Compact diode-pumped 598-nm laser source

2002 ◽  
Author(s):  
Joshua Simons ◽  
Helen M. Pask ◽  
Peter Dekker ◽  
James A. Piper
Keyword(s):  
Laser Source ◽  
Diode Pumped

Laser-Based Target Preparation in 3D Integrated Electronic Packages

2009 ◽  
Vol 131 (3) ◽  
Author(s):  
Stefan Martens ◽  
Walter Mack ◽  
Frédéric Courtade ◽  
Philippe Perdu ◽  
Juergen Wilde ◽  
...  
Keyword(s):  
Cross Sections ◽  
Ultrashort Pulse ◽  
Electronic Packaging ◽  
Laser Wavelength ◽  
Laser Source ◽  
Preparation Methods ◽  
Target Preparation ◽  
Molding Compound ◽  
Ultrashort Pulse Lasers ◽  
Diode Pumped

The trend toward 3D integration in electronic packaging requires that failure analysis procedures and target preparation methods are adapted from conventional discrete packages to these emerging packaging technologies. This paper addresses the feasibility of laser-based target preparation in 3D integrated devices, especially stacked-die packages. Various laser technologies such as ultrashort-pulse lasers, excimer lasers, and diode-pumped solid-state (DPSS) lasers with different wavelengths and pulse durations were evaluated. In particular, it was found that ultrashort-pulse lasers with pulse durations in the femtosecond range were not suitable for ablation of the molding compound (MC). Picosecond lasers were applicable with certain constraints. It was found that for MCs with high filler content, DPSS lasers with pulse durations in the nanosecond range were the best choice. For the removal of stacked silicon dies, the laser wavelength was the most important factor in artifact-free thinning. Laser cross sections through several silicon dies with remarkably small heat-affected zones were also demonstrated. The distinct removal of the MC, silicon dies, and metal interconnected with a single laser source offers new opportunities for laser-based target preparation in 3D integrated electronic packaging devices.

Diode-pumped eye-safe laser source exceeding 1% efficiency

1991 ◽  
Vol 16 (21) ◽  
pp. 1680 ◽  
Author(s):  
Larry R. Marshall ◽  
Jeff Kasinski ◽  
Ralph L. Burnham
Keyword(s):  
Laser Source ◽  
Diode Pumped

scholarly journals Thermal analysis and CW laser operation at 1.998 µm in end pumped Tm:YAP lasers

2019 ◽  
Vol 11 (4) ◽  
pp. 103
Author(s):  
Reda M. El-Agmy ◽  
Najm M. Al-Hosiny
Keyword(s):  
Thermal Analysis ◽  
Laser Phys ◽  
Room Temperature ◽  
Blue Laser ◽  
Laser Source ◽  
Laser Operation ◽  
Thermally Induced ◽  
Cw Laser ◽  
High Efficient ◽  
Diode Pumped

We report on thermal analysis and a continuous wave (CW) laser operation at (1.998µm) of end pumped Tm: YAP cylindrical laser rod. The Tm: YAP laser rod is pumped at a wavelength of 1.064 µm emitting from Nd: YAG laser source. A 3W incident pump power is used to generate a maximum laser output of 700 mW, representing 18% slope efficiency. The power of thermally induced lens in Tm:YAP laser rod is numerically analyzed and validated experimentally. The focal lengths of the thermally induced lens are directly measured using Shack-Hartmann wavefront sensor. We have detected blue up-conversion fluorescence emission before laser operation at 1.998 µm. The obtained experimental results were in good agreement with the numerical calculations. Full Text: PDF ReferencesI. F. Elder, J. Payne, "Diode-pumped, room-temperature Tm:YAP laser", Applied Optics 36 (33), 8606 (1997) CrossRef Y. Li, B. Yao, Y. Wang, Y. Ju, G. Zhao, Y. Zong, J. Xu, "High efficient diode-pumped Tm:YAP laser at room temperature", Chinese Opt. Lett. 5 (5), 286 (2007). DirectLink H. Ni, S. C. Rand, "Avalanche upconversion in Tm:YALO3", Opt. Lett. 16 (8), 1424 (1991). CrossRef Z. G. Wang, C. W. Song, Y. F. Li, Y. L. Ju, Y. Z. Wang, "CW and pulsed operation of a diode-end-pumped Tm:GdVO4 laser at room temperature", Laser Phys. Lett. 6 (2), 105 (2009). CrossRef Baoquan Yao, Yi Tian, Wei Wang, Gang Li, Yuezhu Wang, "Analysis and compensation of thermal lens effects in Tm:YAP lasers", Chinese Opt. Lett. 8 (10), 996 (2010). CrossRef F. Cornacchia, D. Parisi, C. Bernardini, M. Toncelli, "Efficient, diode-pumped Tm3+:BaY2F8 vibronic laser", Opt. Expr. 12 (9), 1982 (2004). CrossRef Xiaojin Cheng, Mi Fan, Jiandong Cao, Jianhua Shang, "Research on the thermal effect and laser resonator of diode-pumped thin-slab Tm:YAP lasers", Optik 176, 32 (2019). CrossRef W. Koechner, Solid-state Laser Engineering, Springer, (2013). DirectLink https://www.crytur.cz DirectLink http://www.laserlabcomponents.com/ DirectLink R. M. El-Agmy, N.AlHosiny, "2.31 [micro sign]m laser under up-conversion pumping at 1.064 [micro sign]m in Tm3+:ZBLAN fibre lasers", Elect. Lett. 46 (13), 936 (2010). CrossRef R. M. El-Agmy, N. M. Al-Hosiny, "870 mW blue laser emission at 480 nm in a large core thulium doped ZBLAN fiber laser", Laser Phys. 20 (4), 838 (2010). CrossRef R. M. El-Agmy, N. M. Al-Hosiny, "Power scaling of end-pumped Nd:YLF lasers, modeling and experiments", Optik 140, 584 (2017). CrossRef R. M. El-Agmy, N. Al-Hosiny, "Thermal analysis and experimental study of end-pumped Nd: YLF laser at 1053 nm", Photonic sensors 7 (4), 329 (2017). CrossRef S. C. Tidwell, J. F. Seamans, M. S. Bowers, A. K. Cousins, "Scaling CW diode-end-pumped Nd:YAG lasers to high average powers", IEEE J. Quantum Electron. 28, 997 (1992). CrossRef P. J. Hardman, W. A. Clarkson, G. J. Friel, M. Pollnau, D. C. Hanna, "Energy-transfer upconversion and thermal lensing in high-power end-pumped Nd:YLF laser crystals", IEEE Journal of Quantum Electronics 35, 647 (1999). CrossRef

