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Cavity ring-down technique for measurement of reflectivity of high reflectivity mirrors with high accuracy
G Sridhar Sandeep K Agarwalla Sunita Singh L M Gantayet
Conributed Papers Volume 75 Issue 6 December 2010 pp 1233-1239
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Keywords
Cavity ring-down method ;reflectivity measurement ;optical resonator. -
Abstract
A simple, accurate and reliable method for measuring the reflectivity of laser-grade mirrors ($R$ > 99.5%) based on cavity ring-down (CRD) technique has been success-fully 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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Author Affiliations
G Sridhar1 Sandeep K Agarwalla1 Sunita Singh1 L M Gantayet1
- Laser & Plasma Technology Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
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Dates
- Published
- December 2010
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Pramana – Journal of Physics
Volume 96, 2022
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