Optical Properties of Tm3+ Ions in MO (M= Li, Na and K) – Al2O3 – P2O5 Glass Systems

  • P Raghava Rao
  • N Narasimha Rao Department of Physics, Krishna University Dr. MRAR PG Centre, Nuzvid
  • BJRSN Narasimha Swamy, Mr Department of Physics, Krishna University Dr. MRAR PG Centre, Nuzvid
  • A Chitti Narasimha Babu, Mr Department of Physics, Rajiv Gandhi University of Knowledge & Technologies, (AP-IIIT) Nuzvid.
  • N Ch. Ramesh Narasimha Babu, Mr Department of Physics, Rajiv Gandhi University of Knowledge & Technologies, (AP-IIIT) Srikakulam
  • T Raghavendra Narasimha Rao Department of Physics, Rajiv Gandhi University of Knowledge & Technologies, (AP-IIIT) Srikakulam
  • T Sambasiva Narasimha Rao Department of Physics, Rajiv Gandhi University of Knowledge & Technologies, (AP-IIIT) Srikakulam.
Keywords: Tm3 ions, UV-Vis absorption, J-O Theory, Luminescence, CIE Coordinates

Abstract

The Tm3+ ions doped 40 MO – 40 Al2O3 – 55 P2O5: 1.0 Tm2O3 (in mol %)
where M = Li, Na and K glasses are synthesized by conventional melt
quenching technique. The recorded optical absorption spectral profiles
of Tm3+ions MO–Al
2O3–P2O5Tm2O3 glasses have 3H6 ® 1G4, 3F2, 3F3, 3H4, 3H5,
3F
4. By performing least square fitting analysis the J-O parameters
for the three glass systems are computed and are found to W2 > W4
> W
6 . The luminescence spectra exhibited the bands 1D2 → 3F3, 3H5, 3F4
and 1G
4 → 3H6, 3F4, 3H5 , 3H4 → 3F4 and 3F4 → 3H6. The evaluated lifetimes
for the levels 1D
2 and 1G4 indicated the highest values for the K2O mixed
glasses. Laser transition is found to be the highest for the blue emission
due to 1G
4→3H6transition among other transitions. The comparison of
b value for this transition is found to be the highest for KTm glass. The
colour coordinates of Tm3+ ions glasses fall in the blue region.

Author Biographies

P Raghava Rao

Department of Physics, Krishna University Dr. MRAR PG Centre, Nuzvid

N Narasimha Rao, Department of Physics, Krishna University Dr. MRAR PG Centre, Nuzvid

Department of Physics, Krishna University Dr. MRAR PG Centre, Nuzvid

BJRSN Narasimha Swamy, Mr, Department of Physics, Krishna University Dr. MRAR PG Centre, Nuzvid

Department of Physics, Krishna University Dr. MRAR PG Centre, Nuzvid

A Chitti Narasimha Babu, Mr, Department of Physics, Rajiv Gandhi University of Knowledge & Technologies, (AP-IIIT) Nuzvid.

Department of Physics, Rajiv Gandhi University of Knowledge & Technologies, (AP-IIIT) Nuzvid.

N Ch. Ramesh Narasimha Babu, Mr, Department of Physics, Rajiv Gandhi University of Knowledge & Technologies, (AP-IIIT) Srikakulam

Department of Physics, Rajiv Gandhi University of Knowledge & Technologies, (AP-IIIT) Srikakulam

T Raghavendra Narasimha Rao, Department of Physics, Rajiv Gandhi University of Knowledge & Technologies, (AP-IIIT) Srikakulam

Department of Physics, Rajiv Gandhi University of Knowledge & Technologies, (AP-IIIT) Srikakulam

T Sambasiva Narasimha Rao, Department of Physics, Rajiv Gandhi University of Knowledge & Technologies, (AP-IIIT) Srikakulam.

Department of Physics, Rajiv Gandhi University of Knowledge & Technologies, (AP-IIIT) Srikakulam.

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Published
2020-07-04