|
Broadband,Inc.
〒121-0832
東京都足立区
古千谷本町4-7-9
お問い合わせ
TEL:03-5838-0082
ask@bblaser.com |
| |
|
|
●
Nd:Ce:YAG |
|
|
|
Abal
OptoTek社 (AOTK)
|
|
|
Neodymium
and Cerium doped Yttrium Aluminium Garnet
Crystal
(Nd:Ce:YAG)
Nd:Ce:YAG
crystal is an excellent
laser material used for
no-water cooling and
minatura laser system. In
double doped Nd:Ce:YAG
crystals Cerium are chosen
as sensitizer for Nd3+
ions because of its strong
absorption in UV spectral
region at flash lamp
pumping and efficient
energy transfer to the
Nd3+ excited state.As a
result - thermal
distortion in Nd:Ce:YAG is
appreciably less and the
output laser energy is greater
than that in Nd:YAG at the
same pumping. Therefore
it is possible to realize
high power lasers with
good beam quality. Lasing
wavelength at 1064 nm,
laser damage |
|
threshold
and thermal conductivity of the
Nd:Ce:YAG crystals are the same as
for Nd:YAG.
Advantages of Nd:Ce:YAG Crystals
●
Ultra
compact
●
Low
threshold
●
Very
high slope efficiency
●
Good
anti-UV irradiation property
●
Good
thermal stability
●
High optical quality
Basic Properties
|
Crystal
Structure
|
Cubic
|
|
Lattice
Parameters
|
12.01
Å
|
|
Mohs
Hardness
|
8.5
|
|
Melting
Point
|
1950°C
|
|
Density
|
4.55
g/cm3
|
|
Specific
Heat
|
0.59J/g.cm3
|
|
Modulus
of Elasticity
|
310GPa
|
|
Thermal
Optical Coefficient
(dn/dt)
|
7.3
x 10-6 /°C
|
|
Thermal
Conductivity
|
14
W/m/K at 20°C,
10.5 W/m/K at 100°C
|
|
Thermal
Expansion Coefficient
|
8.2
x 10-6°C-1
[100], 7.7 x 10-6°C-1
[110], 7.8 x 10-6°C-1
[111]
|
|
Thermal
optical Coefficient (dn/dT)
|
7.3
x 10-6 °C-1
|
|
Thermal
Shock Resistance
|
790W/m
|
OPtical
and Special Properties
|
Dopant
Concentration
|
Nd:
1.1 ~ 1.4at%, Ce: 0.05
~ 0.1at%
|
| Lasing
System |
Four
Level |
| Lasing
Upper State |
4F3/2 |
|
Laser
Wavelength
|
1064
nm
|
|
Photon
Energy
|
1.86×10
-19 J@
1064nm
|
| Fluorescent
Lifetime
(Nd
1at%) |
230
μs |
|
Emission
Linewidth
|
4.5Å
@1064nm
|
|
Emission
Cross Section (Nd
1at%)
|
2.7~8.8
x 10-19 cm2
|
|
Refractive
Index
|
1.82
@1064 nm
|
Standard
Specifications
| Orientation |
[111]
within ±
5° |
| Wavefront
Distortion |
≤
0.2λ/inch |
| Extinction
Ratio |
≥28
dB |
|
Rod
Sizes
|
Diameter:
3~6mm, Length: 40~80mm
|
|
Dimensional
Tolerances
|
Diameter:
+0.00/-0.05mm,
Length
+0.5/-0.2 mm
|
|
Flatness
|
λ/10
@633 nm
|
|
Parallelism
|
<
10 arc seconds
|
|
Perpendicularity
|
<
5 arc minutes
|
|
Surface
Quality
|
10/5
Scratch/Dig per
MIL-O-13830A
|
|
Barrel
Finish
|
50
- 80 micro-inch (RMS)
|
|
Chamfer
|
0.006"±0.002"
at 45°± 5°
|
|
Clear
Aperture
|
>
Central 90%
|
| AR
Coatings |
R
< 0.10% @1064 nm per
surface |
|
|
|
|
AOTK紹介ページへ戻る▲
取扱製品一覧へ戻る▲
|
|
|
|
