Výsledky vyhledávání - "Yoshiharu Urata"

Measuring material parameters using a tunable monochromatic terahertz wave source

Autor: Yasuhiro Higashi, Yoshio Wada, Hiroshi Ito, Yoshiharu Urata

Publikováno v: Applied optics. 59(32)

We measured complex refractive indices of materials that transmitted well in the terahertz (THz) range using a tunable, monochromatic pulsed THz wave source and a high-sensitivity semiconductor detector. This approach is based on simple monochromatic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e98552286e02b80e7e8e09f174a2011
https://pubmed.ncbi.nlm.nih.gov/33175776

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Direct Spectroscopic Imaging of Medicine Tablets using Monochromatic Tunable Terahertz-wave Source and Highly Sensitive Semiconductor Detector

Autor: Yoshio Wada, Yasuhiro Higashi, Hiroshi Ito, Yoshiharu Urata

Publikováno v: 2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz).

We investigated direct spectroscopic imaging of just opened, unformed over the counter (OTC) medicine tablets using a monochromatic tunable pulsed THz-wave source and highly sensitive semiconductor detector. This simple transmission power spectroscop

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4a6aa04a6d8755cea292f7f4174d5375
https://doi.org/10.1109/irmmw-thz46771.2020.9370554

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Continuously Tunable Terahertz-wave Parametric Source based on Spectral Drill Cavity

Autor: Katsuhiko Miyamoto, Seigo Ohno, Yoshiharu Urata, Norihiko Sekine, Shin'ichiro Hayashi

Publikováno v: 2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz).

We propose continuously tunable terahertz-wave parametric source based on spectral drill cavity. When controlling of terahertz wave frequency by wavelength conversion using a nonlinear crystal, we have to control two laser beams. One is a frequency s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c5d06bc80611edcc840b6bb1d2d135e5
https://doi.org/10.1109/irmmw-thz46771.2020.9370657

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Continuously Tunable NIR Pulsed Parametric Sources by an Is-OPG / OPA for Terahertz-wave Generation

Autor: Katsuhiko Miyamoto, Norihiko Sekine, Seigo Ohno, Shin'ichiro Hayashi, Yoshiharu Urata

Publikováno v: 14th Pacific Rim Conference on Lasers and Electro-Optics (CLEO PR 2020).

We demonstrated single-longitudinal-mode, continuously tunable (1.54 – 1.60 μm) and pulsed (~ 1 ns) parametric sources by injection-seeded PPLN-OPG / KTA-OPA as stabilized and tunable (controlled by “spectral drill” cavity) beams for terahertz

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::846d1b029f18f69e850de2bc5a822e93
https://doi.org/10.1364/cleopr.2020.p3_6

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

Autor: Yasuhiro Higashi, Yoshio Wada, Takumi Satoh, Yoshiharu Urata

Publikováno v: Journal of Infrared, Millimeter, and Terahertz Waves. 38:1471-1476

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 fi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b5f154e86772da14ddd62032f872bf6c
https://doi.org/10.1007/s10762-017-0437-3

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Multimilliwatt pulsed terahertz-wave source pumped by dual fiber lasers for imaging application

Autor: Yasuhiro Higashi, Yoshio Wada, Yoshiharu Urata, Takumi Satoh

Publikováno v: Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XII.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::30a212208ecbde7b713a86f43286c80a
https://doi.org/10.1117/12.2509324

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High-repetition-rate tunable narrowband terahertz-wave generation based on nonlinear frequency conversion pumped by dual fiber lasers in MgO:LiNbO3

Autor: Yoshio Wada, Yasuhiro Higashi, Yoshiharu Urata, Takumi Satoh

Publikováno v: Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XI.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::817fd098a2cef35740c3b7e02a6660dc
https://doi.org/10.1117/12.2287293

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128 mJ/Pulse, Laser-Diode-Pumped, Q-Switched Tm:YAG Laser

Autor: Yoshiharu Urata, Masaki Yumoto, Satoshi Wada, Norihito Saito

Publikováno v: IEEE Journal of Selected Topics in Quantum Electronics. 21:364-368

We demonstrated a high-pulse-energy, laser-diode-pumped Tm:YAG laser in AO Q-switched operation. In laser experiments, we introduced a composite-type Tm:YAG laser rod with undoped endcaps. The rod was pumped by 785-nm quasi-continuous-wave laser diod

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::801c333d7711528752ff4db2d7be240e
https://doi.org/10.1109/jstqe.2014.2338872

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