Optical constants

Refractive index of D-LAF53-25 (CDGM)

D-LAF53-25: n,k 0.302–2.325 µm

Data
formula 2 + tabulated k
Range
0.302–2.325 µm
Temperature
293 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.302–2.325 µm
Refractive index n
1.7421
Extinction coefficient k
2.34385e-08
Permittivity ε1
3.0349
Permittivity ε2
8.16642e-08
Absorption coefficient α
0.00501254 cm⁻¹
Penetration depth δ = λ/(2πk)
3.98999e+09 nm
Abbe number Vd
49.246
Chromatic dispersion dn/dλ
-0.0774878 µm⁻¹
Group index ng
1.78763
Group velocity dispersion
139.576 fs²/mm
Dispersion parameter D
-761.464 ps/(nm·km)
Photon energy
2.11001 eV

ε = (n + ik)², α = 4πk/λ, ng = n − λ dn/dλ, GVD = λ³/(2πc²) d²n/dλ², D = −(λ/c) d²n/dλ². Group-velocity dispersion is given for formula data only.

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith
import lightsmith as ls

# D-LAF53-25 (CDGM): D-LAF53-25
cdgm_d_laf53_25 = ls.fetch_refractiveindex("specs", "CDGM-optical", "D-LAF53-25", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(cdgm_d_laf53_25.range_nm)  # (302, 2325) nm
eps = cdgm_d_laf53_25.eps([633])  # complex permittivity

Downloads the original record once (pinned to the imported snapshot) and caches it.

Lightsmith is open source (MIT): Mie, T-matrix, BEM, DDA, FDTD, RCWA, TMM, mode solvers and inverse design behind one spec, on CPU or GPU. GitHub.

Dispersion formula

Sellmeier (C in µm²) (formula 2), λ in µm
n2−1=1.32239317λ2λ2−0.00606224219+0.646347208λ2λ2−0.0234824415+1.17507569λ2λ2−87.8164211

Valid from 0.302 to 2.325 µm.

Coefficients as stored
CiValue
C10.0
C21.32239317
C30.00606224219
C40.646347208
C50.0234824415
C61.17507569
C787.8164211

Comments and conditions

anneal rate:25°C/h

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: 7.67e-06 2.36e-08 -1.95e-10 6.35e-07 3.67e-10 0.208
nd
1.742100
Vd
49.246024
glass code
742493
density
value: 4260
thermal expansion
value: 5.6e-06, temperature range: 243 343; value: 7.2e-06, temperature range: 293 573
dPgF
-0.009
resistance
climatic: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = 5.50e-06 K⁻¹ at 633 nm, dn/dT = 4.58e-06 K⁻¹ at 1310 nm, dn/dT = 4.50e-06 K⁻¹ at 1550 nm

References

Cite

CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com); See also CDGM optical glass data sheets; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

