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Yb CaF2 Laser Crystals

Yb CaF2 Laser Crystals 2019-11-17T00:31:12+00:00

Due to its hardness and flexible and inexpensive manufacturing process, CaF 2 has been used in many substrate materials for laser crystals. As a rising ion, Yb 3+ also allows a three-level laser scheme that leads to a low-level error and a longer fluorescence life.

Product Details

Explanation

Due to its hardness and flexible and inexpensive manufacturing process, CaF 2 has been used in many substrate materials for laser crystals. As a rising ion, Yb 3+ also allows a three-level laser scheme that leads to a low-level error and a longer fluorescence life. Yb 3+: CaF 2 can also provide high optical efficiency and high output power due to low thermal load. Recently, ytterbium doped alkaline-earth fluoride has been used mostly in diode-pumped femto-second lasers and amplifiers. Standard Czochralski or
Alkaline-soil fluorides, which can be easily grown using Bridgman technique, show great potential in wide transmission range, high damage threshold and low dispersion behavior.

Yb 3+ Absorption Spectrum: CaF 2 crystal

Specifications

• Low quantum defect

• High damage threshold, good thermal conductivity

• Long fluorescent life

• Low dispersion behavior

• Wide suction bandwidth

• Limited nonlinear effects under intense laser irradiation

Applications

• High-power ultra-thin thin disk oscillators

• Passive mode locking oscillators

• Solid state adjustable laser

Chemical and physical properties

feature value
Chemical formula Yb 3+ : CaF 2
Crystal structure cubic
Cage parameters, Å 5,462
Orientation [111] veya [100] <± 0.5 °
Bulk density 3,18 g / cm 3
Mohs hardness 4
Young’s module 146 GPa
Tensile strength 2 GPa
Melting point 1418 ° C
Thermal conductivity 9.71
Specific Heat/ (J · g -1 · K -1 ) 0,8876
Thermal Expansion / (10 -6 / ° C @ 25 ° C) (16.5 … 19.4)
Thermal shock resistance parameter 800 W / m
Refractive Index @ 1064 nm 1,2996

Optical properties

feature value
Optical density 0,1 ila 0,8
Fluorescence life 2.4ms
concentrations % 0.5 mol% ~ 30 mol%
Emission wavelength 1015 nm ~ 1060 nm
Coefficient of absorption 1,0 cm -1 ~ 7 cm -1
Suction section of soil condition 0.8×10 -20 cm 2
Emission state absorption cross section: 2.2×10 -20 cm 2
transmission % 10 ila% 90
coatings AR≤% 0,2 @ 1030nm
Damage Threshold: > 500 MW / cm 2

Polishing properties

feature value
Orientation Tolerance <0,5 °
Thickness / Diameter Tolerance ± 0,05 mm
Surface Flatness <λ / 832 nm
Ripple Distortion <λ / 832 nm
Surface quality 05/10
Parallel 10 “
Vwertical 15′
Open aperture >% 90
groove <0.1 x 45 °
Maximum dimensions 2 * 2-15 * 15 mm × 20 mm

Standard products

Material Dimensions, mm coatings
Yb (% 5): CaF 2 dia 5 AR ve le; % 0.2 @ 1030 + 940nm
3×3
6×6
Yb (% 3): CaF 2 dia 5
3×3
6×6