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Product catalog summary

Calcium Fluoride for Femtosecond High Power Lasers

Overview:
Calcium fluoride (CaF2) is highlighted as an optimal material for vacuum windows in high-power laser applications due to its low spectral dispersion and non-linear refractive index. It is available in sizes up to 440 mm in diameter, making it suitable for various optical applications.

Specifications:

Nonlinear refractive index: 1.9 x 10^-16 cm² W^-1 at 1064 nm
Refractive index at 1064 nm: 1.42848
Abbe number: 95.23
Thermal conductivity: 9.71 W m^-1 K^-1
Thermal expansion coefficient: 18.41 x 10^-6 K^-1
Modulus of rupture: 36.5 MPa

Products:
CaF2 is available as fine ground blanks or polished windows with a flatness up to λ/10 and scratch/dig 20-10. It can be monocrystalline or oligocrystalline, with maximum diameters of 250 mm and 440 mm, respectively.

Yb³⁺:CaF2 Laser Crystals:
These crystals are ideal for laser diode pumping due to their long fluorescence lifetime and broad absorption bands. They support ultra-short pulses of less than 100 fs.

Properties of Yb³⁺:CaF2:

Dopant concentration: 1-3 at%
Absorption peak wavelength: 980 nm
Fluorescence lifetime: 2.2 ms
Refractive index at 1035 nm: 1.42866

Product Forms:
Available as cut or fine ground blanks, polished or AR coated discs, and rods. The surface quality adheres to ISO 10110-3 standards.

Contact Information:
Hellma Materials GmbH provides contact details for inquiries across various regions including Germany, China, North America, Japan, the UK, and Italy.

Catalog excerpts

Calcium Fluoride for Femtosecond High Power Lasers Low Dispersion, Low B-Integral CaF2 Vacuum Windows Yb3+:CaF2 Laser Crystals

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Low Dispersion, Low B-Integral CaF2 Vacuum WindowsCalcium fluoride features a very low spectral dispersion, a low non-linear refractive index and is available in sizes up to 440 mm diameter. These advantages make it a superior optical material for vacuum windows for spatial filters, target and compressor chambers. Calcium Fluoride properties

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Yb3+:CaF2 Laser CrystalsLong fluorescence lifetime and broad absorption bands turn Yb3+:CaF2 into an ideal material for laser diode pumping. The material exhibits a low linear and non-linear refractive index and shows a broad fluorescence bandwidth supporting ultra short pulses less than 100 fs . Properties of Yb3+:CaF2 [1] D. Milam, et. al, "Nonlinear refractive index of fluoride crystals," Appl. Phys. Lett. 31, 822-824 (1977) [2] D. Milam, ..Review and Assessment of Measured Values of the Nonlinear Refractive-Index Coefficient of Fused Silica", Appl. Opt. 37, 546-550 (1998) [3] A.Major et al,...

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Hellma Materials GmbH Moritz-von-Rohr-StraRe 1 07745 Jena / Germany phone + 49 3641 2877-0 fax + 49 3641 2877-200 [email protected] www.hellma-materials.com For inquiries please contact our local Sales Representative North America Ms Dawn Jennings Silicon Sense, Inc. phone + 1 603 891 4248 fax + 1 603 891 4264 mobile + 1 603 566 8687 [email protected] For inquiries please contact our local Distributor Ms Judy Lim Hellma China Pte Ltd phone + 65 6397 4138 fax + 65 6397 4139 [email protected] Mr Joe Nakane Optopia Co, Ltd phone + 81 44 812 5911 fax + 81 44 812 5921 mobile + 81 90 6045...

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All Hellma GmbH & Co. KG catalogs and technical brochures

*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

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