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Frequency conversion in nonlinear photonic crystal of strontium tetraborate


Using a nonlinear photonic crystal (NPC) of strontium tetraborate, we obtained the second-harmonic generation of femtosecond pulses in the nonlinear diffraction regime with an efficiency of 1.9% that is tunable in the near-UV spectral range, as well as fourth-harmonic generation under the conditions of random quasi-phase-matching with maximum efficiency of 10−5 that is tunable in the far-UV spectral range. The efficiency of second-harmonic generation in strontium tetraborate NPC under the conditions of random quasi-phase-matching was significantly lower. The fourth-harmonic was tunable between 187.5 and 232.5 nm. The previously predicted red shift of spectral components in the generated radiation spectrum upon NPC rotation is demonstrated experimentally.

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Correspondence to A. S. Aleksandrovsky.

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Original Russian Text © A.S. Alexandrovsky, A.M. Vyunishev, A.I. Zaitsev, A.A. Ikonnikov, G.I. Pospelov, V.E. Rovskii, V.V. Slabko, 2011, published in Optika i Spektroskopiya, 2011, Vol. 111, No. 2, pp. 180–186.

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Aleksandrovsky, A.S., Vyunishev, A.M., Zaitsev, A.I. et al. Frequency conversion in nonlinear photonic crystal of strontium tetraborate. Opt. Spectrosc. 111, 150 (2011).

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  • Femtosecond Laser
  • Second Harmonic Generation
  • Phase Match
  • Frequency Conversion
  • Pump Radiation