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Compact Tunable Narrowband Terahertz-Wave Source Based on Difference Frequency Generation Pumped by Dual Fiber Lasers in MgO:LiNbO3

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Abstract

We demonstrate a high-average-power, single longitudinal-mode, and tunable terahertz (THz)-wave source based on difference frequency generation (DFG) in a MgO:LiNbO3 (MgO:LN) crystal. The waves for DFG are generated using a pair of Yb-doped pulsed fiber lasers with a master oscillator power fiber amplifier configuration. The average power of the THz-wave output reaches 450 μW at 1.07 THz (280 μm) at a linewidth of 7.2 GHz, and the tunability ranges from 0.35 to 1.07 THz under the pulse repetition frequency of 500 kHz. A short burn-in test of the THz wave is also carried out, and the output power stability is within ± 5% of the averaged power without any active stabilizing technique. The combination of MgO:LN-DFG and stable and robust fiber laser sources is highly promising for the development of high-average-power THz-wave sources, particularly in the high transmission sub-THz region. This approach may enable new applications of THz-wave spectroscopy in imaging and remote sensing.

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Authors and Affiliations

  1. Ricoh Company Ltd., 5-10 Yokarakami, Kumanodo,Takadate, Natori, Miyagi, 981-1241, Japan

    Yoshio Wada, Takumi Satoh & Yasuhiro Higashi

  2. Phluxi, Inc., 1-8-5-2202 Harumi, Chuo-ku, Tokyo, 104-0053, Japan

    Yoshiharu Urata

Authors
  1. Yoshio Wada
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  2. Takumi Satoh
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  3. Yasuhiro Higashi
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  4. Yoshiharu Urata
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Correspondence to Yoshio Wada.

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Wada, Y., Satoh, T., Higashi, Y. et al. Compact Tunable Narrowband Terahertz-Wave Source Based on Difference Frequency Generation Pumped by Dual Fiber Lasers in MgO:LiNbO3 . J Infrared Milli Terahz Waves 38, 1471–1476 (2017). https://doi.org/10.1007/s10762-017-0437-3

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  • DOI: https://doi.org/10.1007/s10762-017-0437-3

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