Laser action in rare earth doped Borosilicate glasses in visible and NIR Region
International Conference on Laser, Optics and Photonics
August 23-24, 2018 | Paris, France
Yogesh Kumar Sharma, Priyanka Goyal and Neha Arora
Kumaun University, India
Posters & Accepted Abstracts : Mater Sci Nanotechnol
The 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. Pr3+ ion gives emission in the blue region and most probable transition for Pr3+ doped glasses are 3Po → 3H4. Three laser transitions are observed for Nd3+ ion viz 4F3/2→4I9/2, 11/2, 13/2 among which the strongest laser transition is 4F3/2→4I11/2. Nd3+ ion gives red colour emission and lies in the red region of the chromaticity diagram. Sm3+ ion gives orange red emission and lies in the orange red region of Chromaticity diagram. The 4G5/2 → 6H7/2 transition is suitable for reddish – orange laser transition for Sm3+ ion. Er3+ ion gives green colour emission which is used for photonic applications. The suitable laser transition for Er3+ is 4S3/2→4I15/2 and this transition is perfect for green lasers.