Abstract
A method for estimating the limiting optical pulse parameters, which can be measured by uncooled bolometers, is proposed. Calculations show that modern microbolometers with a $10~\mu \text{s}$ time constant can provide a response time approximately 10−12 s at the measuring pJ pulse energy with SNR > 500. An algorithm based on analyzing the time dependence of the voltage drop across the resistive element in the cooling period is proposed and described for measuring the average per pulse power of optical radiation with known pulse duration and period equal to several thermal constants of the bolometer. This algorithm has high-accuracy in measuring the pulse power using the low-cost detection system due to the high efficiency and the minimum noise bandwidth of the ADC chip. The results of the experimental studies of the NiTi-bolometer confirmed the model estimates.
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