High-performance Power Converters and Energy Management Strategy

2014 ◽  
Vol 18 ◽  
pp. 47-52 ◽  
Author(s):  
Tomokazu Mishima ◽  
Ittetsu Taniguchi ◽  
Hisashi Tamaki ◽  
Youichi Kitagawa ◽  
Kouji Yutani ◽  
...  
Keyword(s):  
Power Systems ◽  
Energy Management ◽  
Management Strategy ◽  
High Performance ◽  
High Efficiency ◽  
Power Converters ◽  
Energy Management Strategy ◽  
Micro Grid

High Performance Photocathodes with 50% Quantum Efficiency

2005 ◽  
Vol 480-481 ◽  
pp. 445-448 ◽  
Author(s):  
P.D. Townsend ◽  
R.J. Downey ◽  
S.W. Harmer ◽  
A.N. Cormack ◽  
R. Mcalpine
Keyword(s):  
Quantum Efficiency ◽  
Spectral Range ◽  
High Performance ◽  
High Efficiency ◽  
High Transparency ◽  
Operating Range

Multialkali photocathodes are used from 200 to 850 nm, but high transparency at longer wavelengths reduces the quantum efficiencies. Theoretically, routes to enhance absorption could achieve high efficiency over most of this spectral range. Realisations of some of the concepts have been successfully attempted leading to quantum efficiencies of ~50%, with examples from 200 to 750 nm. Improvement factors of up to 50 times occur by ~900 nm, giving an extension of the useful wavelength operating range.

scholarly journals Power Density Maximization in Medium Frequency Transformers by Using Their Maximum Flux Density for DC–DC Converters

Electronics ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 470
Author(s):  
Dante Ruiz-Robles ◽  
Edgar L. Moreno-Goytia ◽  
Vicente Venegas-Rebollar ◽  
Nadia M. Salgado-Herrera
Keyword(s):  
Flux Density ◽  
Power Density ◽  
High Performance ◽  
High Efficiency ◽  
Electrical Power ◽  
Power Grids ◽  
Medium Frequency ◽  
Maximum Flux ◽  
Conventional Procedure ◽  
Core Losses

The medium frequency transformer (MTF) is a key component of various new DC–DC converters that are designed for applications in modern electrical power grids at medium and high voltage. To attain the high performance that are necessary for targeting these applications, MFTs should have high power density and high efficiency as characteristics. For this endeavor, newly designed MFT procedures, which also take advantages of new core materials, are under investigation. Differently to other design proposals, most of which use conventional transformer design procedures based on equating core losses to copper conduction losses, in this paper, an MTF with a nanocrystalline (VITROPERM 500F) core is designed with a new procedure that is oriented in aiming the maximum flux density (Bmax). The characteristics of the MFTs that are obtained by using this procedure are compared with those of the MFTFs that are designed with a conventional procedure. The results show that by using the proposed technique, we get a 25% reduction in the winding size, a higher power density, and a lower MTF building cost while maintaining a high efficiency (>98%). The design methodology is developed through a rigorous mathematical analysis that is verified with computer simulations in Matlab-Simulink and validated with experimental results from two MTF laboratory prototypes designed at a flux density of 0.9 T (75% Bmax) and 1.2 T (Bmax).

Field and Application Experience of the Titan 130 Industrial Gas Turbine

2001 ◽  
Author(s):  
George Rocha ◽  
Rainer Kurz
Keyword(s):  
Gas Turbine ◽  
Development Strategy ◽  
High Performance ◽  
High Efficiency ◽  
Electrical Power ◽  
Field Evaluation ◽  
Operating Conditions ◽  
Pollutant Emissions ◽  
Evaluation Program ◽  
Industrial Gas Turbine

