DOI QR코드

DOI QR Code

Optimization of a Passively Q-switched Yb:YAG Laser Ignitor Pumped by a Laser Diode with Low Power and Long Pulse Width

  • Kim, Jisoo (Department of Photonic Engineering, Chosun University) ;
  • Moon, Soomin (Department of Photonic Engineering, Chosun University) ;
  • Park, Youngin (Department of Photonic Engineering, Chosun University) ;
  • Kim, Hyun Su (Department of Photonic Engineering, Chosun University)
  • Received : 2019.10.23
  • Accepted : 2020.01.16
  • Published : 2020.04.25

Abstract

We successfully constructed a passively Q-switched Yb:YAG laser ignitor pumped by a diode laser with low power and long pulse width. To the best of our knowledge, this is the first study to achieve a quasi-MW output power from an optimized Q-switch Yb:YAG laser ignitor by using a pumping diode laser module emitting at under a power of 23 W. The output pulse energy of our optimized laser is 0.98 mJ enclosed in a 1.06 ns pulse width, corresponding to a peak power of 0.92 MW.

Acknowledgement

Supported by : Korea Institute of Energy Technology Evaluation and Planning (KETEP), Ministry of Trade, Industry & Energy (MOTIE)

References

  1. N. Pavel, M. Barwinkel, P. Heinz, D. Bruggemann, G. Dearden, G. Croitoru, and O. V. Grigore, "Laser ignition - Spark plug development and application in reciprocating engines," Prog. Quantum Electron. 58, 1-32 (2018). https://doi.org/10.1016/j.pquantelec.2018.04.001
  2. M. Tsunekane, T. Inohara, A. Ando, N. Kido, K. Kanehara, and T. Taira, "High peak power, passively Q-switched microlaser for ignition of engines," IEEE J. Quantum Electron. 46, 277-284 (2010). https://doi.org/10.1109/JQE.2009.2030967
  3. T. X. Phuoc, "Laser-induced spark ignition fundamental and applications," Opt. Lasers Eng. 44, 351-397 (2006). https://doi.org/10.1016/j.optlaseng.2005.03.008
  4. T. Taira, S. Morishima, K. Kanehara, N. Taguchi, A. Sugiura, and M. Tsunekane, "World first laser ignited gasoline engine vehicle," in Proc. The 1st Laser Ignition Conference (LIC' 13) (Pacifico Yokohama Nation Convention Hall, Japan, Apr. 2013), pp. 23-25.
  5. W. Koechner and M. Bass, Solid-State Lasers: A Graduate Text (Springer, NY, USA, 2003), Chapter 2-3.
  6. J. Dong, Y. Ren, and H. Cheng, ">1 MW peak power, an efficient Yb:YAG/:YAG composite crystal passively Q-switched laser," Laser Phys. 24, 055801 (2014). https://doi.org/10.1088/1054-660X/24/5/055801
  7. J. J. Degnan, "Theory of the optimally coupled Q-switched laser," IEEE J. Quantum Electron. 25, 214-220 (1989). https://doi.org/10.1109/3.16265
  8. X. Zhang, S. Zhao, Q. Wang, Q. Zhang, L. Sun, and S. Zhang, "Optimization of $Cr^{4+}$-doped saturable-absorber Qswitched lasers," IEEE J. Quantum Electron. 33, 2286-2294 (1997). https://doi.org/10.1109/3.644112
  9. J. Ma, J. Dong, K.-I. Ueda, and A. A. Kaminskii, "Optimization of Yb:YAG/$Cr^{4+}$:YAG composite ceramics passively Q-switched microchip lasers," Appl. Phys. 105, 749-760 (2011). https://doi.org/10.1007/s00340-011-4711-0
  10. M. Tsunekane and T. Taira, "High peak power, passively Q-switched Yb:YAG/Cr:YAG micro-lasers," IEEE J. Quantum Electron. 49, 454-461 (2013). https://doi.org/10.1109/JQE.2013.2252327
  11. G. Xiao and M. Bass, "A generalized model for passively Q-switched lasers including excited state absorption in the saturable absorber," IEEE J. Quantum Electron. 33, 41-44 (1997). https://doi.org/10.1109/3.554875
  12. B. Lipavsky, Y. Kalisky, Z. Burshtein, Y. Shimony, and S. Rotman, "Some optical properties of $Cr^{4+}$-doped crystals," Opt. Mater. 13, 117-127 (1999). https://doi.org/10.1016/S0925-3467(99)00020-8
  13. G. Xiao, J. H. Lim, S. Yang, E. V. Stryland, M. Bass, and L. Weichman, "Z-scan measurement of the ground and excited state absorption cross section of $Cr^{4+}$ in yttrium aluminum garnet," IEEE J. Quantum Electron. 35, 1086-1091 (1999). https://doi.org/10.1109/3.772180
  14. Z. Burshtein, P. Blau, Y. Kalisky, Y. Shimony, and R. Kokta, "Excited-state absorption studies of $Cr^{4+}$Ions in several garnet host crystals," IEEE J. Quantum Electron. 34, 292-299 (1998). https://doi.org/10.1109/3.658716