Acta Photonica Sinica ›› 2019, Vol. 48 ›› Issue (2): 219002-0219002.doi: 10.3788/gzxb20194802.0219002

• Nonlinear Optics • Previous Articles     Next Articles

Frequency Conversion for Cubic Harmonic Generation in UV Region through 3 m Point Group Crystals with Centrosymmetric Sturcture

SHI Meng-jing1,2, LI Ren-fu2, LI Bing-xuan2, LIU Hua-gang2, LIN Wen-shuo1, PAN Jia1, ZHANG Ge2, YE Ning2   

  1. 1. Mathematics and Physics Institute, Fujian University of Technology, Fuzhou 350108, China;
    2. Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
  • Received:2018-09-10 Online:2019-02-25 Published:2018-11-14
  • Supported by:

    National Natural Science Foundation of China (Nos. 51425205, U1605245, 51602309, 21473096), National Key Research and Development Plan of Ministry of Science and Technology (No. 2016YFB0402104), Strategic Priority Research Program of the Chinese Academy of Sciences (No. XDB20000000), Education and Research Project of Fujian Provincial Education Hall (No. JT180330)

Abstract:

A simple one-step direct third-order nonlinear frequency conversion process in centrosymmetric crystals was studied, and an efficient third-harmonic generation in UV region was obtained. The expressions of phase-matching angles were determined. α-BBO crystal and the calcite crystal which both have the delocalized π bond were selected in our experiment. In type-Ⅱ phase-matched, the maximal output energy was 19.3 μJ and the maximal conversion efficiency was about 1.25% at 266 nm in calcite crystal, while the value was 37.6 μJ and 2.5% in α-BBO crystal. These results indicate the feasibility of direct third-harmonic generation in UV region, the possibility of direct third-harmonic generation in deep-UV region through centrosymmetric crystals, and also demonstrated a succinct and efficient way to generate deep-UV laser and a development direction of nonlinear crystals in UV region.

Key words: Third-harmonic, UV laser, Calcite crystal, Nonlinear frequency conversion, Centrosymmetric crystal, α-BBO crystal

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