Singlet oxygen (<sup>1</sup>O<sub>2</sub>) is widely considered to play a major role in photodynamic therapy (PDT), and thus an increasing attention has been focused on the direct detection of <sup>1</sup>O<sub>2</sub> near-infrared luminescence around 1270 nm for PDT dosimetry. A new sensitive detection system is developed to directly measure the temporal and spectral resolved <sup>1</sup>O<sub>2</sub> luminescence spectra. The triplet state and <sup>1</sup>O<sub>2</sub> lifetimes of Rose Bengal as a model photosensitizer in different solvents are determined, and the obtained results agree well with the published data. Our detection system has the potential application in <sup>1</sup>O<sub>2</sub> luminescence-based PDT dosimetry.
© 2010 Chinese Optics Letters
(170.3890) Medical optics and biotechnology : Medical optics instrumentation
(170.5180) Medical optics and biotechnology : Photodynamic therapy
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence
Buhong Li, Huiyun Lin, Defu Chen, Min Wang, and Shusen Xie, "Detection system for singlet oxygen luminescence in photodynamic therapy," Chin. Opt. Lett. 8, 86-88 (2010)