THERMAL SCIENCE

International Scientific Journal

Mamdouh El Haj Assad

,

Ehab Bani Han

,

Israa Al-Sawafta

,

Ahmad Sedaghat

,

M. Alshabi

,

Shek Rahman

THERMAL ANALYSIS OF END PUMPED FIBER LASERS SUBJECTED TO JACKET FLUID COOLING

ABSTRACT
End pumped lasers are highly efficient lasers particularly in diode lasers using micro lenses. The common cooling method for end-pumped systems is using water jacket or copper tube surrounding the laser rod. In this paper, the temperature distribution within a water jacket and a fiber laser end pumped by a top hat beam is studied analytically. The temperature distribution is obtained by considering the radial heat convection with fully developed laminar flow neglecting the axial heat conduction. The effect of laser dimensions and the Brinkman number on the temperature distribution are presented. The results indicate that the temperature distribution is strongly dependent on the Brinkman number. The results are presented in dimensionless form so that they can be applied to any end-pumped laser rod and fluid types. The main output of this work is that it is better for cooling purposes to have low Br values.
KEYWORDS
fiber laser, thermal distribution, fluid coolant, convection, heat transfe, laser rod, cooling, temperature distribution
PAPER SUBMITTED: 2019-04-07
PAPER REVISED: 2019-07-01
PAPER ACCEPTED: 2019-07-07
PUBLISHED ONLINE: 2019-08-10
DOI REFERENCE: https://doi.org/10.2298/TSCI190407311E
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2021, VOLUME 25, ISSUE Issue 2, PAGES [1023 - 1031]
REFERENCES
  1. Aldelaimi, A. A. K., et al., Using of Diode Laser (940 nm) in Orofacial Region, Journal of Research in Medical and Dental Science, 5 (2017), 5, 34
  2. Rodrigues, G. C., et al., Considerations on Assist Gas Jet Optimization in Laser Cutting with Direct Diode Laser, Procedia Engineering, 183 (2017), Dec., pp. 37-44
  3. Rodrigues, G. C., et al., Theoretical and Experimental Aspects of Laser Cutting with a Direct Diode Laser, Optics and Lasers in Engineering, 61 (2014), Oct., pp. 31-38
  4. Rodrigues, C. G, Duflou, J. R., Into Polarization Control in Laser Cutting with Direct Diode Lasers, Journal of Laser Applications, 28 (2016), 2, 022207
  5. Bachmann, F., et al., High Power Diode Lasers: Technology and Applications, Springer, New York, USA, 2007, Vol. 128
  6. Knight, P. L, M. A., Diod Laser Arrays, Cambridge University Press, Cambridge, UK, p. 464
  7. Ashoori, V., et al., Heat Generation and Removal in Soild State Lasers, in: An Overview of Heat Transfer Phenomena, (ed. Salim N. Kazi), InTech Open, Rijeka, Croatia, 2012, pp. 343-344
  8. He, G., et al., Generation of Radially Polarized Beams Based on Thermal Analysis of a Working Cavity, Optics Express, 19 (2011), 19, pp. 18302-18309
  9. He, W.-J., et al., Diode-Pumped Efficient Tm, Ho: GdVO 4 Laser with Near-Diffraction Limited Beam Quality, Optics Express, 14 (2006), 24, pp. 11653-11659
  10. Zhu, X., Peyghambarian, N., High-Power ZBLAN Glass Fiber Lasers: Review and Prospect, Advances in OptoElectronics, 2010 (2010), ID 501956
  11. Jeong, Y.-C., et al., Multi-Kilowatt Single-Mode Ytterbium-Doped Large-Core Fiber Laser, Journal of the Optical Society of Korea, 13 (2009), 4, pp. 416-422
  12. Ahmed, M. A., et al., High-Power Radially Polarized Yb: YAG Thin-Disk Laser with High Efficiency, Optics Express, 19 (2011), 6, pp. 5093-5103
  13. Beil, K., et al., Thermal and Laser Properties of Yb: LuAG for kW Thin Disk Lasers, Optics Express, 18 (2010), 20, pp. 20712-20722
  14. Dascalu, T., Taira, T., Highly Efficient Pumping Configuration for Microchip Solid-State Laser, Optics Express, 14 (2006), 2, pp. 670-677
  15. Bhandari, R., Taira, T., Megawatt Level UV Output from
  16. Cr 4+: YAG Passively Q-switched Microchip Laser, Optics Express, 19 (2011), 23, pp. 22510-22514
