Recently, Institute of Scientific and Technical Information of China (ISTIC) published a report and index on the Chinese papers published in domestic and overseas Journals in 2011. The paper “Diode-pumped passively Q-switched Nd:Lu0.33Y0.37Gd0.3VO4 laser using a single-walled carbon nanotube saturable absorber” by Prof. Zhao Shengzhi, who works in SDU’s School of Information Science and Engineering, was awarded the prize “Top 100 most cited Chinese papers published in international Journals in 2011”. This is the second time for Prof. Zhao Shengzhi to win this award.

The paper was published in Laser Physics Letters（21(1), pp.74-78，Impact factor in 2011: 9.970)，and it was cited 21 times in 2011. In this paper, a diode-pumped passively Q-switched Nd:Lu0.33Y0.37Gd0.3VO4 (Nd:LuYGdVO4) laser at 1.06 μm with a single-walled carbon nanotube saturable absorber was demonstrated. At the incident pump power 9.1 W, the minimum pulse width of 52 ns and the maximum peak power 66.5 W were obtained. In order to compare different gain media, the passively Q-switched Nd:LuVO4 and Nd:Lu0.15Y0.85VO4 (Nd:LuYVO4) lasers under the same laser cavity were also investigated. The experimental results showed that Nd:LuYGdVO4 crystal was more suitable for passively Q-switched laser with single-walled carbon nanotube saturable absorber than Nd:LuVO4 or Nd:LuYVO4 crystals.

In 2010, the paper “Dual-loss-modulated Q-switched and mode-locked Nd: GdVO4 laser with AO and Cr4+:YAG saturable absorber” published in Laser Phys.Lett.,7(1),pp.29-33 by Prof. Zhao Shengzhi, was also awarded the “Top 100 most cited Chinese papers published in international Journals in 2010”. In that paper, a diode-pumped dual-loss-modulated Q-switched and mode-locked (QML) Nd:GdVO4 laser with acousto-optic (AO) modulator and Cr4+:YAG saturable absorber was presented. The experimental results showed that the dual-loss-modulated QML laser had the nearly 100% modulation depth and deeper than the modulation depth 85% of the passively QML pulse. The Q-switch pulse energy of the dual-loss-modulated QML laser were measured and higher than that only with Cr4+:YAG. The stability of the QML laser with the dual-loss-modulation was significantly improved if compared to that only with Cr4+:YAG.

Prof. Zhao Shengzhi received his Bachelor Degree from the Department of Optics in Shandong University in 1982. He received his Master’s degree of Science in Institute of Physics, Chinese Academy of Sciences in 1986. Currently he works as Professor and PhD Candidate supervisor in the School of Information Science and Engineering, Shandong University. Prof. Zhao Shengzhi is a member of Editing Committee of Journal of Infrared and Laser Engineering and a standing Committee Member of Professional Association of Photo-electronic Technology, Chinese Society of Astronautics. As a visiting scholar supported by the Chinese government, he once studied and performed research work at the Institute of Applied Physics of Berne University, Switzerland, and College of Optics in University of Central Florida, U.S.A. Prof. Zhao Shengzhi has long been engaged in teaching and research work on solid-state laser devices, nonlinear optics, laser physics and technology, optoelectronics, etc.

In recent years, Prof. Zhao Shengzhi has undertaken several projects financed by Ministry of Education of the People's Republic of China, National Natural Science Foundation and Natural Science Foundation of Shandong Province, respectively. He has won the first prize of the Chinese Colleges Awards for Natural Science, the first prize of outstanding scientific research achievement of Shandong colleges. Up to date, he has published more than 150 papers indexed by SCI or EI in the important domestic and overseas academic journals and compiled the book “Nonlinear Optics” for graduate students. In 2009, Prof. Zhao Shengzhi was awarded the outstanding graduate students supervisors of Shandong Province. In addition, two PhD students supervised by Prof. Zhao Shengzhi have won the Outstanding Doctoral Dissertations of Shandong Province.

Written by: Yang Kejian

Edited by: Ben Hammer, Jing Zizhao

Source: School of Information Science and Engineering,www.view.sdu.edu.cn