International Journal in Physical and Applied Sciences Volume 08 Issue 11, November 2021 ISSN: 2394-5710 Impact Factor: 6.915 Journal Homepage: http://ijmr.net.in, Email: irjmss@gmail.com Double-Blind Peer Reviewed Refereed Open Access International Journal 9 International Journal in Physical and Applied Sciences http://ijmr.net.in, Email: irjmss@gmail.com SPECTRAL AND TRANSMITTANCE PROPERTIES OF TM 3+ DOPED IN ZINC LITHIUM LEAD TUNGSTEN ANTIMONY BOROPHOSPHATE GLASSES S.L.Meena Ceramic Laboratory, Department of physics, Jai Narain Vyas University, Jodhpur 342001(Raj.) India E-mail address:shankardiya7@rediffmail.com Abstract Glass sample of Zinc Lithium Lead Tungsten Antimony Borophosphate: (30-x) P 2 O 5 :10ZnO:10Li 2 O:10PbO:10WO 3 :10Sb 2 O 3 :20B 2 O 3 :xTm 2 O 3. (where x=1,1.5 and 2 mol%) have been prepared by melt-quenching technique. The amorphous nature of the prepared glass samples was confirmed by X-ray diffraction. Optical absorption, Transmittance and fluorescence spectra were recorded at room temperature for all glass samples. Judd-Ofelt intensity parameters Ω λ (λ=2, 4 and 6) are evaluated from the intensities of various absorption bands of optical absorption spectra. Using these intensity parameters various radiative properties like spontaneous emission probability, branching ratio, radiative life time and stimulated emission cross–section of various emission lines have been evaluated Keywords: ZLLTABP Glasses, Optical Properties, Judd-Ofelt Theory, Transmission Properties. I. Introduction Rare earth doped glasses have potential applications for solid state lasers, sensors, non-linear devices, optical fiber amplifiers , waveguide lasers, frequency-conversion materials and optical fiber amplifiers[ 1- 5].Oxide glasses are the most stable host matrices for practical applications due to their high chemical durability and thermal stability[6-8]. Among all oxide glasses, phosphates have received more interest because their high rare earth ions solubility, thermal stability, optical stability, low phonon energy and consequently clustering reduction. The low phonon energy of the fluorophosphates glasses yields low non-radiative decay and high radiative emission rates of rare earth ion energy levels. Phosphate glasses exhibit high transparency, high refractive index, low melting temperature, good thermo optical performance and good chemical durability [9-14]. Recently phosphate based glasses have a wide range of potential applications in optical data transmission, detection, sensing and laser technologies [15-20]. The present work reports on the preparation and characterization of rare earth doped heavy metal oxide (HMO) glass systems for lasing materials. I have studied on the absorption, transmittance and emission properties of Tm 3+ doped zinc lithium lead tungsten antimony borophosphate glasses. The intensities of the transitions for the rare earth ions have been estimated successfully using the Judd-Ofelt theory.The laser parameters such as radiative probabilities(A),branching ratio (β), radiative life time(τ R ) and stimulated emission cross section(σ p ) are evaluated using J.O.intensity parameters( Ω λ , λ=2,4 and 6). II. Experimental Techniques Preparation of glasses The following Tm 3+ doped borophosphate glass samples (30-x) P 2 O 5 :10ZnO:10Li 2 O:10 PbO:10WO 3 :10Sb 2 O 3 :20B 2 O 3 :xTm 2 O 3. (where x=1,1.5 and 2 mol%) have been prepared by melt- quenching method. Analytical reagent grade chemical used in the present study consist of P 2 O 5 , ZnO, Li 2 O, PbO, WO 3 , Sb 2 O 3 ,B 2 O 3 and Tm 2 O 3 . They were thoroughly mixed by using an agate pestle mortar.