Production and service Thallium and silver halogenides Monocrystals of TlCl - TlBr and TlBr - TlJ solid solutions of flexible composition

Monocrystals of TlCl - TlBr and TlBr - TlJ solid solutions of flexible composition

Application:
Optical elements having variable radial refractivity gradient for IR radiation focusing and collimating. Billets for graded index polycrystalline IR fiber production.

Optical properties:

Spectral transmission band, mcm	0,4 - 50
Spectral transmission coefficient,%
at wave length of 0,63 mcm	55 - 65
in wave length range of 2,5 - 25 mcm	68 - 70
Coefficient of laser emission volumetric absorption at wave length of 5-6 and 10,6 mcm, cm^-1	5·10^-4
Gradient element size,mm
diameter	1,5 - 5,0
length ( ? = 0,63 , L = 1/4 )	10 - 15
Focal spot diameter, mcm	10 - 12
Numerical aperture, NA = sin Ø	0,4 - 0,6
Maximum refractive index difference, À n	0,08 - 0,09
Radial distribution of refractive index	close to parabolic
Sizes of graded index billets for optical fibers
diameter, mm	1 - 15
length, mm	30 - 80

Diagram of ray propagation in “grin” 1/4 L long

TlBr-TlCl (1) and TlBr-TlJ (2) gradient monocrystal transmission spectrum