Resonantly pumped, Q-switched Ho:YLF laser with output energy of 5 mJ at 1 kHz

Jacek Kwiatkowski, Jacek Swiderski, Waldemar Zendzian, Jan Karol Jabczynski, Lukasz Gorajek, Mateusz Kaskow


A continuous-wave (CW) and Q-switched operation of a Ho:YLF laser resonantly, single-pass pumped by a Tm: fiber laser operating at a wavelength of 1940nm is presented. At room temperature, for an output coupler of 40% transmission, a maximum CW output power of 11.5W for 32.5W of incident pump power was achieved, corresponding to a slope efficiency of 40%. Applying Q-switching operation, and under CW pumping regime, the pulse repetition frequency (PRF) was changed from 1 to 10kHz. The maximum average output power of 11.23W at the PRF of 10kHz was obtained. Lowering the PRF to 1kHz allows achieving pulse energy of 4.97mJ in a 19ns pulse corresponding to the maximum peak power of 260kW. The Ho:YLF laser operated at the wavelength of 2050.5nm with a FWHM line width of 1.09nm. The output parameters of the laser radiation are sufficient enough to be used for range finding or for pumping mid-infrared optical parametric oscillators.

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  1. K. Scholle, S. Lamrini, P. Koopmann, P. Fuhrberg, chapter 21 in Frontiers in Guided Wave Optics and Optoelectronics, INTECH, ISBN 978-953-7619-82-4, 2010.
  2. J. Kwiatkowski, J.K. Jabczynski, W. Zendzian, L. Gorajek, M. Kaskow, "High repetition rate, Q-switched Ho:YAG laser resonantly pumped by a 20 W linearly polarized Tm: fiber laser", Appl. Phys. B 114, 395 (2014). CrossRef
  3. W. Koen, C. Bollig, H. Strauss, M. Schellhorn, C. Jacobs, M.J.D. Esser, "Compact fibre-laser-pumped Ho:YLF oscillator?amplifier system", Appl. Phys. B 99, 101 (2010). CrossRef
  4. Y.J. Zhang, G. Li, Y.Y. Zhao, Y.N. Chen, "In-band pumped Ho:YAP laser by Tm-Doped fiber laser at 1936 and 1948 nm, respectively", Laser Phys. 22, 415 (2012). CrossRef
  5. H. Chen, D.Y. Shen, X.D. Xu, T. Zhao, X.F. Yang, D.H. Zhou, J. Xu, "High-power 2.1 ?m Ho:Lu1.5Y1.5Al5O12 laser in-band pumped by a Tm fiber laser ", Laser Phys. Lett. 9, 26 (2012). CrossRef
  6. J.W. Kim, J.I. Mackenzie, D. Parisi, S. Veronesi, M. Tonelli, W.A. Clarkson, "Efficient in-band pumped Ho:LuLiF4 2?m laser", Opt. Lett. 35, 420 (2010). CrossRef
  7. B.Q. Yao, X.M. Duan, Y.L. Ju, Y.Z. Wang, "Continuous wave operation of singly-doped Ho:LSO laser at room temperature", Laser Phys. 21, 1888 (2011). CrossRef
  8. X.J. Cheng, J.Q. Xu, M.J. Wang, B.X. Jiang, W.X. Zhang, Y.B. Pan, "Ho:YAG ceramic laser pumped by Tm:YLF lasers at room temperature", Laser Phys. Lett. 7, 351 (2010). CrossRef
  9. A.S. Kurkov, V.A. Kamynin, E.M. Sholokhov, A.V. Marakulin, "Mid-IR supercontinuum generation in Ho-doped fiber amplifier", Laser Phys. Lett. 8, 754 (2011). CrossRef
  10. B.M. Walsh, G.W. Grew, N.P. Barnes, "Energy levels and intensity parameters of Ho3+ ions in GdLiF4, YLiF4 and LuLiF4", J. Phys.: Condens. Matter 17, 7643 (2005). CrossRef

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Photonics Letters of Poland - A Publication of the Photonics Society of Poland
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