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Ti:Sapphire Crystal  

 

Titanium-doped sapphire (Ti:sapphire) crystals combine supreme physical and optical properties with broadest lasing range. It's indefinitely long stability and useful lifetime added to the lasing over entire band of 660-1050 nm challenge "dirty" dyes in variety of applications. 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.
 
 
We have successfully produced large-sized (Dia.120x80mm) Ti:Sapphire by using the growth method of Temperature Gradient Technique (TGT). TGT is characterized by the capabilities of growing (0001) oriented sapphire with high doping level (a490=7.5cm-1) high gain, and high laser damage threshold. Pulsed, quasi-cw, cw, ps and fs lasing with high efficiency have been realized using TGT grown Ti: Sapphire. It can also meet current application such as in large aperture amplifiers for high power generation and laser fusion etc.
 
Basic Properties:
Chemical formula:
Ti3+: Al2O3
Crystal structure:
Hexagonal a=4.758, c=12.991
Density:
3.98 g/cm3
Melting point:
2040oC
Mohs hardness:
9
Thermal conductivity:
52 W/m/k
Laser action:
4-Level Vibronic
Fluorescence lifetime:
3.2m s (T=300K)
Tuning range:
660 - 1050 nm
Absorbtion range:
400 - 600 nm
Emission peak:
795 nm
Absorption peak:
488 nm
Refractive index:
1.76 @ 800 nm

 

Ti:Sapphire’s specifications:

Orientation:
Optical axis C normal to rod axis
Ti2O3 concentration:
0.06 - 0.5wt %
Figure Of Merit:
>250
End configurations:
Flat/Flat or Brewster/Brewster ends
Flatness:
Lambda /10 @ 633 nm
Parallelism:
5 arc sec
Surface finishing:
10/5 scratch/dig to MIL-O-13830A
Wavefront distortion:
Lambda /4 per inch
Note: AR Coating is available on request.

   
 

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