OST Photonics Nd: YLF Laser Crystals

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

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)

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