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Reflective attenuator for high energy laser measurements



John H. Lehman, David J. Livigni, Xiaoyu X. Li, Christopher L. Cromer, Marla L. Dowell


A high-energy laser attenuator in the range of 250 mJ (20 nsec pulse width, 10 Hz repetition rate, 1064 nm wavelength) is described. The optical elements which constitute the attenuator are mirrors with relatively low reflectance, oriented at 45° angle of incidence. By combining three pairs of mirrors, the incoming radiation is colinear and has the same polarization orientation as the exit. We present damage testing and polarization-dependent reflectance measurements for 1064 nm wavelength laser light at 45° angle of incidence for molybdenum, silicon carbide and copper mirrors. A six element, 74 times (18 dB) attenuator is presented as an example.
Applied Optics


attenuator, laser, mirror


Lehman, J. , Livigni, D. , Li, X. , Cromer, C. and Dowell, M. (2008), Reflective attenuator for high energy laser measurements, Applied Optics, [online], (Accessed April 14, 2024)
Created June 20, 2008, Updated February 19, 2017