Products
Home /CRYSTALS /

Window crystals

/LiF crystal lithium fluoride

LiF crystal lithium fluoride

HGO grows LiF crystals in house using Czochralski technology. LiF crystal or lithium fluoride crystal is an optical material with outstanding transmittance in VUV region. It is also used for windows, prisms, and lenses in the visible and infrared in 0.104µm-7µm.

LiF single crystal is sensitive to thermal shock and would be attacked by atmospheric moisture at 400°C. When working at a high temperature of 600°C, the LiF crystal softens and is slightly plastic, so it can be bent into radius plates. In addition irradiation produces color centers. Hence, users should take measures to protect LiF crystals from moisture and high energy radiation damages.

What is more LiF can be cleaved along (100) plane and less commonly (110) plane. The optical characteristics are good and yet the structure is not perfect and cleavage is difficult.

  • Product Origin:

    China
  • Shipping Port:

    Fuzhou, China
  • Lead Time:

    3-4weeks
Share To : f t y b l ins
  • Product Detail

Descriptions:

HGO grows LiF crystal lithium fluoride. LiF crystal or lithium fluoride crystal is an optical material with outstanding transmittance in VUV region. It is widely used for windows, prisms, and lenses in the visible and infrared in 0.104µm-7µm.




Main application:

1) X-ray monochromator plates UV photomultiplier tubes

2) Optical material for VUV applications

3) Windows, prisms, and lenses


Main Features:

1) Tends to create color centers.

2) Max temperature for application:400°C

3) Excellent VUV region transmittance

4) Sensitive to thermal shock


Optical properties of LiF crystal:

Transmission Range

0.105 … 6 µm

Refractive Index

no = 1.37327@2.5µm, 1.624@0.12 µm

Reflective Loss

4.4% @4.0 µm

Poisson Ratio

0.326

Absorption Coefficient/cm-`1

0.74×10-3@2.7µm


Basic properties of LiF crystal:

Density

2.64g/cm3

Melting Point

870

Molar Mass

25.9394

Lattice Parameters

4.0279 Å

Thermal Conductivity

4.01 W/(m K)

Specific Heat

1562 (J kg-1 K-1)

Thermal Expansion Coefficient

28.1 - 34.8 (10-6/K)

Knoop Hardness

102–103kg/mm2

Mohs Hardness

3

Young's Modulus

64.79 GPa

Shear Modulus

55.14 GPa

Bulk Modulus

62.03 GPa

Rupture Modulus

10.8 MPa

Elastic Coefficient

C11 = 112 / C12 = 45.6 / C44 = 3.2 GPa

Crystal Type

Fm3m, cubic, NaCl type structure

Dielectric Constant

9.0 @ 25 °C, f = 100...109 Hz

Solubility in Water

0.27 (g/100 cm3) @ 18 °C

Apparent Elastic Limit/ MPa

11.2@1620 psi

Cleavage

-100


HGO offers LiF specifications:

Orientation:

<100>

Wavefront Distortion:

λ/4per inch @ 632.8 nm

Dimension Tolerances

rods with diameter: +0.0/-0.05 mm , Length: ±0.1 mm

Surface Quality:

20/10 Scratch/Dig MIL-O-1380A

Parallelism:

< 20

Perpendicularity:

< 10

Clear Aperture:

> 90%

Surface Flatness:

< λ/8 @ 632.8 nm

Chamfer:

< 0.25 mm @ 45deg.

Size

Upon customer request

Quality Warranty Period

One year under proper use


Why Choose HGO ?

HG OPTRONICS.,INC. is one of few growers who LiF crystals in house. The use of high quality starting materials for crystal growth, whole boule interferometry, precise inspection of scattering particle in crystal using He-Ne laser and delicated measurement of bulk losses using spectrophotometer assures that each crystal will comply with customer’s specification and perform well.

In addition, we can also produce other types of window crystals like YAG crystals, BaF2,MgF2 Crystals, etc.

Leave A Message
If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.
Related Products
MgF2 crystal window
MgF2 crystal Magnesium Fluoride

MgF2 or Magnesium Fluoride is positive uni-axial crystal with a very high optical transmittance from the vacuum UV to IR. It is regularly used for optical elements where extreme ruggedness and durability is required. It also has a large resistance to mechanical and thermal shock, to optical radiation, and is chemically stable, making it a very useful materials for UV and IR optics.