  17. Innocenzi, M., et al., Thermal Modelling of Continuous‐Wave End‐Pumped Solid‐State Lasers, Applied Physics Letters, 56 (1990), 19, pp. 1831-1833
  18. Brown, D. C., Hoffman, H. J., Thermal, Stress, and Thermo-Optic Effects in High Average Power Double-Clad Silica Fiber Lasers, IEEE Journal of Quantum Electronics, 37 (2001), 2, pp. 207-217
  19. Shi, P., et al., Semianalytical Thermal Analysis of the Heat Capacity of YAG Laser Rods, Applied Optics, 48 (2009), 35, pp. 6701-6707
  20. Shi, P., et al., Semianalytical Thermal Analysis on a Nd: YVO 4 Crystal, Applied Optics, 46 (2007), 19, pp. 4046-4051
  21. Shi, P., et al., Semianalytical Thermal Analysis of tThermal Focal Length on Nd: YAG Rods, Applied Optics, 46 (2007), 26, pp. 6655-6661
  22. Zhu, X., Jain, R., The 10-W-level Diode-Pumped Compact 2.78 μm ZBLAN Fiber Laser, Optics Letters, 32 (2007), 1, pp. 26-28
  23. Tokita, S., et al., Liquid-Cooled 24 W Mid-Infrared Er: ZBLAN Fiber Laser, Optics Letters, 34 (2009), 20, pp. 3062-3064
  24. Sangla, D., et al., High Power Laser Operation with Crystal Fibers, Applied Physics B, 97 (2009), 2, 263
  25. Liu, T., et al., The 3-Dimensional Heat Analysis in Short-Length Er 3+/Yb 3+ co-Doped Phosphate Fiber Laser with Upconversion, Optics Express, 17 (2009), 1, pp. 235-247
  26. Pfistner, C., et al., Thermal Beam Distortions in End-Pumped Nd: YAG, Nd: GSGG, and Nd: YLF Rods, IEEE Journal of Quantum Electronics, 30 (1994), 7, pp. 1605-1615
  27. Li, L., et al., The 3-Dimensional Thermal Analysis and Active Cooling of Short-Length High-Power Fiber Lasers, Optics Express, 13 (2005), 9, pp. 3420-3428
  28. Ashoori, V., Malakzadeh, A., Explicit Exact 3-D Analytical Temperature Distribution in Passively and Actively Cooled High-Power Fibre Lasers, Journal of Physics D: Applied Physics, 44 (2011), 35, 355103
  29. Shibib, K. S., et al., Thermal and Stress Analysis in Nd: Yag Laser Rod with Different Double end Pumping Methods, Thermal Science, 15 (2011), Suppl. 2, pp. S399-S407
  30. Shibib, K. S., et al., Analytical Treatment of Transient Temperature and Thermal Stress Distribution in Cw-End-Pumped Laser Rod: Thermal Response Optimization Study, Thermal Science, 18 (2014), 2, pp. 399-408
  31. Shibib, K. S., et al., Transient Analytical Solution of Temperature Distribution and Fracture Limits in Pulsed Solid State Laser Rod, Thermal Science, 21 (2017), 3, pp. 1213-1222
  32. Assad, M. E. H., Brown, D. C., Thermodynamic Analysis of End-Pumped Fiber Lasers Subjected to Surface Cooling, IEEE Journal of Quantum Electronics, 49 (2013), 1, pp. 100-107
  33. Jiang, H. J., et al., The 3-D Transient Thermodynamic Analysis of Laser Surface Treatment for a Fiber Laminated Plate with a Coating Layer, International Journal of Heat and Mass Transfer, 118 (2018), Mar., pp. 671-685
  34. Jiang, H. J., et al., An Analytical Solution of 3-D Steady Thermodynamic Analysis for a Piezoelectric Laminated Plate Using Refined Plate Theory, Composite Structures, 162 (2017), Feb., pp. 194-209
  35. Jiang, H. J., et al., The 3-D Steady Thermodynamic Analysis for a Double-Layer Plate with a Local Heat Source and Harmonic Load, Applied Thermal Engineering, 106 (2016), Aug., pp. 161-173
  36. Assad, M. E. H., Effect of Maximum and Minimum Heat Capacity Rate on Entropy Generation in a Heat Exchanger. International Journal of Energy Research, 34 (2010), 14, pp. 1302-1308
  37. Assad, M. E. H., Entropy Generation Analysis in a Slab with Non-Uniform Heat Generation Subjected to Convection Cooling, International Journal of Exergy, 9 (2011), 3, pp. 355-369
  38. Assad, M. E. H., Study of Entropy Generation in a Slab with Non-Uniform Internal Heat Generation, Thermal Science, 17 (2013), 3, pp. 943-950
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Thermal analysis of end pumped fiber lasers subjected to jacket fluid cooling

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