scholarly journals Research on fiber coupling technology of kilowatt laser diode by single emitters

2018 ◽  
Vol 189 ◽  
pp. 11008 ◽  
Author(s):  
Wenbin Qin ◽  
Jing Li ◽  
Lei Yao ◽  
Youqiang Liu ◽  
Yuntao Qiu ◽  
...  
Keyword(s):  
Diode Laser ◽  
Coupling Efficiency ◽  
Processing System ◽  
Spot Size ◽  
Theoretical Research ◽  
Fiber Coupling ◽  
Output Laser Power ◽  
Fiber Taper ◽  
Output Laser ◽  
Focus Spot Size

This paper proposes a program that combine the laser of single-emitters by using fiber combiner, what’s more, we designed and developed a multiple single emitters diode laser module of full optical fiber. We used ZEMAX software to simulate and optimize the influence of fiber coupling efficiency by the location of cylindrical lens and fiber, finally, we developed 8W fiber coupling single emitter diode laser, the wavelength is 915nm, fiber diameter is 105/125μm, NA0.15. This article also carried on the theoretical research of N×1 fiber combiner, and based on Vytran GPX glass processing system, we fabricated the 19×1fiber combiner by TFB technique, combined 19 105/122μm, NA0.15 fibers to a 400/440μm, NA0.22 fiber, has realized 150W laser output, with fiber combining efficiency more than 96%. In the end, 8*400um fibers are synthesized through a fiber taper. The output laser power after fiber taper reached 1453W, with the focus spot size is 2.25mm*1.1mm and power density reached 6×104W/cm2.

scholarly journals Modeling of three-dimensional exciplex pumped fluid Cs vapor laser with transverse and longitudinal gas flow

2021 ◽  
Vol 9 ◽  
Author(s):  
Chenyi Su ◽  
Xingqi Xu ◽  
Jinghua Huang ◽  
Bailiang Pan
Keyword(s):  
Wall Temperature ◽  
Laser Power ◽  
Gas Flow ◽  
Particle Density ◽  
Fluid Velocity ◽  
Three Dimensional ◽  
Heat Accumulation ◽  
Vapor Laser ◽  
Output Laser Power ◽  
Output Laser

Abstract Considering the thermodynamical fluid mechanics in the gain medium and laser kinetic processes, a three-dimensional theoretical model of an exciplex-pumped Cs vapor laser with longitudinal and transverse gas flow is established. The slope efficiency of laser calculated by the model shows good agreement with the experimental data. The comprehensive three-dimensional distribution of temperature and particle density of Cs is depicted. The influence of pump intensity, wall temperature, and fluid velocity on the laser output performance is also simulated and analyzed in detail, suggesting that a higher wall temperature can guarantee a higher output laser power while causing a more significant heat accumulation in the cell. Compared with longitudinal gas flow, the transverse flow can improve the output laser power by effectively removing the generated heat accumulation and alleviating the temperature gradient in the cell.

Experimental optimization of the fiber coupling efficiency of GaAs quantum dot-based photon sources

2021 ◽  
Vol 119 (24) ◽  
pp. 244003
Author(s):  
Weijie Nie ◽  
Nand Lal Sharma ◽  
Carmen Weigelt ◽  
Robert Keil ◽  
Jingzhong Yang ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Coupling Efficiency ◽  
Experimental Optimization ◽  
Fiber Coupling ◽  
Photon Sources ◽  
Gaas Quantum Dot

Pointing errors effect on fiber coupling efficiency for Gaussian-beam wave through atmospheric turbulence channel in FSO links

2019 ◽  
Vol 435 ◽  
pp. 183-189 ◽  
Author(s):  
Gaoyuan Lu ◽  
Jing Ma ◽  
Chao Zhai ◽  
Siyuan Yu ◽  
Liying Tan ◽  
...  
Keyword(s):  
Gaussian Beam ◽  
Atmospheric Turbulence ◽  
Coupling Efficiency ◽  
Beam Wave ◽  
Fiber Coupling ◽  
Pointing Errors

High-coupling-efficiency laser diodes integrated with spot-size converters fabricated on 2 inch InP substrates