Read More
CaF2 crystal windows
CaF2 crystal Calcium Fluoride windows

CaF2 or Calcium Fluoride is a cubic crystal with an excellent transmission from 130 nm to 10 μm and has widespread applications as transparent windows in the ultraviolet and infrared spectra.

Read More
Pure YAG window crystal
YAG window crystals Yttrium Aluminum Garnet

Pure YAG Yttrium Aluminum Garnet is a new substrate and window material that can be used for both UV and IR optics. It is particularly useful for high-temperature and high-energy applications. The mechanical and chemical stability of YAG is comparable to sapphire crystal, but YAG is unique with no birefringence which is extremely important for some optical applications.

Read More
Ti:sapphire laser crystals
Ti:Sapphire Crystal Titanium Doped Sapphire

Ti:Sapphire crystal is the most widely used tunable solid-state laser material combining the supreme physical and optical properties with the extremely broad lasing range. Its lasing bandwidth can support pulses < 10fs making it the crystal of choice for femtosecond mode-locked oscillators and amplifiers. The absorption band of Ti:Sapphire centers at ~ 490 nm so it may be conveniently pumped by various laser sources such as argon ion lasers or frequency doubled Nd:YAG, Nd:YLF, Nd:YVO4 lasers at ~530nm. Laser designers are using Ti:sapphire to generate femtosecond pulses to create new industrial tools. A properly delivered femtosecond laser pulse interacts within the target leaving the surrounding area undisturbed. Newly developed femtosecond pulsed lasers micro-machine complex fine structures in glass, metal and other materials. Active waveguides can be written below the surface, integrating optical devices within the body of a substrate. Defects in photomasks can be repaired without disturbing neighbouring patterns. And it is now possible to achieve cellular resolution in vivo for medical diagnosis with femtosecond pulse lasers.

Read More
α-BBO (α-BaB2O4) birefringent crystals
a-BBO Crystal alpha -Barium Borate

α-BBO (α-BaB2O4) is a negative uniaxial crystal which has large birefringence over a broad transparent range of 190nm to 3500nm. α-BBO is an excellent crystal especially in UV and high power applications. The physical, chemical, thermal, and optical properties of alpha-BBO crystal are similar to those of Beta-BBO. However, there is no second order nonlinear effect in alpha-BBO crystal due to the centrosymmetry in its crystal structure and thus it has no use for second order nonlinear optical processes. Instead, alpha-BBO is widely used for fabrication of polarizers, polarizing beam displacers, phase retarders, birefringent plates, and time delay compensators especially those for UV and high power lasers.

Read More
YbYAG Crystals for DPSS lasers
Yb:YAG crystals Ytterbium Doped Yttrium Aluminum Garnet

YbYAG crystal is more suitable for diode-pumping than the traditional Nd-doped systems. It can be pumped at 0.94 μm laser output. Compared with the commonly used Nd:YAG crystal, Yb:YAG crystal has a much larger absorption bandwidth to reduce thermal management requirements for diode lasers, a longer upper-state lifetime, three to four times lower thermal loading per unit pump power. Yb:YAG crystal is expected to replace Nd:YAG crystal for high power diode-pumped lasers and other potential applications.

Read More
KDP & DKDP/KD*P Crystal
KDP & DKDP Crystal Potassium Dihydrogen Phosphate and Potassium Dideuterium Phosphate

KDP Potassium Dihydrogen Phosphate and KD*P or DKDP Potassium Dideuterium Phosphate are among the most widely-used commercial NLO materials, characterized by good UV transmission, high damage threshold, and high birefringence, though their NLO coefficients are relatively low. They are usually used for doubling, tripling and quadrupling of a Nd:YAG laser under the room temperature. In addition, they are also excellent electro-optic crystals with high electro-optic coefficients, widely used as electro-optical modulators, such as Q-switches, Pockels Cells, etc.

Read More
HoYLF laser crystal
Ho:YLF crystal Holmium-doped Yttrium Lithium Fluoride

HGO grows Ho:YLF laser crystals using Czochralski technology. Ho:YLF is a very attractive laser material, because the lifetime of the upper laser level is much longer ( ~ 14 ms) than in Ho:YAG and the emission cross sections are higher. Additionally the thermal lens in Ho:YLF is much weaker, which helps to generate diffraction limited beams even under intense end-pumping. The primary advantage of directly pumping the Ho 5I7 is that it does not have to depend on energy transfer, which lends itself to various radiative and non-radiative losses. Up-conversion losses that have deleterious effect in high-energy Q-switched lasers are eliminated.

Read More
Leave A Message
Leave A Message
If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.

Home

Products

about

contact