Computed on 431 wavelengths, the same grid as the API and the library
D-LAF53-25 (CDGM), D-LAF53-25: n and k versus wavelength
λ (µm)nk
0.3021.8126777.016700e-06
0.3035491.8115456.757971e-06
0.3051061.8104316.497915e-06
0.306671.8093336.236526e-06
0.3082431.8082525.973795e-06
0.3098241.8071875.709718e-06
0.311.8070695.680300e-06
0.3114131.8061375.397253e-06
0.313011.8051035.077293e-06
0.3146151.8040844.755692e-06
0.3162291.803084.432441e-06
0.317851.802094.107533e-06
0.3194811.8011143.780959e-06
0.321.8008073.676900e-06
0.3211191.8001533.539145e-06
0.3227661.7992053.336416e-06
0.3244211.7982713.132647e-06
0.3260851.797352.927834e-06
0.3277571.7964422.721969e-06
0.3294381.7955462.515050e-06
0.331.7952512.445900e-06
0.3311281.7946632.345346e-06
0.3328261.7937932.193935e-06
0.3345331.7929342.041747e-06
0.3362491.7920881.888779e-06
0.3379731.7912531.735027e-06
0.3397061.7904291.580486e-06
0.341.7902911.554300e-06
0.3414481.7896171.463375e-06
0.34321.7888161.353454e-06
0.344961.7880261.242968e-06
0.3467291.7872461.131917e-06
0.3485071.7864771.020295e-06
0.351.7858429.265800e-07
0.3502941.7857189.156291e-07
0.3520911.7849698.487996e-07
0.3538971.7842317.816275e-07
0.3557121.7835027.141108e-07
0.3575361.7827836.462479e-07
0.3593691.7820735.780369e-07
0.361.7818325.545800e-07
0.3612121.7813725.257463e-07
0.3630651.7806814.816924e-07
0.3649271.7799994.374125e-07
0.3667981.7793253.929056e-07
0.368681.7786613.481704e-07
0.371.7782013.167700e-07
0.370571.7780053.093744e-07
0.3724711.7773572.847329e-07
0.3743811.7767182.599649e-07
0.3763011.7760872.350700e-07
0.3782311.7754632.100473e-07
0.381.7749021.871100e-07
0.3801711.7748481.859682e-07
0.382121.7742411.729285e-07
0.384081.7736411.598220e-07
0.386051.7730491.466482e-07
0.388031.7724641.334069e-07
0.391.7718931.202300e-07
0.390021.7718871.201645e-07
0.392021.7713171.135427e-07
0.394031.7707541.068871e-07
0.3960511.7701981.001972e-07
0.3980821.7696489.347308e-08
0.41.7691398.712500e-08
0.4001241.7691068.694011e-08
0.4021761.768578.388072e-08
0.4042391.7680418.080564e-08
0.4063121.7675187.771479e-08
0.4083961.7670027.460809e-08
0.410491.7664927.148546e-08
0.4125951.7659886.834681e-08
0.4147111.765496.519206e-08
0.4168381.7649986.202114e-08
0.4189761.7645135.883395e-08
0.421.7642835.730700e-08
0.4211251.7640325.666095e-08
0.4232841.7635585.542018e-08
0.4254551.763095.417304e-08
0.4276371.7626275.291951e-08
0.429831.7621695.165955e-08
0.4320351.7617175.039313e-08
0.434251.761274.912021e-08
0.4364771.7608284.784076e-08
0.4387161.7603924.655475e-08
0.441.7601454.581700e-08
0.4409661.7599614.520261e-08
0.4432271.7595354.376396e-08
0.44551.7591134.231793e-08
0.4477851.7586974.086448e-08
0.4500821.7582853.940358e-08
0.452391.7578793.793518e-08
0.454711.7574773.645926e-08
0.4570421.7570793.497577e-08
0.4593861.7566863.348467e-08
0.461.7565843.309400e-08
0.4617421.7562983.254862e-08
0.464111.7559143.180719e-08
0.466491.7555343.106195e-08
0.4688831.7551593.031289e-08
0.4712871.7547882.955999e-08
0.4737041.7544212.880322e-08
0.4761341.7540582.804258e-08
0.4785751.7536992.727803e-08
0.481.7534932.683200e-08
0.481031.7533442.647733e-08
