Ultrafast Measurement of Fluorescence Photons with Tow-Photon Interference

利用双光子干涉超快测量荧光光子

• 批准号: 04452049
• 负责人: MATSUOKA Masahiro
• 金额: $ 3.46万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04452049/
• 关键词: Two-photon interference; Michelson interferometer; Femtosecond pulse; Ultrafast Measurement; Coherence time; Pulse width; Fluorescence lifetime; Laser pulse; レーザーパルス

We have proposed a two-photon-interference method to measure simultaneously the coherence time and pulse width of ultrafast optical pulses. Femtosecond measurement will be possible for optical pulses of very wide wavelength regions without limit in time resolution and at very low intensity photon-counting levels.Two outputs from a Michelson interferometer are detected by two detectors, and coincidences are counted by varying the optical path difference. When the path difference is zero, the counting rate decreases, and produces a narrow dip having the width of the coherence time and a wide dip having the width of the order of the pulse width.We have succeeded in measuring dye-laser pulses, scattered pulses from fine powder Basso scattered pulses from colloidal emulsion (diluted milk) and fluorescence of Nile Blue dye solution in dimethylaniline. As the variation of the measurement, two samples of BaSO_4, or the emulsion are placed in the two arms of the interferometer. We succeeded in measuring the wide dip alone which is favorable when we want to know the pulse width (or pulse shape) alone. However, it is thus far not possible in the case of the fluorescence. Further investigation is needed to reveal the reasons.

提出了一种双光子干涉法同时测量超快光脉冲的相干时间和脉宽。飞秒光脉冲的测量可以在很宽的波长范围内进行，而不受时间分辨率的限制，并且可以在很低的强度光子计数水平上进行测量。当路径差为零时，计数率下降，并产生一个窄的倾角具有的相干时间的宽度和宽的倾角具有的脉冲宽度的顺序的宽度。我们已经成功地测量染料激光脉冲，从细粉Basso散射脉冲从胶体乳液（稀释牛奶）和荧光的尼罗蓝染料二甲基苯胺溶液的散射脉冲。作为测量的变化，两个BaSO_4样品或乳胶样品被放置在干涉仪的两个臂上。我们成功地单独测量了宽倾角，当我们想单独知道脉冲宽度（或脉冲形状）时，这是有利的。然而，这在荧光的情况下是不可能的。需要进一步调查以揭示原因。

项目成果

久我隆弘,平野琢也,宮本洋子,松岡正浩: "Two-photon correlation of squeezed pulse train" Optics Communications. 105. 214-218 (1994)

Takahiro Kuga、Takuy​​a Hirano、Yoko Miyamoto、Masahiro Matsuoka：“压缩脉冲串的双光子相关性”光学通信 105. 214-218 (1994)。

G.Drobny, I.Jex and M.Matuoka: "Collapse-revival phenomenon in process of k-photon down conversion with superpositions of number states" J.Mod.Opt. 39. 2229-2243 (1992)

G.Drobny、I.Jex 和 M.Matuoka：“数态叠加的 k 光子下转换过程中的塌缩-复活现象”J.Mod.Opt。

Igor Jex,小芦 雅斗 松岡 正浩: "Phase of the Field in the Interaction with Two Two-Level Atoms" Quantum Optics. (1993)

Igor Jex、Masato Koashi、Masahiro Matsuoka：“两个二能级原子相互作用中的场相”量子光学 (1993)。

宮本 洋子,久我 隆弘 馬場 基芳,松岡 正浩: "Measurement of Ultrafast Optical Pulses with Two-Photon Interfevence" Optics Letters. 18. (1993)

Yoko Miyamoto、Takahiro Kuga、Motoyoshi Baba、Masahiro Matsuoka：“利用双光子干涉测量超快光脉冲”光学快报 18。（1993 年）

G.Drobny',Igor Jex 松岡 正浩: "Collapse-Revival Phenomena in the Process of k-Photon Down Conversion with Superpositions of umber St." J.Modern Optics. 39. 2229-2243 (1992)

G.Drobny，Igor Jex Masahiro Matsuoka：“k 光子下转换过程中的塌缩-复兴现象与琥珀圣的叠加。”J.Modern Optics 39. 2229-2243 (1992)