Welding performance of a 2kW continuous wave supermodulated Nd:YAG laser-increased weld speed, weld penetration and reduced porosity with supermodulated output power

2008 ◽  
Author(s):  
Mohammed Naeem ◽  
Richard Jessett ◽  
John Chinn
Keyword(s):  
Output Power ◽  
Nd:Yag Laser ◽  
Continuous Wave ◽  
Weld Penetration

Study on pump pulse characteristics of QCW diode-side-pumped Nd:YAG laser

2021 ◽  
Author(s):  
Zexin Song ◽  
Qi Bian ◽  
Yu Shen ◽  
Keling Gong ◽  
Nan Zong ◽  
...  
Keyword(s):  
Pulse Duration ◽  
Output Power ◽  
Pump Pulse ◽  
Nd:Yag Laser ◽  
Continuous Wave ◽  
Focal Length ◽  
Equation Model ◽  
Average Output ◽  
Pulse Characteristics ◽  
Thermal Focal Length

Abstract The influence of pumping laser pulse on the property of quasi-continuous-wave diode-side-pumped Nd:YAG laser is investigated theoretically and experimentally here. Under remaining a fixed duty cycle, the average output power increases, and the corresponding thermal focal length shorten with the increase of the pump pulse duration, which attributes to the decrease of the ratio of pulse buildup time to the pulse duration. At a pump power of 146 W, the laser output power changes from 65.1 W to 81.2 W when the pulse duration is adjusted from 150 μs to 1000 μs, confirming a significant enhancement of 24.7%. A laser rate equation model incorporating the amplified spontaneous emission is also utilized and numerically solved, and the simulated results agree well with the experimental data.

Equivalent Pulsed GMA Power to 2 kW CW Nd:YAG Laser Power in Welding of Carbon Steel and Al Alloy

2008 ◽  
Vol 580-582 ◽  
pp. 463-466
Author(s):  
Guo Liang Qin ◽  
Xu You Wang ◽  
Shang Yang Lin
Keyword(s):  
Carbon Steel ◽  
Welding Speed ◽  
Nd:Yag Laser ◽  
Heat Input ◽  
Laser Power ◽  
Continuous Wave ◽  
Low Carbon Steel ◽  
Al Alloy ◽  
Weld Penetration ◽  
Low Carbon

Based on the bead on plate test and the effects of heat input on weld penetration, the equivalence between 2 kW CW (Continuous Wave) Nd:YAG laser power and pulsed GMA(Gas Metal Arc) power and the effect of welding speed on their equivalent ratios in welding carbon steel and Al alloy were studied. The studied results show that 9.8 kW pulsed GMA power is needed to reach the same weld penetration depth with 2 kW CW Nd:YAG laser power for welding of low carbon steel at v=1.2 m/min; for Al alloy, it is 3.92 kW pulsed GMA power. The equivalent ratios of 2 kW Nd:YAG laser power and pulsed GMA power are 4.9~6.4 and 1.85~2.1 times at different welding speed for low carbon steel and Al alloy, respectively. But their equivalent ratios have different variations with welding speed; at which the equivalent ratio of low carbon steel increases with welding speed and that of Al alloy decreases. The studied results offer the experimental boundary of heat input for analyzing the effect of Nd:YAG laser power and pulsed GMA power on laser+pulsed GMA hybrid welding process.

15 mW of continuous wave single transverse mode output power from planar 960 nm bottom-emitting VCSELs with multiple tapered oxide layers

2010 ◽  
Author(s):  
James A. Lott ◽  
Nikolai A. Maleev ◽  
Alexander G. Kuzmenkov ◽  
Marina M. Kulagina ◽  
Yuriy M. Zadiranov ◽  
...  
Keyword(s):  
Output Power ◽  
Continuous Wave ◽  
Transverse Mode ◽  
Oxide Layers

scholarly journals Ytterbium-doped large-core fiber laser with 1.36 kW continuous-wave output power

2004 ◽  
Vol 12 (25) ◽  
pp. 6088 ◽  
Author(s):  
Y. Jeong ◽  
J. K. Sahu ◽  
D. N. Payne ◽  
J. Nilsson
Keyword(s):  
Fiber Laser ◽  
Output Power ◽  
Continuous Wave ◽  
Large Core ◽  
Continuous Wave Output Power ◽  
Core Fiber

Laser Sclerostomy ab interno Using a Continuous Wave Nd:YAG Laser

1989 ◽  
Vol 20 (8) ◽  
pp. 552-556 ◽  
Author(s):  
Jonathan C Javitt ◽  
Stefan S O'Connor ◽  
Richard P Wilson ◽  
Jay L Federman
Keyword(s):  
Nd:Yag Laser ◽  
Continuous Wave ◽  
Laser Sclerostomy ◽  
Ab Interno
Sign in / Sign up

Export Citation Format

Share Document