Ti : Sapphire
 

 


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

 

 

 

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:

1/10 lambda @ 633 nm

Parallelism:

10 arc sec

Surface finishing:

10/5 scratch/dig to MIL-O-13830A

Wavefront distortion:

1/4 lambda per inch

 

Note: AR Coating is available on request

 

 

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