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Nd:YLF

Unioriental grows Nd,Pr,Er,Ho and no doped YLF crystals using the Czochralski technique. The use of high quality starting materials for crystal growth , whole boule interferometry and precise measurement of bulk losses using tranmission spectroscopy assures that each crystal will perform to customer specifications.

 

 

Capabilities

1. Dopant concentrations between 0.5 and 3.0mol%; 

2. Rod sizes from 1mm to 25.4mm in diameter and from 1mm to 180mm in length; 

3. Large rod and slab dimensions and non-standard dopant concentrations are   

available upon request; 

4. AR, HR and HT coating are available upon request; 

5. Orientation of rod axis to crystal a-axis or c-axis within 2 degrees. 

 

Specifications

Dopant Concentration Tolerance--------0.1%

Parallelism ------<10 arc seconds

Perpendicularity ---------<5 arc minutes

Chamfer------------0.1mm @45°

Clear Aperture-----95%

Surface Quality-------10/5

Surface Flatness--------λ/10 @ 633nm

Wavefront Distortion----<7mm diameter:@ 633nm

≥7mm diameter: λ/8@633nm

Damage Threshhold--------over 15J/CM2 TEM00, 10NS, 10HZ

 

Physical Properties

Chemical Formula

LiY1.0-× Nd×F4

Lattice Parameters

a=5.16; c=10.85

Crystal structure

tetragonal

Space Group

141/a

Nd atoms/cm3

1.40×1020 atoms/cm3 For 1% Nd doping

Knoop hardness

300kg /mm 2

Melting Point

819°C

Density

3.99g /cm3

Modulus of Elasticity

85GPa

Thermal Expansion

8.3×10-6/k along c axis

Coefficient

13.3×10-6/k along c axis

Thermal Conductivity

0.063 W/cm K

Specific Heat

0.79 J/g K

 

Optical Properties

Transparency Region

180nm to 6.7µm

Peak Stiulated Emission

1.8×10-19cm2 (E || C) at 1.047mm

Cross Section

1.2×10-19cm2 (E ⊥ C) at 1.053mm

Spontaneous Fluorescence

485µs for 1% Nd

Scatter Losses

<0.2%/cm

Peak Absorption Coefficient

α＝10.8cm-1 (792.0 nm E || C)

(for 1.2% Nd)

α＝3.59cm-1 (797.0 nm E ⊥ C)

Sellmeier Equation

 

dN/dT

Wavelength

E|| c

E⊥c

436 mm

-2.44×10-6 /°C

-0.54×10-6 /°C

578nm

-2.86×10-6 /°C

-0.91×10-6 /°C

1.06 µm

-4.30×10-6/°C

-2.00×10-6 /°C

 

Index of Refraction

Wavelength

n°

ne

262

1.485

1.51

350

1.473

1.49

525

1.456

1.479

1050

1.488

1.470

2065

1.442

1.464

 

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Ante Laser Technology Co.,Ltd

Add：Floor 2,Building F, Guangdong Soft-park #7 Caipin Rd, Science Town, Guangzhou 510635, PR China