14 / 16
Page 41
allied
academies
August 23-24, 2018 | Paris, France
Laser, Optics and Photonics
International Conference on
Journal of Materials Science and Nanotechnology | Volume: 2
Laser action in rare earth doped Borosilicate glasses in visible and NIR Region
Yogesh Kumar Sharma, Priyanka Goyal
and
Neha Arora
Kumaun University, India
T
he rare earth doped Borosilicate glasses have been
prepared by standard techniques. The prepared glass
samples have been characterized by XRD, SEM, EDAX, FTIR
and TEM. FTIR gives the information about the borate
network which lies in the wavelength region 650 - 1700 cm
-1
and further verified by the TEM image. The fluorescence
spectra were recorded in visible and NIR region. Laser
parameters have been computed with help of absorption
and fluorescence spectra. CIE Chromaticity diagram have
been given in this paper for measuring the colour of vision
that the human eye perceives and verifies the results of
fluorescence spectrum. Pr
3+
ion gives emission in the blue
region and most probable transition for Pr
3+
doped glasses
are
3
P
o
→
3
H
4.
Three laser transitions are observed for Nd
3+
ion viz
4
F
3/2
→
4
I
9/2, 11/2, 13/2
among which the strongest laser
transition is
4
F
3/2
→
4
I
11/2
. Nd
3+
ion gives red colour emission
and lies in the red region of the chromaticity diagram. Sm
3+
ion gives orange red emission and lies in the orange red
region of Chromaticity diagram. The
4
G
5/2
→
6
H
7/2
transition
is suitable for reddish – orange laser transition for Sm
3+
ion. Er
3+
ion gives green colour emission which is used for
photonic applications. The suitable laser transition for Er
3+
is
4
S
3/2
→
4
I
15/2
and this transition is perfect for green lasers.
e
: dryksharma@yahoo.com