2 results about "Preamplifier" patented technology

The invention relates to a measuring device for picosecond time resolution detection of a single photon weak signal. An optical pulse emission controller is connected with a microsecond optical pulseemitter, a picosecond pulse laser mode locker, a condenser, a sample bin, a fluorescence collector, an optical path transmitter, a color separation grating, an optical path aggregator, a light intensity detector, a preamplifier and a signal detection circuit in sequence; and the picosecond pulse laser mode locker is sequentially connected with the signal detection circuit. The measuring method comprises the following steps: an excitation light source emits a light beam to irradiate a sample to reach an electron excited state, and the device detects the time when a single fluorescence photon emitted by the sample reaches a signal detector to obtain the service life of the excited state; in addition, fluorescence emitted by excited state electrons returning to the ground state is fed back tothe light intensity detector through the optical path transmitter and is converted into an emission spectrum signal. According to the invention, the femtosecond oscillation stage is adopted to calibrate the time, and a standard is established for accurately measuring the technical performance of ultra-fast attenuation.