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Cavity ring-down technique for measurement of reflectivity of high reflectivity mirrors with high accuracy

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Abstract

A simple, accurate and reliable method for measuring the reflectivity of lasergrade mirrors (R > 99.5%) based on cavity ring-down (CRD) technique has been successfully demonstrated in our laboratory using a pulsed Nd:YAG laser. A fast photomultiplier tube with an oscilloscope was used to detect and analyse the CRD signal. The cavity decay times were measured for three cavities formed by a combination of three mirror pairs. The absolute reflectivities R 1, R 2, R 3 were determined to be 99.94%, 99.63%, 99.52% at normal incidence. The reflectivity of mirrors is measured to an accuracy of 0.01%.

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Authors and Affiliations

  1. Laser & Plasma Technology Division, Bhabha Atomic Research Centre, Mumbai, 400 085, India

    G. Sridhar, Sandeep K. Agarwalla, Sunita Singh & L. M. Gantayet

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  1. G. Sridhar
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  2. Sandeep K. Agarwalla
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  3. Sunita Singh
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  4. L. M. Gantayet
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Correspondence to G. Sridhar.

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Sridhar, G., Agarwalla, S.K., Singh, S. et al. Cavity ring-down technique for measurement of reflectivity of high reflectivity mirrors with high accuracy. Pramana - J Phys 75, 1233–1239 (2010). https://doi.org/10.1007/s12043-010-0211-8

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  • DOI: https://doi.org/10.1007/s12043-010-0211-8

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