| ○種別 (必須): | □ | 国際会議
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| ○言語 (必須): | □ | 英語
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| ○審査 (推奨): | □ | Peer Review
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| ○カテゴリ (推奨): | □ | 研究
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| ○著者 (必須): | 1. | (英) Yusufu Taximaiti (日) Yusufu Taximaiti (読)
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| 2. | 時実 悠 ([徳島大学.ポストLEDフォトニクス研究所])
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| 3. | (英) Masaki Yamada (日) Masaki Yamada (読)
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| 4. | (英) Katsuhiko Miyamoto (日) Katsuhiko Miyamoto (読)
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| 5. | (英) Takashige Omatsu (日) Takashige Omatsu (読)
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| ○題名 (必須): | □ | (英) Tunable milli-joule-level 2µm fractional vortex optical parametric amplifier (日)
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| ○要約 (任意): | □ | (英) Fractional vortex lasers with a fractional topological charge, l, exhibiting a unique fractional radial opening, have been attractive for the optical manipulating of microscopic particles and super-resolution spectroscopy based on stimulated emission depletion. They have also recieved much attention in fundamental physics, including an analogy concerning the quantum flux in the Aharonov-Bohm effect. Such applications of the fractional vortex lasers frequently require wavelength diversity. In particular, tunable fractional vortex lasers in a mid-infrared region, including the eigen frequencies of many molecules originating by the vibration modes, will potentially be attractive for manipulating molecules and molecular spectroscopy with high spatial resolution. Second-order nonlinear frequnecy conversion is a promising method to extend the wavelength range of laser sources. However, the conservation of topological charge, l, in an optical parametric down-conversion process causes a question, i.e., how does the orbital angular momentum of the pump beam divide between the signal and idler outputs? To date, we have demonstrated 2μϖι fractional vortex output with a topological charge l=0.5 from a 1μm vortex pumped optical parametric oscillator (2μϖι fractional vortex OPO) formed by a plane-parallel cavity configuration and a nonlinear crystal KTP [1]. (Such the fractional optical vortex operation is never permitted in a conventional stable laser cavity [2].) However, the pulse energy (<0.5mJ) of the fractional vortex output is limited by severe diffraction loss in the plane-parallel cavity configuration. Also, the lasing wavelength of the fractional vortex output was fixed at 2.128μm. (日)
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| ○誌名 (必須): | □ | (英) The European Conference on Lasers and Electro-Optics (CLEO_Europe) 2013 (日) The European Conference on Lasers and Electro-Optics (CLEO_Europe) 2013 (読)
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| ○頁 (必須): | □ | CA_10_3 CA_10_3
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| ○都市 (必須): | □ | ミュンヘン (Munich/[ドイツ連邦共和国])
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| ○年月日 (必須): | □ | 西暦 2013年 3月 12日 (平成 25年 3月 12日)
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| ○URL (任意): | □ | https://ieeexplore.ieee.org/document/6800600
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| ○DOI (任意): | □ | 10.1109/CLEOE-IQEC.2013.6800600 (→Scopusで検索)
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