:

KRS-5 monocrystals (TlBr-TlI)

Application:
Optical elements for devices used in infrared technology, acoustooptics, laser technology, billets for optical fibers production.

  

Optical properties:

 

Transmission band, mcm 0,56 - 52
Spectral transmission coefficient,%  
at wave length of 0,63 mcm 55
at wave length of 2 - 25 mcm 68
Refractive index in wave length range of 0,63 - 10,6 mcm 2,57 - 2,37
Optical homogeneity at wave length of 0,63 mcm 2 ·10-5
Coefficient of laser emission volumetric absorption at wave length of 5-6 and 10,6 mcm, cm-1 1÷5 ·10-4

 

Physical properties:

 

Density (20 -25оС), g/cm3 7,371
Melting temperature, оС 412
Coefficient of thermal expansion (-50 - +100 оС), 106 degree-1 61-58
Heat resistance,оС 55-85
Knupp microhardness, kg/mm2 40,2

 

Acoustooptical properties:

 

Modulus of acoustooptic figure of merit М2, 1015 m2.sec3/kg 1150-1200

 

Chemical properties:

 

Composition, mass.%  
TlBr 57,5
TlI 42,5
Solubility, g/l 0,5

 

Size of delivered samples:

 

Diameter, mm 5-120
Thickness, mm 1-1005

 

Delivery capabilities:

 

In the form of boules, kg per month 10-20
In the form of ground windows, pieces per month 500
In the form of polished windows, pieces per month 100

 

Note:
Crystals are grown from TlBr and TlJ high purity salts by Stockbarger method in ampoules made of heat-resistant glass having diameter up to 50 mm, height up to 120 mm.

 

KRS-5 monocrystal transmission spectrum
spectr-krs5(2).jpg