1 January 2005 High-accuracy optical power measurements by using electrical-substitution cryogenic radiometer
Author Affiliations +
An optical power scale is established at Ulusal Metroloji Enstitüsü (UME) using the helium-cooled primary-level electrical-substitution cryogenic radiometer. The scale is established at discrete laser wavelengths of vertically polarized tuneable Ar+, fixed He-Ne, and Nd:YAG (with second harmonic) laser sources. To increase measurement accuracy, laser intensities are stabilized to better than 0.009% using an electro-optical modulator. The spatial profiles of polarized laser beams are cleaned with a spatial filter. The optical power is measured using the static substitution method with an uncertainty of a few parts in 10–4. Repeatability of optical power measurements in the static substitution method, the measurement of window transmittance, and the measurement of power in a scattered beam are the most significant uncertainty components.
© (2005) Society of Photo-Optical Instrumentation Engineers (SPIE)
Özcan Bazkir, Özcan Bazkir, Sevilay Ugur, Sevilay Ugur, Farhad Samedov, Farhad Samedov, Akif Esendemir, Akif Esendemir, } "High-accuracy optical power measurements by using electrical-substitution cryogenic radiometer," Optical Engineering 44(1), 016401 (1 January 2005). https://doi.org/10.1117/1.1829097 . Submission:


Back to Top