Towards high-power, high-efficiency random fiber lasers: theoretical and experimental investigations

2014 ◽  
Author(s):  
H. Wu ◽  
Z. N. Wang ◽  
M. Q. Fan ◽  
L. Zhang ◽  
Y. J. Rao ◽  
...  
Keyword(s):  
High Power ◽  
Fiber Lasers ◽  
High Efficiency ◽  
Experimental Investigations

High-efficiency (6+1)x1 combiner for high power fiber lasers and amplifiers

2013 ◽  
Author(s):  
Dan Neugroschl ◽  
Jongchul Park ◽  
Mitchell Wlodawski ◽  
Jonathan Singer ◽  
Victor I. Kopp
Keyword(s):  
High Power ◽  
Fiber Lasers ◽  
High Efficiency

scholarly journals High-Power, High-Efficiency Laser Diodes for Pumping Fiber Lasers

2003 ◽  
Vol 31 (8) ◽  
pp. 519-524
Author(s):  
Hirofumi KAN ◽  
Hirofumi MIYAJIMA ◽  
Shinichi FURUTA ◽  
Hideki SUZUKI ◽  
Takayuki UCHIYAMA ◽  
...  
Keyword(s):  
High Power ◽  
Fiber Lasers ◽  
High Efficiency ◽  
Laser Diodes

scholarly journals Fiber Amplifiers and Fiber Lasers Based on Stimulated Raman Scattering: A Review

Micromachines ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 247 ◽  
Author(s):  
Luigi Sirleto ◽  
Maria Antonietta Ferrara
Keyword(s):  
High Power ◽  
Communication Systems ◽  
Fiber Lasers ◽  
Near Infrared ◽  
High Efficiency ◽  
Stimulated Raman Scattering ◽  
Spectral Band ◽  
High Capacity ◽  
Raman Laser ◽  
Fiber Amplifiers

Nowadays, in fiber optic communications the growing demand in terms of transmission capacity has been fulfilling the entire spectral band of the erbium-doped fiber amplifiers (EDFAs). This dramatic increase in bandwidth rules out the use of EDFAs, leaving fiber Raman amplifiers (FRAs) as the key devices for future amplification requirements. On the other hand, in the field of high-power fiber lasers, a very attractive option is provided by fiber Raman lasers (FRLs), due to their high output power, high efficiency and broad gain bandwidth, covering almost the entire near-infrared region. This paper reviews the challenges, achievements and perspectives of both fiber Raman amplifier and fiber Raman laser. They are enabling technologies for implementation of high-capacity optical communication systems and for the realization of high power fiber lasers, respectively.

New, high efficiency Raman laser architecture for scalable, high power 1.5 micron fiber lasers

2012 ◽  
Author(s):  
V. R. Supradeepa ◽  
J.W. Nicholson ◽  
C.E. Headley ◽  
M. Yan ◽  
B. Palsdottir ◽  
...  
Keyword(s):  
High Power ◽  
Fiber Lasers ◽  
High Efficiency ◽  
Raman Laser

High Power Fiber Lasers

2012 ◽  
Author(s):  
John Ballato ◽  
Martin Richardson ◽  
Michael Bass ◽  
Bryce Samson
Keyword(s):  
High Power ◽  
Fiber Lasers

Progress in high-power high-efficiency VCSEL arrays

2009 ◽  
Author(s):  
Jean-Francois Seurin ◽  
Guoyang Xu ◽  
Viktor Khalfin ◽  
Alexander Miglo ◽  
James D. Wynn ◽  
...  
Keyword(s):  
High Power ◽  
High Efficiency ◽  
Vcsel Arrays

scholarly journals Low Power Cusped Field Thruster Developed for the Space-Borne Gravitational Wave Detection Mission in China

2021 ◽  
Vol 11 (14) ◽  
pp. 6549
Author(s):  
Hui Liu ◽  
Ming Zeng ◽  
Xiang Niu ◽  
Hongyan Huang ◽  
Daren Yu
Keyword(s):  
Low Power ◽  
Gravitational Wave ◽  
Attitude Control ◽  
High Efficiency ◽  
Experimental Investigations ◽  
Attitude Control System ◽  
Gravitational Wave Detection ◽  
Wave Detection ◽  
Wide Range ◽  
Institute Of Technology

The microthruster is the crucial device of the drag-free attitude control system, essential for the space-borne gravitational wave detection mission. The cusped field thruster (also called the High Efficiency Multistage Plasma Thruster) becomes one of the candidate thrusters for the mission due to its low complexity and potential long life over a wide range of thrust. However, the prescribed minimum of thrust and thrust noise are considerable obstacles to downscaling works on cusped field thrusters. This article reviews the development of the low power cusped field thruster at the Harbin Institute of Technology since 2012, including the design of prototypes, experimental investigations and simulation studies. Progress has been made on the downscaling of cusped field thrusters, and a new concept of microwave discharge cusped field thruster has been introduced.

scholarly journals Near-field thermophotovoltaics for efficient heat to electricity conversion at high power density

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Rohith Mittapally ◽  
Byungjun Lee ◽  
Linxiao Zhu ◽  
Amin Reihani ◽  
Ju Won Lim ◽  
...  
Keyword(s):  
Power Density ◽  
High Power ◽  
High Efficiency ◽  
Near Field ◽  
Electrical Power ◽  
Photovoltaic Cells ◽  
High Power Density ◽  
Pv Cell ◽  
Electrical Power Output ◽  
Power Densities

AbstractThermophotovoltaic approaches that take advantage of near-field evanescent modes are being actively explored due to their potential for high-power density and high-efficiency energy conversion. However, progress towards functional near-field thermophotovoltaic devices has been limited by challenges in creating thermally robust planar emitters and photovoltaic cells designed for near-field thermal radiation. Here, we demonstrate record power densities of ~5 kW/m2 at an efficiency of 6.8%, where the efficiency of the system is defined as the ratio of the electrical power output of the PV cell to the radiative heat transfer from the emitter to the PV cell. This was accomplished by developing novel emitter devices that can sustain temperatures as high as 1270 K and positioning them into the near-field (<100 nm) of custom-fabricated InGaAs-based thin film photovoltaic cells. In addition to demonstrating efficient heat-to-electricity conversion at high power density, we report the performance of thermophotovoltaic devices across a range of emitter temperatures (~800 K–1270 K) and gap sizes (70 nm–7 µm). The methods and insights achieved in this work represent a critical step towards understanding the fundamental principles of harvesting thermal energy in the near-field.

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