Yb CaF2 Laser Crystals

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Product Details

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Description

Due to the toughness and the flexible and cheap production process, CaF2 has been used in many substrate materials for laser crystals. As an amplifying ion, Yb3+ also allows a three-level laser scheme, leading to low quantum defects and a significantly longer fluorescence lifetime. Yb3+:CaF2 can also provide a high optical efficiency and high output powers due to the reduced thermal load. Recently, ytterbium-doped alkaline-earth fluoride is mostly used in diode-pumped femtosecond laser and amplifiers. Alkaline-earth fluorides which can be easily grown by using the standard Czochralski or Bridgman technique show a great potential in the wide transmission range, high damage threshold and low dispersion behavior.

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Absorption Spectrum of Yb3+:CaF2 crystal

Features

•  Low quantum defect

•  High damage threshold, good thermal conductivity

•  Long fluorescence lifetime

•  Low dispersion behavior

•  Broad absorption bandwidth

•  Limited nonlinear effects under intense laser irradiation


Applications

•  High power ultrafast thin-disk oscillators

•  Passively mode-locked oscillators

•  Solid state tunable laser


Chemical and physical properties

Property

Value

Chemical formula 

Yb3+:CaF2

Crystal structure

cubic

Lattice parameters, Å 

5.462

Orientation

[111] or [100] < ±0.5°

Mass density 

3.18 g/cm3

Mohs hardness

4

Young's modulus

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

Property

Value

Optical Density    

0.1 to 0.8

Fluorescence lifetime

2.4ms

Concentrations

0.5 mol % ~ 30 mol %

Emission wavelength

1015 nm ~ 1060 nm

Absorption Coefficient

1.0 cm-1 ~ 7 cm-1

Ground state absorption cross section

0.8x10-20 cm2

Emission state absorption cross section:

2.2x10-20 cm2

Transmission

10% to 90%

Coatings

AR≤ 0.2% @1030nm

Damage Threshold:

> 500 MW / cm2


Polishing Specification

Property

Value

Orientation Tolerence

< 0.5°

Thickness/Diameter Tolerance

±0.05 mm

Surface Flatness

<λ/8 @632 nm

Wavefront Distortion

<λ/8 @632 nm

Surface Quality

10/5

Parallel

10〞

Perpendicular

15ˊ

Clear Aperture

>90%

Chamfer

<0.1×45°

Maximum dimensions

2*2-15*15 mm×20mm


Standard products

Material

Dimensions,mm

Coatings

Yb(5%):CaF2

dia 5

AR&le; 0.2% @1030+940nm

3x3

6x6

Yb(3%):CaF2

dia 5

3x3

6x6


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With Laser Crystals for sale, it is one of the leading manufacturers and supplies of good yb caf2 laser crystals, welcome to buy and wholesale products at good price from our factory.

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