|
Titanium-doped
Sapphire Crystal (Ti:Sapphire)
Titanium-doped
sapphire crystals combine
supreme physical and
optical properties with
broadest lasing range.
Ti:Sapphire
crystal is indefinitely
long stability and useful
lifetime added to the
lasing over entire band of
660–1050 nm
challenge “dirty” dyes
in variety of
applications. It is the
most widely used laser
crystal for widely tunable
and ultrashort pulsed
lasers with high gain and
high power outputs.
Medical laser systems,
lidars, laser
spectroscopy, direct
femtosecond pulse
generation by Kerr-type
mode-locking – there
are few of existing and
potential applications. |
|
The absorption band of Ti:Sapphire
centered at 490 nm makes it
suitable for variety of laser pump
sources – Argon Ion,
Frequency Doubled
Nd:YAG and YLF, Copper Vapour
lasers. Because of 3.2 μs
fluorescence lifetime Ti:Sapphire
crystals can be effectively pumped
by short pulse flashlamps in
powerful laser systems.
Using
advanced growth method of
Temperature Gradient Technique (TGT),
AOTK supplies large-sized
(Dia.125x 80mm) Ti:Sapphire
crystal in high quality free of
light scatter, with the
dislocation density less than
102cm-2. The TGT grown
sapphire crystal is advantages by
the (0001) oriented growth, high
doping level (a490
= 7.5cm-1), high gain
and laser damage threshold.
Ti:Sapphire crystals of highest
optical quality, figure of merit
and different doping levels are
routinely available from AOTK.
Physical
and Laser Properties
| Chemical
Formula |
Ti3+:Al2O3 |
|
Crystal
Structure
|
Hexagonal
|
| Lattice
Constants |
a
= 4.758Å, c =
12.991Å |
|
Density
|
3.98
g/cm3
|
| Mohs
Hardness |
9 |
|
|
0.11
cal/(cm x sec x °C)
|
|
|
8.40
x 10-6/°C
|
|
Specific
Heat
|
0.10
cal/g
|
|
Heat
Capacity
|
18.6
cal/°C-mole
|
| Melting
Point |
2050°C |
| Laser
Action |
4-Level
Vibronic |
| Fluorescence
Lifetime |
3.2
µs (T = 300K) |
|
Peak
Cross-section
|
3~4
x 10-19
|
|
Tuning
Range
|
660-1050
nm
|
| Absorption
Range |
400-600
nm |
| Emission
Peak |
795
nm |
| Absorption
Peak |
488
nm |
| Absorption
Coefficient (α) |
1.0-7.5
cm-1 |
| Refractive
Index |
1.76
@ 800 nm |
Standard Specifications
| Ti2O3
Concentrations |
0.06-0.5
wt% |
| Orientation |
Optical
axis C normal to rod axis |
|
Figure
of Merit (FOM)
|
> 150
(> 300 available
on special requests)
|
|
Wavefront
Distortion
|
<λ/4
inch
|
|
Typical
End Configurations
|
Brewster/Brewster
or Flat/Flat
|
|
Surface
Finish
|
10/5
scratch/dig as per
MIL-O-13830A
|
|
Flatness
|
λ/10
@632.8 nm
|
| Parallelism |
<
10 arc seconds |
|
