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Unformatted text preview: SK5 Flint Glass Properties SK5 flint glass is an isotropic dielectric that is widely used in laser optics. The index of refraction of such glasses as a function of wavelength may be accurately repre- sented using a Sellmeier equation of the form n 2 = A + G 1 2 2- 2 1 + G 2 2 2- 2 2 + G 3 2 2- 2 3 , where A , k , and G k are called the Sellmeier coefficients. The quantities k and G k represent resonant wavelengths and oscillator strengths respectively. To determine the group velocity, a knowledge of the first derivative is needed. Likewise, to determine the dispersion, a knowledge of the second derivative is needed. For SK5 flint glass, A = 1, G 1 = 0 . 99146, 1 = 72 . 300 nm , G 2 = 0 . 49598, 2 = 131 . 428 nm , G 3 = 0 . 98739, 3 = 9 , 917 . 634 nm . For a freespace wavelength of = 589 . 3 nm (sodium D line), calculate, showing all work, numerical values of the index of refraction n , the first derivative dn/d in m- 1 , and the second derivative...
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- Spring '08