Aicong Geng
Chinese Academy of Sciences
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Featured researches published by Aicong Geng.
Applied Optics | 2006
Yong Bo; Aicong Geng; Yong Bi; Zhipei Sun; Xiaodong Yang; Qin-Jun Peng; Huiqing Li; Ruining Li; Dafu Cui; Zuyan Xu
We have obtained green-beam quality of M2 = 6.2 at an average output power of 120 W by intracavity frequency doubling of a diode-side-pumped, Q-switched Nd:YAG rod laser with a repetition rate of 10 kHz and an optical-to-optical conversion efficiency of 15.2%. To achieve high-beam quality at high average power, the laser employs a thermally near-unstable resonator design with two-rod birefringence compensation in an L-shaped flat-flat cavity. The output power fluctuation of the green laser remains less than 0.9% in 4 h.
Applied Optics | 2005
Aiyun Yao; Wei Hou; Yong Bi; Aicong Geng; Xuechun Lin; Yupeng Kong; Dafu Cui; Ling-An Wu; Zuyan Xu
We report on a high-power (cw) red laser at 671 nm by intracavity frequency doubling of a double-end-pumped 1342 nm Nd:YVO4 laser based on the nonlinear crystal LiB3O5. A red output power of 3.38 W is obtained for a pump power of 27 W, with corresponding optical-to-optical efficiency of 12.5%. The 671 nm beam is nearly diffraction limited.
Applied Physics Letters | 2005
Qinjun Peng; Guiling Wang; Yong Bo; X. G. Guo; Aicong Geng; Zuyan Xu; Liyong Ren; Yani Zhang; Yishan Wang; Wei Zhao; Lili Wang
A highly efficient tunable tapered-polymer-fiber (TPF) laser was demonstrated by use of a compound parabolic TPF doped with Rhodamine-6G (R6G) dye. The tuning ranges over 40 nm at the visible region for laser output with the maximum output energy of 600 mu J at 570 nm and the optical-optical conversion efficiency of 23% were achieved by a prism as a spectrally selective element. Moreover, the coupling efficiency for the taper exceeded 90%. Compared to traditional polymer fibers with a micrometer-size core diameter, the taper allows for a higher pump to be launched without damaging the fiber endfaces, and it can efficiently couple the light into the fiber and alleviate the alignment difficulty. So, the TPF laser not only possesses all of the advantages of traditional polymer-fiber lasers, and it can also obtain higher output energy and higher efficiency. Additionally, it is insensitive to geometrical displacements. (c) 2005 American Institute of Physics.
Nonlinear Optical Phenomena and Applications | 2005
Qinjun Peng; Xiaodong Yang; Xuejun Wang; Aicong Geng; Aiyun Yao; Yong Bi; Zuyan Xu
Thermally induced rupture of a nonlinear crystal is the primary limiting factor to the attainment of High average power (HAP) in an optical parametric amplifier (OPA). In this paper, HAP scaling behavior in an OPA is addressed in detail by combining thermally induced phase mismatching with thermally induced rupture. Expressions for thermally induced stress are derived and analyzed that can give directions for a HAP-OPA design. When an OPA generates the maximum average output power, the dependence of flaw size on thermo optical material parameters of nonlinear crystals is obtained that is very useful for surface processing, material selecting, properties improving of a nonlinear crystal and new HAP nonlinear crystals developing.
Optics Communications | 2006
Guiling Wang; Aicong Geng; Yong Bo; Huiqing Li; Zhipei Sun; Yong Bi; Dafu Cui; Zuyan Xu; Xin Yuan; Xiaoqing Wang; Guangqiu Shen; Dezhong Shen
Applied Physics B | 2006
Yingjie Chen; Haibo Peng; Wei Hou; Qinjun Peng; Aicong Geng; Lin Guo; Dafu Cui; Z. Xu
Applied Physics B | 2008
Hong-Jun Zhang; Guofu Wang; Limin Guo; Aicong Geng; Yong Bo; D. F. Cui; Z. Xu; Ruiqiang Li; Y. Zhu; Xianwu Wang; Chuangtian Chen
Optics and Lasers in Engineering | 2006
Aicong Geng; Yong Bo; Yong Bi; Zhipei Sun; Xiaodong Yang; Qinjun Peng; Huiqing Li; Ruining Li; Dafu Cui; Zuyan Xu
Optics Communications | 2006
X. G. Guo; Wei Hou; Haibo Peng; Hengli Zhang; Guiling Wang; Yong Bi; Aicong Geng; Yahui Chen; Dafu Cui; Zuyan Xu
Optics Communications | 2006
Xiaodong Yang; Yong Bo; Qinjun Peng; Hengli Zhang; Aicong Geng; Qianjin Cui; Zhipei Sun; Dafu Cui; Zuyan Xu