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KAKEN_23244084seika.pdf
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Title |
Title |
先端光源を融合した超高分解能赤外分子分光計の開発
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Kana |
センタン コウゲン オ ユウゴウ シタ チョウコウブンカイノウ セキガイ ブンシ ブンコウケイ ノ カイハツ
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Romanization |
Sentan kogen o yugo shita chokobunkaino sekigai bunshi bunkokei no kaihatsu
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Development of ultra high resolution mid-infrared molecular spectrometer combining advanced sources
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佐々田, 博之
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Kana |
ササダ, ヒロユキ
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Romanization |
Sasada, Hiroyuki
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Affiliation |
慶應義塾大学・理工学部・教授
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Research team head
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科研費研究者番号 : 30146576
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稲場, 肇
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Kana |
イナバ, ハジメ
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Romanization |
Inaba, Hajime
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Affiliation |
産業技術総合研究所・計測標準部門・主任研究員
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Research team member
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科研費研究者番号 : 70356492
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吉田, 尚弘
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Kana |
ヨシダ, ナオヒロ
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Romanization |
Yoshida, Naohiro
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Affiliation |
東京工業大学・総合理工研究科・教授
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Research team member
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科研費研究者番号 : 60174942
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洪, 鋒雷
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Hong, Fen-Lei
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産業技術総合研究所・計測標準部門・室長
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Research team member
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科研費研究者番号 : 10260217
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保坂, 一元
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ホサカ, カズモト
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Hosaka, Kazumoto
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Affiliation |
産業技術総合研究所・計測標準部門・研究員
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Research team member
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科研費研究者番号 : 50462859
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辻, 潔
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Kana |
ツジ, キヨシ
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Romanization |
Tsuji, Kiyoshi
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Affiliation |
東京工業大学・総合理工研究科・助教
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Research team member
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科研費研究者番号 : 90272707
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2014
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科学研究費補助金研究成果報告書
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2013
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Abstract |
86.8 - 93.1 THzにわたりメタンのサブドップラー分解能分光を行い、204本の遷移周波数を数kHzの不確かさで決定した。結果はHITRAN2012に掲載された。差周波発生用のパンプ光源とシグナル光源の周波数を光コムに安定化し、光コムの繰り返し周波数を変えてアイドラー光を掃引してメタン、CH3I、HClの微弱なスペクトル線を記録した。太い光ビームと結合する光共振器セルを使い、飽和吸収のスペクトル線幅を80kHzに狭めた。デュアルコムの2台の光コムの相対線幅を1Hz以下に狭め、波長1.0 ~1.8 μmにおよぶスペクトルを分解能48MHz、測定時間140msで記録した。
Sub-Doppler resolution spectroscopy of methane has been carried out from 86.8 to 93.1 THz, and 204 transition frequencies have been determined with an uncertainty of a few kHz. The results are listed in HITRAN 2014 database. The pump and signal frequencies for difference-frequency-generation are stabilized to the optical frequency comb, and the idler frequency is swept by varying the repetition rate to record weak spectral lines of methane, methyl iodine, and hydrogen chloride. An enhanced-cavity absorption-cell coupled with a wide beam reduces the width of the saturation lines to 80 kHz. The relative spectral linewidth of the optical frequency combs for dual-comb spectroscopy is reduced below 1Hz, and absorption spectrum from 1.0 to 1.8 micron m is recorded with a spectral resolution of 48 MHz and an acquisition time of 140 ms.
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研究種目 : 基盤研究(A)
研究期間 : 2011~2013
課題番号 : 23244084
研究分野 : 数理系科学
科研費の分科・細目 : 原子・分子・量子エレクトロニクス
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