0.4834971.7529942.562771e-08
0.4859761.7526472.477373e-08
0.4884691.7523042.391536e-08
0.4909741.7519652.305260e-08
0.4934921.7516292.218541e-08
0.4960231.7512972.131378e-08
0.4985671.7509692.043767e-08
0.51.7507871.994400e-08
0.5011231.7506451.998883e-08
0.5036931.7503242.009137e-08
0.5062771.7500062.019444e-08
0.5088731.7496922.029804e-08
0.5114831.7493822.040217e-08
0.5141061.7490742.050683e-08
0.5167431.748772.061203e-08
0.5193931.748472.071777e-08
0.5220561.7481722.082405e-08
0.5247341.7478782.093088e-08
0.5274251.7475872.103826e-08
0.530131.7472992.114618e-08
0.5328491.7470132.125466e-08
0.5355811.7467312.136370e-08
0.5383281.7464522.147329e-08
0.5410891.7461762.158345e-08
0.5438641.7459032.169417e-08
0.5466531.7456332.180546e-08
0.5494571.7453652.191732e-08
0.551.7453142.193900e-08
0.5522751.74512.202971e-08
0.5551071.7448382.214266e-08
0.5579541.7445792.225620e-08
0.5608151.7443222.237031e-08
0.5636911.7440682.248501e-08
0.5665821.7438162.260030e-08
0.5694881.7435672.271618e-08
0.5724091.7433212.283266e-08
0.5753441.7430772.294973e-08
0.5782951.7428352.306740e-08
0.5812611.7425962.318568e-08
0.5842421.7423592.330456e-08
0.5872381.7421252.342405e-08
0.590251.7418932.354416e-08
0.5932771.7416632.366488e-08
0.5963191.7414362.378622e-08
0.5993781.7412112.390818e-08
0.61.7411652.393300e-08
0.6024521.7409872.377605e-08
0.6055411.7407672.357825e-08
0.6086471.7405482.337943e-08
0.6117681.7403312.317960e-08
0.6149061.7401172.297874e-08
0.6180591.7399042.277685e-08
0.6212291.7396942.257392e-08
0.6244151.7394852.236995e-08
0.6276171.7392792.216494e-08
0.6308361.7390742.195888e-08
0.6340711.7388712.175176e-08
0.6373231.7386712.154357e-08
0.6405921.7384722.133432e-08
0.6438771.7382752.112400e-08
0.6471791.7380792.091260e-08
0.651.7379152.073200e-08
0.6504981.7378862.074788e-08
0.6538341.7376942.085423e-08
0.6571871.7375042.096113e-08
0.6605581.7373162.106858e-08
0.6639451.737132.117658e-08
0.6673511.7369452.128514e-08
0.6707731.7367612.139425e-08
0.6742131.736582.150391e-08
0.6776711.73642.161415e-08
0.6811461.7362212.172494e-08
0.684641.7360442.183631e-08
0.6881511.7358692.194825e-08
0.691681.7356952.206076e-08
0.6952271.7355232.217384e-08
0.6987931.7353522.228751e-08
0.71.7352942.232600e-08
0.7023761.7351822.224998e-08
0.7059791.7350142.213474e-08
0.7095991.7348482.201892e-08
0.7132381.7346822.190250e-08
0.7168961.7345182.178549e-08
0.7205731.7343562.166787e-08
0.7242681.7341942.154965e-08
0.7279831.7340342.143083e-08
0.7317161.7338762.131140e-08
0.7354691.7337182.119135e-08
0.7392411.7335622.107069e-08
0.7430321.7334072.094941e-08
0.7468431.7332532.082751e-08
0.7506731.7331012.070498e-08
0.7545231.7329492.058182e-08
0.7583921.7327992.045803e-08
0.7622821.732652.033361e-08
0.7661911.7325022.020855e-08
0.770121.7323552.008285e-08
0.774071.7322091.995650e-08
0.778041.7320641.982951e-08
0.782031.731921.970186e-08
0.7860411.7317771.957356e-08
0.7900721.7316361.944460e-08
0.7941241.7314951.931498e-08
0.7981961.7313551.918469e-08
0.81.7312941.912700e-08
0.802291.7312161.887120e-08
0.8064051.7310781.841161e-08
0.810541.7309411.794965e-08
0.8146971.7308051.748533e-08
