Near field analysis of CSG and BSG combined element under high power laser condition

2006 ◽  
Author(s):  
Xin Yao ◽  
Fuhua Gao ◽  
Yixiao Zhang ◽  
Lei Wang ◽  
Yongkang Guo ◽  
...  
Keyword(s):  
High Power ◽  
Near Field ◽  
Field Analysis ◽  
High Power Laser ◽  
Power Laser ◽  
Laser Condition

Near-field diffraction analysis of color-separating gratings under high-power laser condition

2005 ◽  
Author(s):  
Fuhua Gao ◽  
Xionggui Tang ◽  
Shenglin Wen ◽  
Jinglei Du ◽  
Yongkang Guo ◽  
...  
Keyword(s):  
Diffraction Analysis ◽  
High Power ◽  
Near Field ◽  
High Power Laser ◽  
Power Laser ◽  
Laser Condition

Identifying Defects in Thin Film of High Power Laser Lens by Using Near Field Microimaging Method

2017 ◽  
Vol 44 (1) ◽  
pp. 0103001
Author(s):  
白忠臣 Bai Zhongchen ◽  
黄兆岭 Huang Zhaoling ◽  
郝礼才 Hao Licai ◽  
陆安江 Lu Anjiang ◽  
秦水介 Qin Shuijie
Keyword(s):  
Thin Film ◽  
High Power ◽  
Near Field ◽  
High Power Laser ◽  
Power Laser

Improving near field of high-power laser beams

2011 ◽  
Vol 23 (4) ◽  
pp. 959-962
Author(s):  
谢娜 Xie Na ◽  
黄晚晴 Huang Wanqing ◽  
郭仪 Guo Yi ◽  
王晓东 Wang Xiaodong ◽  
方香云 Fang Xiangyun ◽  
...  
Keyword(s):  
High Power ◽  
Near Field ◽  
Laser Beams ◽  
High Power Laser ◽  
Power Laser

Die Bonding of High Power 808 nm Laser Diodes With Nanosilver Paste

2012 ◽  
Vol 134 (4) ◽  
Author(s):  
Yi Yan ◽  
Xu Chen ◽  
Xingsheng Liu ◽  
Yunhui Mei ◽  
Guo-Quan Lu
Keyword(s):  
Semiconductor Laser ◽  
High Power ◽  
Near Field ◽  
Laser Diodes ◽  
Acoustic Microscopy ◽  
High Power Laser ◽  
Power Laser ◽  
Power Semiconductor ◽  
Die Bonding ◽  
Nanosilver Paste

Conduction-cooled high power laser diodes have a variety of significant commercial, industrial, and military applications. For these devices to perform effectively, an appropriate die-attached material meeting specific requirements must be selected. In this study, nanosilver paste, a novel die-attached material, was used in packaging the 60 W 808 nm high power laser diodes. The properties of the laser diodes operating in the continuous wave (CW) mode, including the characteristics of power–current–voltage (LIV), spectrum, near field, far field, near field linearity, spatial spectrum, and thermal impedance, were determined. In addition, destructive tests, including the die shear test, scanning acoustic microscopy, and the thermal rollover test, were conducted to evaluate the reliability of the die bonding of the 60 W 808 nm high power semiconductor laser with nanosilver paste. Thermal analyses of the laser diodes operating at CW mode with different die-attached materials, indium solder, gold–tin solder and nanosilver paste, were conducted by finite element analysis (FEA). According to the result of the FEA, the nanosilver paste resulted in the lowest temperature in the laser diodes. The test results showed that the nanosilver paste was a very promising die-attached material in packaging high power semiconductor laser.

Calculated Methods of High Power Laser Near Field Parameters

2008 ◽  
Vol 35 (4) ◽  
pp. 544-548 ◽  
Author(s):  
孙志红 Sun Zhihong ◽  
彭志涛 Peng Zhitao ◽  
刘华 Liu Hua ◽  
徐隆波 Xu Longbo ◽  
赵军普 Zhao Junpu ◽  
...  
Keyword(s):  
High Power ◽  
Near Field ◽  
High Power Laser ◽  
Power Laser

Analysis of Near-Field Modulations Caused by Defects in High Power Laser System

2016 ◽  
Vol 43 (3) ◽  
pp. 0302002 ◽  
Author(s):  
尤科伟 You Kewei ◽  
张艳丽 Zhang Yanli ◽  
张雪洁 Zhang Xuejie ◽  
张军勇 Zhang Junyong ◽  
朱健强 Zhu Jianqiang
Keyword(s):  
High Power ◽  
Near Field ◽  
Laser System ◽  
High Power Laser ◽  
Power Laser ◽  
High Power Laser System

Improvement of near-field beam quality for high-power laser pulses by a two-photon-absorption organic compound

Optik ◽  
2013 ◽  
Vol 124 (1) ◽  
pp. 60-63 ◽  
Author(s):  
Na Xie ◽  
Yi Guo ◽  
Wanqing Huang ◽  
Xiaodong Wang ◽  
Runchang Zhao ◽  
...  
Keyword(s):  
Organic Compound ◽  
High Power ◽  
Beam Quality ◽  
Near Field ◽  
Laser Pulses ◽  
Photon Absorption ◽  
High Power Laser ◽  
Power Laser ◽  
Two Photon Absorption ◽  
Two Photon

scholarly journals Analysis on FM-to-AM conversion of SSD beam induced by etalon effect in a high-power laser system

2019 ◽  
Vol 7 ◽  
Author(s):  
Ping Li ◽  
Wei Wang ◽  
Jingqin Su ◽  
Xiaofeng Wei
Keyword(s):  
High Power ◽  
Shape Control ◽  
Order Approximation ◽  
Near Field ◽  
Laser System ◽  
General Situation ◽  
High Power Laser ◽  
Power Laser ◽  
Laser Target ◽  
Etalon Effect

FM-to-AM (frequency modulation-to-amplitude modulation) conversion caused by nonuniform spectral transmission of broadband beam is harmful to high-power laser facility. Smoothing by spectral dispersion (SSD) beam is a special broadband beam for its monochromatic feature at the given time and space on the near field. The traditional method which uses the optical spectral transfer function as filters cannot accurately describe its AM characteristics. This paper presents the theoretical analysis of the etalon effect for SSD beam. With a low-order approximation, the analytic model of the temporal shape of SSD beam is obtained for the first time, which gives the detailed AM characteristics at local and integral aspects, such as the variation of ripples width and amplitude in general situation. We also analyze the FM-to-AM conversion on the focal plane; in the focusing process, the lens simply acts as an integrator to smooth the AM of SSD beam. Because AM control is necessary for the near field to avoid optics damage and for the far field to ensure an optimal interaction of laser–target, our investigations could provide some important phenomena and rules for pulse shape control.

scholarly journals High-quality near-field beam achieved in a high-power laser based on SLM adaptive beam-shaping system

2015 ◽  
Vol 23 (2) ◽  
pp. 681 ◽  
Author(s):  
Sensen Li ◽  
Yulei Wang ◽  
Zhiwei Lu ◽  
Lei Ding ◽  
Pengyuan Du ◽  
...  
Keyword(s):  
High Power ◽  
Near Field ◽  
Beam Shaping ◽  
High Power Laser ◽  
Power Laser ◽  
High Quality ◽  
Shaping System
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