1995 ◽  
Vol 31 (24) ◽  
pp. 2102-2104 ◽  
Author(s):  
M. Wada ◽  
K. Kishi ◽  
K. Kawano ◽  
Y. Noguchi ◽  
Y. Kadota ◽  
...  
Keyword(s):  
Laser Diodes ◽  
Coupling Efficiency ◽  
Spot Size ◽  
Inp Substrates

Theoretical research on the effects of third-order dispersion on multi-pulse signal propagation based on Runge–Kutta algorithm

2021 ◽  
pp. 2150234
Author(s):  
Shenwei Yin ◽  
Haichen Rong ◽  
Jiayuan Dong ◽  
Xin Li ◽  
Yichen Yan ◽  
...  
Keyword(s):  
Signal Processing ◽  
Processing System ◽  
Pulse Signal ◽  
Signal Propagation ◽  
Theoretical Research ◽  
Third Order ◽  
Signal Processing System ◽  
Third Order Dispersion ◽  
Runge Kutta ◽  
Order Dispersion

In recent years, integrated signal processing system has been attracting increasing attention for its significant potential in future data transmission and information interaction. There is a key technical requirement for multi-pulse signal propagation that keeps the waveform shape, which contributes to the practical value of the system. Here, we investigate the effects of third-order dispersion on pulses in mid-infrared multi-pulse signal propagation via numerical simulation based on Runge–Kutta algorithm. The phenomenon of waveform distortion and reduction of conversion efficiency induced by third-order dispersion is explored and discussed in detail. To reduce the impact of nonlinear factors, we propose an on-chip signal processing system based on a lithium niobate waveguide, which achieves high-efficiency signal transmission. It opens a new way to establish a novel transmission system to process multi-pulse signal.

Study on Coupling of Step and Graded Index Single Mode Optical Fiber Considering the Transverse Misalignment

2020 ◽  
Vol 8 (2) ◽  
pp. 78-82
Author(s):  
Prosenjit Roy Chowdhury ◽  
◽  
Keyword(s):  
Optical Fiber ◽  
Communication Systems ◽  
Structural Parameters ◽  
Fractional Power ◽  
Single Mode ◽  
Spot Size ◽  
Fiber Coupling ◽  
Fundamental Parameters ◽  
Graded Index ◽  
Wide Range

"Advance design and day to day up-gradation of communication system is the requirement of international telecommunication. The optical communication systems involve the effective fiber coupling or splicing to meet the need of long communication channel. When the studies on both the intensive and extensive properties of optical fiber are exploring new research horizons, the effectiveness of such systems can be calibrated with transmission parameters like transmitted fractional power, which is a function of ‘spot size’ as well. Our study of fiber junctions based on fundamental parameters like wavelength, fiber profile index etc. has touched some unrevealed areas and explored some interesting results. The profile index of optical fiber has received less attention compared to other structural parameters of optical fiber but our study at important wavelengths for different profiles has shown that the less-used fiber profiles has some interesting premier outcomes, which can introduce some significant impact on optical fiber based system design and engineering. We have observed almost frequency or wavelength independent transmitted fractional power around the most used 1.55 micrometer wavelengths at some rarely used fiber profile index. Our study predicts the best and worst fiber profiles for transmitted fractional power (T ), at the same time, we have observed the fiber profile index independent region for a band of ‘T’ values. The reporting and its approach are found to be premier in this field. So, our work is reporting a comparison of effective fiber-to-fiber coupling, based on fiber profile index of different fibers. It is also giving a clear view of the wavelength dependency of effective fiber coupling for different fibers having wide range of graded fiber profiles."

Development of Semiconductor Direct Output Laser Processing System and Research of Temperature Control Strategy

Applied laser ◽  
2015 ◽  
Vol 35 (1) ◽  
pp. 115-123
Author(s):  
徐元飞 Xu Yuanfei ◽  
胡晓冬 Hu Xiaodong ◽  
姚建华 Yao Jianhua ◽  
Volodymyr Kovalenko Volodymyr Kovalenko
Keyword(s):  
Temperature Control ◽  
Control Strategy ◽  
Laser Processing ◽  
Processing System ◽  
Output Laser
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