中国物理B ›› 2011, Vol. 20 ›› Issue (4): 44206-044206.doi: 10.1088/1674-1056/20/4/044206

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Properties of periodic multicrystal configurations in walk-off-compensating second harmonic generation of ultrashort pulses

黄金哲, 张留洋, 沈涛   

  1. Department of Optical Information Science and Technology, Harbin University of Science and Technology, Harbin 150080, China
  • 收稿日期:2010-06-08 修回日期:2010-10-16 出版日期:2011-04-15 发布日期:2011-04-15
  • 基金资助:
    Project supported by the Tiptop-Talent Fund from Harbin University of Science and Technology.

Properties of periodic multicrystal configurations in walk-off-compensating second harmonic generation of ultrashort pulses

Huang Jin-Zhe(黄金哲)†, Zhang Liu-Yang(张留洋), and Shen Tao(沈涛)   

  1. Department of Optical Information Science and Technology, Harbin University of Science and Technology, Harbin 150080, China
  • Received:2010-06-08 Revised:2010-10-16 Online:2011-04-15 Published:2011-04-15
  • Supported by:
    Project supported by the Tiptop-Talent Fund from Harbin University of Science and Technology.

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摘要： This work designs a four-platelet periodic multicrystal configuration in the second harmonic generation of ultrashort pulses as a new walk-off-compensating device. It theoretically investigates a proposed active and a typical passive compensating scheme with the undepleted-pump approximation. The result shows that the angular and spectral bandwidths are proportional to the number of crystal pairs as expected, but the temperature tunability is basically unaltered owing to inter-plate pulse interference. At the same time, an analysis reveals that a misuse of the phase mismatch factor is responsible for a historic controversy about pulse interference. A real design of an ultraviolet second harmonic generation (262.5 nm) is considered in a passive periodic β-Barium Borate-calcite configuration, where the inter-plate pulse interference is found to form an azimuthal tuning restriction and to lower plate length tolerance. A subsequent numerical simulation with pump depletion is in good accordance with theoretical prediction.

Abstract: This work designs a four-platelet periodic multicrystal configuration in the second harmonic generation of ultrashort pulses as a new walk-off-compensating device. It theoretically investigates a proposed active and a typical passive compensating scheme with the undepleted-pump approximation. The result shows that the angular and spectral bandwidths are proportional to the number of crystal pairs as expected, but the temperature tunability is basically unaltered owing to inter-plate pulse interference. At the same time, an analysis reveals that a misuse of the phase mismatch factor is responsible for a historic controversy about pulse interference. A real design of an ultraviolet second harmonic generation (262.5 nm) is considered in a passive periodic β-Barium Borate-calcite configuration, where the inter-plate pulse interference is found to form an azimuthal tuning restriction and to lower plate length tolerance. A subsequent numerical simulation with pump depletion is in good accordance with theoretical prediction.

Key words: ultrashort pulses, second harmonic generation, periodic-multicrystal-configurations, walk-off-compensating

中图分类号:  (Frequency conversion; harmonic generation, including higher-order harmonic generation)

  • 42.65.Ky
42.70.Mp (Nonlinear optical crystals) 42.79.Nv (Optical frequency converters)