Cr4+:YAG
Passive Q-switching is
preferred for simplicity of manufacture and operation, low cost and reduced
system size and weight. Cr4+:YAG is an excellent crystal for passively
Q-switching diode pumped or lamp-pumped Nd:YAG, Nd:YLF, Yb:YAG or other Nd and
Yb doped lasers at wavelength from 1.0 to 1.2um.
Advantages
l High power laser pulses
without electro-optic Q-switches
l Good thermal conductivity
l High damage threshold
l More robust and stable than
dyes or color centers
Specifications
|
Material
|
Cr 4+:YAG
|
|
Orientation
|
<111> or <110> or <100>
|
|
Initial
absorption coefficient
|
0.5-7/cm@1064nm
|
|
Diameter
tolerance
|
Diameter:+0/-0.02mm,
W×H:+/-0.1mm
|
|
Length
tolerance
|
+/-0.5mm
|
|
Initial
transmittance
|
5%-95%@1064nm
|
|
Dimension
|
Diameter:3-12mm,
H×W:2×2-30×30mm(upon customer’s request)
|
|
Barrel
finish
|
Ground
finish 400#Grit
|
|
Clear
aperture
|
>90%
central area
|
|
Parallelism
|
<10
arc seconds
|
|
Perpendicularity
|
<5 arc minutes
|
|
Flatness
|
<λ/8@632.8nm
|
|
Scratch/Dig
|
10/5@MIL-0-13830A
|
|
Anti-Reflection
coating
|
R<0.15%@1064nm
per surface
|
|
Damage
threshold
|
>750MW/cm2@1064nm
10ns 10HZ
|
Properties
|
Chemical Formula
|
Cr4+:Y3Al5O12
|
|
Crystal Structure
|
Cubic
|
|
Melting Point
|
1970°
|
|
Density
|
4.55g/cm3
|
|
Mohs hardness
|
8.5
|
|
Wavelength
|
950nm-1100nm
|
