Abstract
A time gating system has been constructed that is capable of recording high quality Raman spectra of highly fluorescing biological samples while operating below the photodamage threshold. Using a collinear gating geometry and careful attention to power conservation, we have achieved all-optical switching with a one picosecond gating time and 5% peak gating efficiency. The energy per pulse in this instrument is more than 3 orders of magnitude weaker than previous reports. Using this system we have performed proof-of-concept experiments on a sample composed of perylene dissolved in toluene, and the stem of a Jasminum multiflorum plant, the latter case being particularly important for the study of plants used in production of cellulosic biofuels. In both cases, a high SNR spectrum of the high-wavenumber region of the spectrum was recorded in the presence of an overwhelming fluorescence background.
Original language | English (US) |
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Pages (from-to) | 20049-20058 |
Number of pages | 10 |
Journal | Optics Express |
Volume | 18 |
Issue number | 19 |
DOIs | |
State | Published - Sep 13 2010 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics