Recently, the rapid growth in photonic field has increased the demand for nonlinear materials with higher performance and greater efficiency. Hence, a thorough investigation on the nonlinear optical properties of materials are essential and need to be done for possible future application of the material in photonic field as optical limiting or optical switching devices. Thus, through this research, the crucial parameters in nonlinear optical properties of zinc borotellurite glasses doped with lanthanum oxide and lanthanum nanoparticles were studied and investigated extensively. The two series of glasses were successfully fabricated via conventional melt-quenching technique. The fabricated samples were characterized by using Fourier Transform Infra-Red (FTIR) spectroscopy as well as Z-scan technique in order to study the structural and nonlinear optical properties of the glass systems. The existence of various amount of TeO₄, TeO₃, BO₄ and BO₃ in all the prepared glasses are proven through the observable absorption bands in the FTIR spectra. Inconsistent trends recorded for both nonlinear absorption coefficient and nonlinear refractive index might be associated with the simultaneous creation of bridging as well as nonbridging oxygen which eventually affect the values for both parameters. The figure of merit of the prepared glasses with values ranging from 0.055 to 0.267 which are smaller than one hints that the glass materials possess potential to be employed as all optical devices. 0.03 M fraction of lanthanum nanoparticles doped zinc borotellurite with FOM value larger than 1 has proven the ability of the respective glass to be employed as efficient all optical switching devices. The determined nonlinear optical parameters of the glasses should be able to provide sufficient and useful information on the fabricated glass samples for future application in photonic field.

近来，光子领域的快速发展增加了对具有更高性能和更高效率的非线性材料的需求。因此，对材料的非线性光学性质的彻底研究是必不可少的，并且需要进行进一步研究，以使材料在光子领域中作为光学限制或光学开关装置的未来可能应用。因此，通过本研究，对氧化镧和纳米镧掺杂的硼锌锌玻璃的非线性光学性能中的关键参数进行了研究和广泛研究。通过常规的熔融淬火技术成功地制造了两个系列的玻璃。为了研究玻璃系统的结构和非线性光学特性，使用傅立叶变换红外（FTIR）光谱和Z扫描技术对制备的样品进行了表征。各种数量的TeO的存在₄，TeO ₃，BO ₄和BO ₃通过FTIR光谱中可观察到的吸收带证明了所有制备好的玻璃的性能。记录的非线性吸收系数和非线性折射率的不一致趋势可能与同时产生桥联和非桥联氧有关，这最终会影响两个参数的值。所制备的玻璃的品质因数的值在0.055至0.267的范围内，其小于一个暗示玻璃材料具有用作所有光学器件的潜力。已证明FOM值大于1的0.03 M分数的镧纳米粒子掺杂的硼锌酸锌锌已被证明具有将各种玻璃用作有效的所有光学开关装置的能力。