The two-shaft Titan 130 industrial gas turbine was introduced into commercial service in 1998 and has gained field experience in mechanical-drive and compressor-set applications. A single-shaft configuration is also available for electrical power generation applications. The 14-MW class two-shaft engine is nominally rated at 19,500 hp with a simple-cycle efficiency of more than 35% at ISO operating conditions. It is available with two combustor options: a dry, low-pollutant emissions combustion system featuring Solar’s proven SoLoNOx technology or a diffusion-flame type combustor adapted from Solar’s proven Mars gas turbine. The Titan 130 gas turbine design is an aerodynamic scale of the existing Taurus 70 product. The unit features a modified Mars air compressor and turbine section components directly scaled from the Taurus 70, resulting in a low-risk product design well-suited for industrial service applications. A major element of the development strategy included an extended field evaluation trial in actual operating conditions to demonstrate overall product durability. The first Titan 130 mechanical-drive package was placed into service at a natural gas pipeline compressor station and successfully completed a planned 8000-hour field evaluation program. Extensive inspection and operating data have been evaluated and the unit continues to operate in normal commercial service. A mechanical-drive package requires the successful marriage between the driver and the driven equipment. Most applications require a combination of high efficiency and high performance flexibility. Emphasis was placed on providing excellent gas compressor coverage for this product. The successful application of such a compression system is discussed and supported by site test data. This paper provides details of the Titan 130 field evaluation program, design enhancements and typical compressor set application performance characteristics.

High Power Diode Laser Source with Wavelength Coupling Technology

2013 ◽  
Vol 710 ◽  
pp. 442-446
Author(s):  
Yuan Yuan Gu ◽  
Guo Xing Wu ◽  
Hui Lu ◽  
Yan Cui
Keyword(s):  
Diode Laser ◽  
Output Power ◽  
Laser Diode ◽  
High Power ◽  
High Efficiency ◽  
Optical Power ◽  
Spot Size ◽  
Laser Source ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion

Laser diode has incited particular interest as photoelectric conversion efficiency, output power and lifetime for a variety of applications in industry processing. The single laser diode optical power has not satisfied for the actual requirements. It demands to couple several diode laser beams into one beam to output directly or by an optical fiber to improve the brightness, and it becomes the central issue to adopt the appropriate beam coupling technology which would offer high quality and high efficiency. In order to output high power, we utilized wavelength coupling technology to couple two laser beam of different wavelength together with beam splitter cube (BSC), the key technology and the principle of wavelength coupling is indicated and analyzed in this paper .Using 808nm and 980nm laser diode realize wavelength coupling with high output power, the efficiency more than 80% and spot size can be achieved after focusing to the beam size of 3×3mm2.

scholarly journals Optical Design for Laser Diode Scanner Headlamp with Efficiently Distributed Optical Power for Adaptive Driving Beam System of Automobiles

2021 ◽  
Vol 11 (2) ◽  
pp. 793
Author(s):  
Hyun Choi ◽  
Won-Sup Lee ◽  
Bairi Sri Harisha ◽  
Wan-Chin Kim ◽  
Jiseok Lim
Keyword(s):  
High Resolution ◽  
Light Source ◽  
Laser Diode ◽  
Optical System ◽  
High Efficiency ◽  
Optical Power ◽  
Scanning System ◽  
Scanning Method ◽  
Optical Scanning ◽  
Optical Scanning System

The illumination optical system using a laser diode has advantages such as small size and high efficiency compared to an optical system using a conventional light source. In particular, its advantages can be maximized in high-resolution spatial light modulation. Based on these advantages, research to apply laser diode scanning to high-resolution adaptive driving beam (ADB) is currently being actively conducted. To construct a high-resolution illumination optical system for an ADB system using a single laser diode as a light source, the configuration of an optical scanning system is essential. In the general high-speed scanning method, the optical power at the center is relatively smaller compared with that at the edge because of the faster scanning speed when the center is illuminated. This causes large losses in automotive lighting optical system where the optical power in the center should be higher. Herein, we propose an optical system that can change the light power distribution of the center and the edge by applying a prism. In addition, by producing a prototype of an optical scanning system, the effect of efficiently distributing optical power by the designed optical scanning system was experimentally verified.

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