Abstract:
In this study 3 types of materials
selected: lead sulfate
(PbSO4),zinc sulfide (ZnS), mixture of lead sulfate (PbSo 4)
and zinc sulfide (ZnS) and antimony trioxide (Sb 2O3),which
undergoes spectroscopical analysis using FT-IR spectrometer
before and after irradiation by different wavelengths (810,
820, 1064) nm in IR region. Selected materials divided into
four groups, five discs (D=1.4cm) were manufactured from
each group by using pressing machine. Incident intensity (I 0)
and transmitted intensity (I) through materials measured
using three laser sources (diode laser �=810nm P=100mW,
diode
laser
�=820nm
P=200mW
and
Nd:
YAG
laser
�=1064nm P=10W),Laser sources used to irradiate the
materials
then
incident
intensity
(I 0)
and
transmitted
intensity detected by photoelement and then readout using
digital
multimeter.The
relation
between
the
ratio
of
transmitted to incident intensity (I/I 0) and thickens has been
plotted and absorption coefficient determined. The results
showed that lead sulfate (PbSO 4) has absorption coefficients
(0.01258, 0.05352, 0.03617) cm-1 for wavelengths (810, 820,
1064) nm respectively. (PbSO4) can be used to fabricate filter
at wavelengths (810, 1064) nm with high efficiency. Zinc
sulfide (ZnS) has absorption coefficients (0.05624, 0.04155,
0.07421)
cm-1
for
wavelengths
(810,
820,
1064)
nm
respectively. (ZnS) can be used to fabricate attenuator at
wavelength (1064) nm with high efficiency, also can be used
to fabricate filter at wavelength (820) nm, with moderate
efficiency. Mixture of lead sulfate (PbSo 4) and Zinc sulfide
(ZnS) has absorption coefficients (0.05331, 0.03874, 0.0847)
cm-1 for wavelengths (810, 820, 1064) nm respectively. This
material can be used to fabricate attenuator at wavelength
(1064) nm with high efficiency; also can be used to fabricate
filter at wavelength (820) nm with moderate efficiency. The
antimony
trioxide
(Sb2O3)
(0.03495, 0.05905, 0.04496)
has
absorption
coefficients
cm-1 for wavelengths (810,
820, 1064) nm respectively. (Sb2O3) can be used to fabricate
filter at wavelength (810) nm with high efficiency.