0.8188751.730671.701863e-08
0.8230751.7305361.654953e-08
0.8272961.7304021.607803e-08
0.8315391.730271.560411e-08
0.8358031.7301381.512776e-08
0.840091.7300071.464896e-08
0.8443981.7298771.416771e-08
0.8487291.7297471.368399e-08
0.851.729711.354200e-08
0.8530821.7296191.359106e-08
0.8574571.7294911.366071e-08
0.8618541.7293641.373072e-08
0.8662741.7292371.380108e-08
0.8707171.7291111.387181e-08
0.8751821.7289861.394290e-08
0.8796711.7288621.401436e-08
0.8841821.7287381.408618e-08
0.8887171.7286151.415837e-08
0.8932741.7284931.423093e-08
0.8978561.7283711.430386e-08
0.91.7283141.433800e-08
0.902461.728251.437722e-08
0.9070881.7281291.445099e-08
0.9117411.7280091.452514e-08
0.9164161.7278891.459968e-08
0.9211161.727771.467459e-08
0.925841.7276521.474989e-08
0.9305881.7275341.482558e-08
0.9353611.7274171.490165e-08
0.9401581.72731.497812e-08
0.944981.7271841.505497e-08
0.9498261.7270681.513222e-08
0.951.7270631.513500e-08
0.9546971.7269521.520978e-08
0.9595931.7268371.528772e-08
0.9645151.7267221.536607e-08
0.9694611.7266081.544482e-08
0.9744331.7264941.552397e-08
0.979431.7263811.560353e-08
0.9844531.7262681.568350e-08
0.9895021.7261551.576387e-08
0.9945771.7260431.584466e-08
0.9996781.7259311.592587e-08
11.7259241.593100e-08
1.00481.7258191.600755e-08
1.009961.7257081.608966e-08
1.015141.7255971.617219e-08
1.020341.7254861.625514e-08
1.025581.7253761.633851e-08
1.030841.7252651.642232e-08
1.036121.7251551.650655e-08
1.041441.7250461.659122e-08
1.046781.7249361.667632e-08
1.052151.7248271.676185e-08
1.057541.7247181.684783e-08
1.061.7246681.688700e-08
1.062971.7246091.693425e-08
1.068421.72451.702113e-08
1.07391.7243911.710844e-08
1.07941.7242831.719621e-08
1.084941.7241751.728443e-08
1.09051.7240661.737309e-08
1.09611.7239581.746222e-08
1.101721.723851.755180e-08
1.107371.7237431.764184e-08
1.113051.7236351.773234e-08
1.118761.7235271.782330e-08
1.124491.7234191.791474e-08
1.130261.7233121.800664e-08
1.136061.7232041.809901e-08
1.141881.7230961.819185e-08
1.147741.7229891.828518e-08
1.153621.7228811.837898e-08
1.159541.7227731.847326e-08
1.165491.7226661.856802e-08
1.171471.7225581.866328e-08
1.177471.722451.875902e-08
1.183511.7223421.885525e-08
1.189581.7222341.895197e-08
1.195681.7221261.904919e-08
1.21.722051.911800e-08
1.201811.7220181.924821e-08
1.207981.721911.969060e-08
1.214171.7218012.013526e-08
1.22041.7216932.058219e-08
1.226661.7215842.103142e-08
1.232951.7214752.148295e-08
1.239271.7213662.193680e-08
1.245631.7212572.239298e-08
1.252021.7211472.285149e-08
1.258441.7210372.331236e-08
1.264891.7209272.377559e-08
1.271381.7208172.424119e-08
1.27791.7207072.470919e-08
1.284451.7205962.517958e-08
1.291041.7204852.565238e-08
1.297661.7203742.612762e-08
1.304321.7202622.660528e-08
1.311011.720152.708540e-08
1.317731.7200382.756798e-08
1.324491.7199252.805304e-08
1.331281.7198122.854058e-08
1.338111.7196992.903062e-08
1.344971.7195852.952318e-08
1.351871.7194713.001826e-08
1.35881.7193563.051588e-08
1.365771.7192413.101605e-08
1.372771.7191263.151879e-08
1.379811.719013.202411e-08
1.386891.7188943.253202e-08
1.3941.7187773.304253e-08
1.41.7186783.347300e-08
