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Nonlinearity measurement of high power laser detectors at NIST



Xiaoyu X. Li, Thomas Scott, Shao Yang, Christopher L. Cromer, Marla L. Dowell


We briefly explain the fundamentals of detector nonlinearity applicable to both electrical and optical nonlinearity measurements. We specifically discuss the attenuation method for optical nonlinearity measurement that the NIST system is based upon, and we review the possible sources of nonlinearity inherent to thermal detectors used with high-power lasers. We also describe, in detail, the NIST nonlinearity measurement system, in which detector responsivity can be measured at wavelengths of 1.06 'm and 10.6 'm, over a power range from 1 W to 1000 W. We present the data processing method used and show measurement results depicting both positive and negative nonlinear behavior. The expanded uncertainty of a typical NIST high-power laser detector calibration including nonlinearity characterization is about 1.3 %.
Journal of Research (NIST JRES) -


attenuation method, calibraion, calorimeter, chopper wheel, high-power laser, nonlinearity measurement, thermal detector


Li, X. , Scott, T. , Yang, S. , Cromer, C. and Dowell, M. (2004), Nonlinearity measurement of high power laser detectors at NIST, Journal of Research (NIST JRES), National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed May 18, 2024)


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Created December 31, 2003, Updated October 12, 2021