KEYWORDS: Luminescence, Signal detection, Ultrafast phenomena, Life sciences, Picosecond phenomena, Cancer, Microscopes, Single photon detectors, Photomultipliers, Laser development
The fluorescence spectrum and decay characteristics of normal and cancerous cells are measured and compared using a time-correlated single-photon counting system in this paper. Furthermore, the measurements of fluorescence decay characteristics at different locations inside the cells are performed by same method. The results obtained can be used as an important basis for cancer diagnosis.
Using a known delay interval produced by the standard flat lens and the optical film as the time standards for detecting ultrashort laser pulses, this paper have studied the standard measurement methods of time calibration of picosecond (10-12S) and femtosecond (10-15S) laser pulses respectively through Michelson-interference light path.
The temperature effect of laser Raman scattering spectrum of optical fiber was researched. We applied the optical time domain reflection technique of optical fiber, laser Raman scattering spectrometry, bi-wavelength two channel detection technique, high speed instantaneous state wave-shape sample average technique and computer technique to the distributed optical fiber sensor temperature system, use it for the measurement of temperature field in space.
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