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Reflective attenuators for high energy laser measurements



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


A high-energy laser attenuator in the range of 250 mJ (20 nsec pulse width, 10 Hz repetition rate, 1064 nm, 1574 nm wavelengths) is described. The optical elements that 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 collinear and has the same polarization orientation as the exit. We present damage testing and polarization-dependent reflectance measurements for 1064 nm and 1574 nm wavelength laser light at 45° angle of incidence for germanium, tungsten, molybdenum, silicon carbide and copper mirrors. The combination of tungsten and silicon carbide provides a single attenuator having approximately 300x attenuation at 1064 nm and 100x attenuation at 1574 nm. We also present 600x and 1000x attenuator results.
Conference Dates
March 22-26, 2010
Conference Location
Anaheim, CA
Conference Title
Measurement Science Conference 2010


attenuator, laser induced damage, polarization, reflectance


Lehman, J. , Livigni, D. , Cromer, C. , Li, X. and Dowell, M. (2010), Reflective attenuators for high energy laser measurements, Measurement Science Conference 2010, Anaheim, CA, [online], (Accessed July 19, 2024)


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Created March 14, 2010, Updated February 19, 2017