Development of a new fiber-coupled optical pyrometer

A fast optical pyrometer for shock temperature measurement was developed based on GDB159/142 photo-multiplier tubes (PMT) and one single optical fiber incorporated with dichroic filters. Main features include the central wavelengths within the spectrum range of 340~811nm, a rise-time of 2~3ns, and measurable shock temperature span of 2500~15000K.Results of the pulse-linearity measurements indicate that the dynamical linearity values for all six channels are greater than 200mV (50 load resistor) which meet the requirement for recording on the digital oscilloscopes with good signal-to-noise ratio. Calibration method by the spectral irradiance with a halogen lamp and examples of dynamic measurements are presented. It is demonstrated that this system produces reasonable outputs with stable performance at an economical cost.