Conventional material removal of BK7 optical glass will normally result in brittle fracture at the surface, generating severe subsurface damage and poor surface finish. Subsurface damages induced by grinding strongly influence the mechanical strength and optical quality of optical glasses. However, through ductile mode grinding it is possible to reduce the surface and subsurface cracks. It is m...

Mn(II) doped P2O5-ZnO-CaO glasses are being characterized by techniques like XRD, UVVisible and different physical properties. XRD patterns in present glasses have confirmed the amorphous nature of glass samples. The optical absorption spectrum exhibited three bands which are characteristic of Mn(II) in distorted octahedral site symmetry., The density is one of the tools to reveal the degree of...

A variety of oxide glasses and glass-ceramics that contain thermally or optically developed nanostructures will be described along with the properties that derive from the nano-phase, or structural rearrangement. The derived properties include photosensitive, photochromic, photoadaptable color, photorefractive (induced refractive index), photo-machinable, and polarizing.

In particular, chalcogenide glasses and glass-ceramics are new materials that exhibit good transparency in infrared region (0.8-12µm). We can overcome the main weakness of these glasses by improving the hardness through controlling crystallization. In this paper, we report results of a study on chalcogenide glasses in the ternary system of As-Se-Ge with nominal composition of Snx (Se...

Chalcogenide glasses are based on sulfur, selenium and tellurium elements, and have been studied for several decades regarding different applications. Among them, selenide glasses exhibit excellent infrared transmission in the 1 to 15 µm region. Due to their good thermo-mechanical properties, these glasses could be easily shaped into optical devices such as lenses and optical fibers. During the...

*Correspondence: Guoping Dong and Jianrong Qiu, State Key Laboratory of Luminescent Materials and Device, School of Materials Science and Engineering, South China University of Technology, Wushan Road 381, Tianhe District, Guangzhou, Guangzhou 510640, China e-mail: [email protected]; [email protected] Quantum dot (QD)-doped glasses have been the hotspot for their excellent electronic and optical pr...

Borosilicate BK7 glasses doped with different amounts of CeO2 (0.5,1,1.5%) were prepared by the convenient melting process in this work. DTA analysis proved that 0.5-1% CeO2 has a network modifier role and then up to 1.5% it shows network former role.For structural studies, FT-IR and Raman spectroscopy were carried out. Fermi energy level, direct/ indirect optical band gap and Urbach energy wer...

Surface roughness is a significant parameter which determines the efficiency of optical components. Surface damages induced by grinding strongly influence the mechanical strength and optical quality of optical glasses. It is meaningful to rapid evaluate the surface roughness through the measurement of different grinding parameters. In this study, a cup diamond wheel (D64) is used in grinding pr...

Surface roughness is a significant parameter which determines the efficiency of optical components. Surface damages induced by grinding strongly influence the mechanical strength and optical quality of optical glasses. It is meaningful to rapid evaluate the surface roughness through the measurement of different grinding parameters. In this study, a cup diamond wheel (D64) is used in grinding pr...

We have studied the third order optical nonlinearities of Ge-As-Se-based glasses. The glasses have high melting and glass transition temperatures that offer the potential for integration with traditional compound oxide glasses into highly nonlinear, high-index-contrast fibers. We used z-scan and femtosecond pump-probe techniques to measure the nonlinear refractive index and two-photon absorptio...