Current Optics and Photonics

  • 제2권6호
  • /
  • Pages.582-588
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  • 2018
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  • 2508-7266(pISSN)
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  • 2508-7274(eISSN)
한국광학회 (Optical Society of Korea)
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High Repetition Wavelength-locked 878.6 nm LD Dual-end-pumped Nd:YVO4 1064 nm Laser

  • Li, Yue (Jilin Key Laboratory of Solid Laser Technology and Application, School of Science, Changchun University of Science and Technology) ;
  • Yu, Yong-Ji (Jilin Key Laboratory of Solid Laser Technology and Application, School of Science, Changchun University of Science and Technology) ;
  • Wang, Yu-Heng (Jilin Key Laboratory of Solid Laser Technology and Application, School of Science, Changchun University of Science and Technology) ;
  • Liu, Hang (Jilin Key Laboratory of Solid Laser Technology and Application, School of Science, Changchun University of Science and Technology) ;
  • Liu, He-Yan (Jilin Key Laboratory of Solid Laser Technology and Application, School of Science, Changchun University of Science and Technology) ;
  • Jin, Guang-Yong (Jilin Key Laboratory of Solid Laser Technology and Application, School of Science, Changchun University of Science and Technology)
  • 투고 : 2018.08.20
  • 심사 : 2018.10.08
  • 발행 : 2018.12.25
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초록

A $Nd:YVO_4$ laser dual-end-pumped by a wavelength-locked 878.6 nm laser diode is presented. At the repetition rate of 500 KHz, the absorbed pump power of 58 W, an output power of 26.1 W at 1064 nm is obtained, corresponding to an optical-optical efficiency of 45%. The pulse width is 44.2 ns. Meanwhile, the effects of traditional 808 nm pumping and 878.6 nm dual-end-pumping on the output laser beam quality and pulse width are compared and analyzed in an experiment.

키워드

KGHHD@_2018_v2n6_582_f0003.png 이미지

FIG. 1. Heat load, temperature and stress intensity in crystal at wave-locked 878.6 nm and 808 nm.

KGHHD@_2018_v2n6_582_f0004.png 이미지

FIG. 2. Curves of thermal lens focal length of the laser crystal and the pump power at different pump wavelengths.

KGHHD@_2018_v2n6_582_f0005.png 이미지

FIG. 3. The pulse width varies with repetition rate curve.

KGHHD@_2018_v2n6_582_f0006.png 이미지

FIG. 4. The experimental device of dual-end-pumped A-O Q-switched pumped by wavelength-locked 878.6 nm.

KGHHD@_2018_v2n6_582_f0007.png 이미지

FIG. 5. Output power varies with absorb power curve.

KGHHD@_2018_v2n6_582_f0008.png 이미지

FIG. 7. Wavelength-locked 878.6 nm pumping falling edge triggers the waveform corresponding to the control level of the Q switch and the RF timing relationship at 500 kHz.

KGHHD@_2018_v2n6_582_f0009.png 이미지

FIG. 6. Wavelength-locked 878.6 nm pumping Nd:YVO4 laser output power varies with the repetition rate of 100~500 kHz.

KGHHD@_2018_v2n6_582_f0010.png 이미지

FIG. 8. The curve of pulse width of the wavelength-locked 878.6 nm pumped at repetition rate of 100~500 kHz.

KGHHD@_2018_v2n6_582_f0011.png 이미지

FIG. 9. The pulse width diagram of the wavelength-locked 878.6 nm direct pump and 808 nm traditional pump at 500 kHz.

KGHHD@_2018_v2n6_582_f0012.png 이미지

FIG. 10. In the condition of maximum pump power, the intensity distribution of output laser pumped by wavelength-locked 878.6 nm pumping and 808 nm pumping at 500 KHz.

TABLE 1. Parameters used in the LASCAD simulation

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참고문헌

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  2. J. Lee, H.-J. Moon, and J. Yi, "Intracavity frequency doubling of a slab Nd:YAG laser pumped by high power diode laser array," J. Opt. Soc. Korea 2, 5-8 (1998). https://doi.org/10.3807/JOSK.1998.2.1.005
  3. Y.-J. Yu, X.-Y. Chen, C. Wang, C.-T. Wu, R. Liu, and G.-Y. Jin, "A 200 kHz Q-switched adhesive-free bond composite Nd:$YVO_4$ laser using a double-crystal RTP electro-optic modulator," Chin. Phys. Lett. 29, 024206-1-024206-4 (2012). https://doi.org/10.1088/0256-307X/29/2/024206
  4. L. Xu, H.-L. Zhang, Y.-F. Mao, B.-O. Deng, X.-L. Yu, J.-L. He, J.-C. Xing, and J. G. Xin, "340 W Nd:YVO4 Innoslab laser oscillator with direct pumping into the lasing level," Laser Phys. Lett. 11, 115809 (2014). https://doi.org/10.1088/1612-2011/11/11/115809
  5. J.-L. Liu, Z.-Y. Wang, H. Li, Q. Liu, and K.-S. Zhang, "Stable 12 W continuous-wave single-frequency Nd:$YVO_4$ green laser polarized and dual-end pumped at 880 nm," Opt. Express 19, 6777-6782 (2011). https://doi.org/10.1364/OE.19.006777
  6. M. Kim, G.-P. Kwon, and J. Lee, "Fully analytic approach to evaluate laser-induced thermal effects," Curr. Opt. Photon. 1, 649-654 (2017).
  7. X. Ding, S.-J. Yin, C.-P. Shi, X. Li, B. Li, Q. Sheng, X.-Y. Yu, W.-Q. Wen, and J.-Q. Yao, "High efficiency 1342 nm Nd:$YVO_4$ laser in-band pumped at 914 nm," Opt. Express 19, 14315-14320 (2011). https://doi.org/10.1364/OE.19.014315
  8. H. Lin, J.-F. Li, and X.-Y. Liang, "105 W, <10 ps, TEM (00) laser output based on an in-band pumped Nd:$YVO_4$ Innoslab amplifier," Opt. Lett. 37, 2634-2636 (2012). https://doi.org/10.1364/OL.37.002634
  9. X. Delen, F. Balembois, O. Musset, and P. Georges, "Characteristics of laser operation at 1064 nm in Nd:$YVO_4$ under diode pumping at 808 and 914 nm," J. Opt. Soc. Am. B 28, 52-57 (2011). https://doi.org/10.1364/JOSAB.28.000052
  10. X.-P. Yan, Q. Liu, X. Fu, H.-L. Chen, M.-L. Gong, and D.-S. Wang, "High repetition rate dual-rod acousto-optics Q-switched composite Nd:$YVO_4$ laser," Opt. Express 17, 21956-21968 (2009). https://doi.org/10.1364/OE.17.021956
  11. H.-L. Hong, L. Huang, Q. Liu, P. Yan, and M.-L. Gong, "Compact high-power, TEM (00) acousto-optics Q-switched Nd:$YVO_4$ oscillator pumped at 888 nm," Appl. Opt. 51, 323-327 (2012).
  12. Q. Liu, M.-M. Nie, F.-Y. Lu, M.-L. Gong, "High-power, wavelength-locked 878.6 nm in-band pumped, acousticoptically Q-switched Nd:$YVO_4 MOPA laser with TEM00 mode," IEEE Photon. J. 8, 1-9 (2016).