scholarly journals Broadly tunable femtosecond pulses around 206 µm from a diode-pumped Tm3+-doped solid-state laser source

2019 ◽  
Vol 27 (8) ◽  
pp. 11103 ◽  
Author(s):  
N. K. Stevenson ◽  
C. T. A. Brown ◽  
J. M. Hopkins ◽  
M. D. Dawson ◽  
A. A. Lagatsky
Keyword(s):  
Solid State ◽  
Solid State Laser ◽  
Laser Source ◽  
Femtosecond Pulses ◽  
State Laser ◽  
Diode Pumped

Increasing the Format-Flexibility of Packaging Machines: Experimental Study on Laser Beam Sealing and Cutting

2016 ◽  
Vol 856 ◽  
pp. 201-208 ◽  
Author(s):  
Georg Götz ◽  
Johannes Fink ◽  
Christoph Richter ◽  
Gunther Reinhart
Keyword(s):  
Experimental Study ◽  
Energy Efficiency ◽  
Experimental Investigation ◽  
Laser Beam ◽  
Fiber Laser ◽  
Laser Source ◽  
Processing Technologies ◽  
Diode Pumped ◽  
Thulium Fiber Laser ◽  
Processing Device

The improvements of the format-flexibility as well as the resource and energy efficiency are important for the users and manufacturers of packaging machines. There is a positive interconnection of resource and energy efficiency with format-flexibility because e.g. the reduction of stand-by phases. To reach these goals, it is necessary to reduce the downtime and to increase the overall equipment effectiveness (OEE). The application of laser beam based processing technologies is very common in many different branches, e.g. automotive. One big advantage of the laser beam as a working tool is the high inherent flexibility. Different contours could be sealed and cut without any changeover by the use of flexible motion systems, e.g. deflection units or robots. However, there is a lack of use of laser based technologies in packaging machines. The focus of this paper is the experimental investigation of laser beam sealing and cutting with the same laser source. For this a 2 μm diode-pumped thulium fiber laser is used. Furthermore a flexible processing device will be shown and the practical use will be demonstrated.

scholarly journals Experimental evaluation of temperature distribution of a vapor cell using a Hilbert transform procedure

2016 ◽  
Vol 4 ◽  
Author(s):  
He Cai ◽  
You Wang ◽  
Ming Gao ◽  
Wei Zhang ◽  
Zhigang Jiang ◽  
...  
Keyword(s):  
Temperature Distribution ◽  
Hilbert Transform ◽  
Laser Medium ◽  
Laser Source ◽  
Number Density ◽  
Vapor Laser ◽  
Vapor Cell ◽  
A Cell ◽  
Diode Pumped ◽  
Output Characteristics

A diode-pumped alkali vapor laser (DPAL) is one of the most promising candidates of the next-generation high-powered laser source. As the saturated number density of alkali vapor is highly dependent on the temperature inside a vapor cell, the temperature distribution in the cross-section of a cell will greatly affect the homogeneity of a laser medium and the output characteristics of a DPAL. In this paper, we developed an algorithm based on the regime concluding quasi-Hilbert transform to evaluate the phase aberration of a wavefront when the probe beam passes through the vapor cell placed in one arm of a Mach–Zehnder interference setup. According to the theoretical algorithm, we deduced the temperature distribution of a cesium vapor cell for different heating conditions. The study is thought to be useful for development of a high-powered laser.

scholarly journals Pulsed high-repetition rate diode-pumped Nd:YAG laser source with advanced ring Q-switch modulator

2021 ◽  
Vol 3 ◽  
pp. 100077
Author(s):  
Maxim Bogdanovich ◽  
Alexandr Grigor'ev ◽  
Valerii Dudikov ◽  
Andrew Kot ◽  
Andrew Ryabtsev ◽  
...  
Keyword(s):  
Nd:Yag Laser ◽  
Repetition Rate ◽  
High Repetition Rate ◽  
Laser Source ◽  
High Repetition ◽  
Diode Pumped ◽  
Diode Pumped Nd:Yag Laser
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