1.401151.7186593.357411e-08
1.408341.7185423.420499e-08
1.415561.7184233.483911e-08
1.422821.7183043.547647e-08
1.430121.7181853.611711e-08
1.437451.7180653.676103e-08
1.444821.7179443.740825e-08
1.452231.7178233.805880e-08
1.459681.7177013.871268e-08
1.467171.7175793.936991e-08
1.474691.7174564.003051e-08
1.482251.7173324.069451e-08
1.489861.7172074.136190e-08
1.49751.7170824.203272e-08
1.505181.7169564.270698e-08
1.51291.716834.338470e-08
1.520651.7167034.406589e-08
1.528451.7165754.475058e-08
1.536291.7164464.543878e-08
1.544171.7163174.613051e-08
1.552091.7161864.682578e-08
1.560051.7160554.752462e-08
1.568051.7159234.822705e-08
1.576091.715794.893308e-08
1.584181.7156574.964272e-08
1.59231.7155225.035601e-08
1.61.7153955.103200e-08
1.600471.7153875.131634e-08
1.608671.7152515.631904e-08
1.616921.7151136.134740e-08
1.625221.7149756.640155e-08
1.633551.7148367.148162e-08
1.641931.7146967.658774e-08
1.650351.7145558.172005e-08
1.658811.7144138.687868e-08
1.667321.714279.206377e-08
1.675871.7141269.727545e-08
1.684471.7139811.025139e-07
1.693111.7138351.077791e-07
1.701791.7136871.130714e-07
1.710521.7135391.183908e-07
1.719291.7133891.237375e-07
1.728111.7132381.291116e-07
1.736971.7130861.345133e-07
1.745881.7129331.399427e-07
1.754831.7127791.453999e-07
1.763831.7126231.508851e-07
1.772881.7124671.563985e-07
1.781971.7123091.619401e-07
1.791111.7121491.675101e-07
1.81.7119941.729300e-07
1.800291.7119891.735321e-07
1.809531.7118271.924871e-07
1.818811.7116632.115393e-07
1.828131.7114992.306892e-07
1.837511.7113322.499373e-07
1.846931.7111652.692842e-07
1.856411.7109962.887303e-07
1.865931.7108263.082761e-07
1.87551.7106543.279221e-07
1.885111.710483.476689e-07
1.894781.7103053.675170e-07
1.90451.7101293.874668e-07
1.914271.7099514.075190e-07
1.924081.7097714.276740e-07
1.933951.709594.479324e-07
1.943871.7094074.682946e-07
1.953841.7092224.887613e-07
1.963861.7090365.093330e-07
1.973931.7088485.300102e-07
1.984051.7086585.507934e-07
1.994231.7084675.716832e-07
21.7083585.835300e-07
2.004461.7082736.077506e-07
2.014741.7080786.636151e-07
2.025071.7078817.197661e-07
2.035461.7076827.762051e-07
2.045891.7074818.329335e-07
2.056391.7072798.899529e-07
2.066931.7070749.472646e-07
2.077531.7068671.004870e-06
2.088191.7066591.062772e-06
2.09891.7064481.120970e-06
2.109661.7062351.179466e-06
2.120481.706021.238263e-06
2.131361.7058031.297361e-06
2.142291.7055841.356762e-06
2.153271.7053621.416468e-06
2.164321.7051391.476480e-06
2.175421.7049131.536800e-06
2.186571.7046851.597429e-06
2.197791.7044541.658369e-06
2.21.7044081.670400e-06
2.209061.7042211.927048e-06
2.220391.7039862.248066e-06
2.231771.7037482.570731e-06
2.243221.7035082.895050e-06
2.254721.7032653.221033e-06
2.266291.703023.548687e-06
2.277911.7027723.878022e-06
2.289591.7025224.209045e-06
2.301331.7022694.541767e-06
2.313141.7020134.876195e-06
2.3251.7017545.212337e-06

Optical transmission calculator

Free-standing sample in vacuum, normal incidence
Method
Transmittance T
—
Reflectance R
—

Fresnel reflection calculator

Direction
Rp
—
Rs
—
R = (Rp+Rs)/2
—
Phase φp
—
Phase φs
—
Brewster angle θB
—
Critical angle θC
—