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G. Gayer et. al. Temperature and wavelength dependent refractive index
equations for MgO-doped congruent and stoichiometric LiNbO3;
Appl. Phys. B . 2008
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link.springer.com/article/10.1007/s00340-008-2998-2
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clc;
clear;
close all;
N=1000; % 1000 Points
lambda = linspace(0.5e-6,4e-6,N); % unit: m
T = 20; % degree
ne = zeros(1,N);
for i = 1:N
ne(i) = F_n_e(lambda(i),T);
end
figure();
plot(lambda,ne);
grid on;
xlim([0.5e-6,4e-6]);
ylim([2,2.35]);
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±àдµÄ¼ÆËãÕÛÉäÂʵĴúÂë
function ne_result = F_n_e(lambda_m, T )
%Sellmeier Equation's coefficient
%Sellmeier Equation for ne in Congruent LN %reference: Temperature and wavelength dependent refractive index equations for MgO-doped congruent and stoichiometric LiNbO3;
%Appl. Phys. B . 2008. G. Gayer et. al.
%5% MgO Doped congruent LiNbO3(CLN), HCP Corporation(Which is purchased from Crystal Technology Inc.)
% Input:
% lambda_m: Wavelength lambda in meter, unit: meter
% T: Temperature, unit: degree
% Output:
% ne_result: the refractive index
a1 = 5.756;
a2 = 0.0983;
a3 = 0.2020;
a4 = 189.32;
a5 = 12.52;
a6 = 1.32*10^(-2);
b1 = 2.860*10^(-6);
b2 = 4.700*10^(-8);
b3 = 6.113*10^(-8);
b4 = 1.516*10^(-4);
fT =(T-24.5)*(T+570.82);
lambda = lambda_m * 10^6; ;%½«m±íʾµÄ²¨³¤£¬×ªÎª um±íʾµÄ²¨³¤
ne_2 = a1 + b1*fT + ( a2 + b2*fT) /(lambda^2-(a3 + b3*fT)^2) + ( a4 + b4 * fT )/ (lambda^2 -a5^2) - a6 * lambda^2 ;
ne_result = sqrt(ne_2);
end |
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