| Presentation | 2012-05-25 Phase-sensitive CARS spectroscopy by phase modulation of monochromatic component in broadband pulses Takayuki SUZUKI, Kazuhiko MISAWA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In the field of CARS spectroscopy using a broadband light source, nonresonant background (NRB) which lies on and hides resonant signals is known to be one of the major problems. Water is especially a large noise source which makes biomedical application quiet difficult. In this study, we proposed phase-sensitive detection of resonant signals normally buried in the NRB by a narrowband phase modulation on a broadband laser pulse. Here, the NRB are positively used as local oscillator for the detection. We demonstrated CARS spectroscopy based on the proposed phase sensitive method with a sample of chloroform molecules. We successfully obtain sharp resonant signals of chloroform with a frequency resolution of 8 cm^<-1> and signal-to-noise ratio of greater than 9 dB. We also extend our method to two dimensional microscopy for chloroform droplets in water. The chloroform droplets were clearly observed even when they were embedded in water. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Femtosecond pulse / CARS spectroscopy / Phase modulation / Heterodyne detection |
| Paper # | LQE2012-1 |
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| Conference Information | |
| Committee | LQE |
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| Conference Date | 2012/5/18(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Lasers and Quantum Electronics (LQE) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Phase-sensitive CARS spectroscopy by phase modulation of monochromatic component in broadband pulses |
| Sub Title (in English) | |
| Keyword(1) | Femtosecond pulse |
| Keyword(2) | CARS spectroscopy |
| Keyword(3) | Phase modulation |
| Keyword(4) | Heterodyne detection |
| 1st Author's Name | Takayuki SUZUKI |
| 1st Author's Affiliation | Faculty of Engineering, Tokyo University of Agriculture and Technology() |
| 2nd Author's Name | Kazuhiko MISAWA |
| 2nd Author's Affiliation | Faculty of Engineering, Tokyo University of Agriculture and Technology |
| Date | 2012-05-25 |
| Paper # | LQE2012-1 |
| Volume (vol) | vol.112 |
| Number (no) | 62 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |