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Jiaxing AOSITE Photonics Technology Co.,Ltd.
nd ylf
nd ylf

Nd: YLF Laser Crystals

OST Photonics grows Nd:YLF laser crystals using Czochralski technology. Nd3+:YLF crystal is characterized by its long lifetime of 4F3/2 neodymium energy level. Compared to Nd:YAG, the lower thermal conductivity and a weak negative dn/dT lead to lower thermal distortions and allow to achieve a better output beam quality. Another distinctive feature is the high UV transparency, which is favorable for pumping with xenon flash lamps.


Advantages of Nd YLF Laser Crystals


  • High power, low beam divergence, effective single-mode operation

  • High average power Q-switching at a moderate repetition rate

  • Linear polarized resonators for Q-switching and frequency doubling

  • Potential uniform mode for large diameter rods or slabs

  • Stimulated emission cross section is favorable for low CW threshold

  • 1053nm output of Nd: YLF matches gain curves of Nd: Glass and performs well as an oscillator and pre-amplifier for this host


Applications of Nd YLF Laser Crystals


  • Ophthalmology

  • Mode-locked laser

  • CW laser


Specifications of Nd YLF Laser Crystals


Doping(at%):

0.01%~3%

Orientation:

A-cut or C-cut

Wavefront Distortion:

λ/8 per inch @ 632.8 nm

Dimension Tolerances:

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

Surface Quality:

10/5 Scratch/Dig MIL-O-1380A

Parallelism:

<10″

Perpendicularity:

<5′

Clear Aperture:

>90%

Surface Flatness:

<λ/10 @ 632.8 nm

Chamfer:

<0.1 mm @ 45°

Barrel Finish

50-80 micro-inch (RMS)

Size

Upon customer request

Coating

AR/HR/PR coating upon customer’s request

Damage Threshold

750MW/CM2 at 1064nm, TEM00, 10ns, 10Hz

Quality Warranty Period

One year under proper use

Other YLF-based Pr/Ho/Tm/Yb/Er/Ce YLF can be provided upon request as well.


Optical Properties of Nd YLF Crystal


Transparency Range

180-6700nm

Absorption peak wavelength

792 nm

Peak Absorption Coefficient(for 1.2% Nd)

α= 10.8cm-1 (792.0 nm E∥c)
α= 3.59cm-1 (797.0 nm E⊥c)

Absorption bandwidth at peak wavelength

~5 nm

Peak Stimulated Emission Cross Section

1.8x10^-19/cm2(E∥c) at 1047nm
1.2x10^-19/cm2(E⊥c) at 1053nm

Spontaneous Fluorescence Lifetime

485 µs for 1% Nd doping

Scatter Losses

<0.2%/cm

Laser Wavelength

1047nm (∥c, a-cut crystal)
1053nm(⊥c, a or c-cut crystal)


Physical Properties of Nd YLF Crystal


Chemical Formula

LiY 1.0-x Nd x F4

Space Group

I41/a

Nd atoms/cm3

1.40x10^20 atoms/cm3 for 1% Nd doping

Modulus of Elasticity

85 GPa

Crystal Structure

Tetragonal

Cell Parameters

a=5.16 Å , c=10.85 Å

Melting Point

819℃

Mohs Hardness

4~5

Density

3.99 g/cm3

Thermal Conductivity

0.063 W/cm/K

Specific Heat

0.79 J/g/K

Thermal Expansion Coefficients

8.3x10^-6/k∥c
13.3x10^-6/ k⊥c

dn/dT

-4.6x10^-6 (||c) K-1, -6.6x10^-6 (||a) K-1


Contact Us
Welcome your presence, you can send us an email, we will get in touch with you within 24 hours.
Head Office: No. 66, 8 Group, Chengbei Village, Yanguan Town, Jiaxing 314411, China;

Hangzhou Branch: Room 1012, Chunhua Bussiness Center, No. 159, Hangbo Street, Shangcheng District, Hangzhou 310009, Zhejiang, China
Head Office: No. 66, 8 Group, Chengbei Village, Yanguan Town, Jiaxing 314411, China;

Hangzhou Branch: Room 1012, Chunhua Bussiness Center, No. 159, Hangbo Street, Shangcheng District, Hangzhou 310009, Zhejiang, China
sales@ostphotonics.com; info@ostphotonics.com +86-0571-86780460