Fabrication Applications of GRIN Materials

2012 ◽  
Vol 586 ◽  
pp. 215-220 ◽  
Author(s):  
Yu Lin Li ◽  
Bao Wen Hu ◽  
Zheng Quan He ◽  
Min Rui Zhang ◽  
Jun Min Huo ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Materials ◽  
Optical Glass ◽  
Refractive Index Profile ◽  
Gradient Index ◽  
Index Profile ◽  
Medical Endoscope ◽  
Exchange Method ◽  
Fiber Communications ◽  
Ion Exchange Method

In recent years, a series of gradient index (GRIN) materials including Optical glass and polymer have been Research and developed in our laboratory. The Micro-lenses and arrays with the special optical materials also have been fabricated mainly by using Ion-exchange method through refractive index profile, which are applied to micro-optic devices and other applications—— especially in the coupled and connected devices for fiber communications and medical endoscope or they are used primarily for document scanning equipments.

scholarly journals Producibility of the ion-exchange method in manufacturing gradient refractive index in glass

2014 ◽  
Vol 62 (4) ◽  
pp. 655-665 ◽  
Author(s):  
R. Rogoziński
Keyword(s):  
Refractive Index ◽  
Ion Exchange ◽  
Diffusion Processes ◽  
Three Dimensional ◽  
Refractive Index Profile ◽  
Equation Modeling ◽  
Exchange Method ◽  
Ion Exchange Method ◽  
Gradient Refractive Index ◽  
Spatio Temporal

Abstract This paper presents the technological aspect of application of the ion exchange method in producing gradient refractive index in glass. The possibility of predictable and repeatable producing of the changes in glass refraction with the use of this method has been presented, as well as the method of in situ control of the process of diffusion doping of glass based on the measurement of the temperature. This method is based on simultaneous (to the carried process) solving the nonlinear diffusion equation modeling the spatio-temporal changes in normalized concentration of the admixture ions in glass. For this purpose the knowledge of temperature characteristics of diffusion coefficients of exchanged ions is used. The result of such control of diffusion processes is information on the current (temporary) refractive index profile of the resulting waveguide. The presented method of control has been confirmed by experimental results, which concern modeling and measurements of planar waveguide structures of slab type. The proposed methodology can also be used to control the diffusion processes of producing another type of two- and three-dimensional gradient structures. According to the author’s knowledge the method mentioned above has not been described in literature before.

The measurement of refractive index profile and aberration of radial gradient index lens by using imaging method

2004 ◽  
Vol 36 (2) ◽  
pp. 163-166 ◽  
Author(s):  
Xiaohong Sun ◽  
Hui Ma ◽  
Hai Ming ◽  
Zhiqiang Zheng ◽  
Jiwen Yang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Refractive Index Profile ◽  
Imaging Method ◽  
Gradient Index ◽  
Index Profile ◽  
Radial Gradient ◽  
Gradient Index Lens

scholarly journals Passive discrete lens for broadband elastic guided wave focusing

2021 ◽  
Author(s):  
Emeline Sadoulet-Reboul ◽  
Gaël Matten ◽  
Kaijun Yi ◽  
Morvan Ouisse
Keyword(s):  
Refractive Index ◽  
Elastic Wave ◽  
Health Monitoring ◽  
Focal Point ◽  
Refractive Index Profile ◽  
Guided Wave ◽  
Gradient Index ◽  
Frequency Range ◽  
Index Profile ◽  
Wave Focusing

Elastic guided wave focusing is of great interest for applications such as vibroacoustic control, energy harvesting, or Structural Health Monitoring. Different strategies allow generation of this effect, GRadient-INdex devices in particular exploit medium with varying properties such as thickness to reproduce an adequate refractive index profile as in optics. The resulting continuous profiles have a curved geometry that can be hard to manufacture, and be difficult to integrate in a given design. The purpose of this paper is to propose a discrete design for a GRIN lens. It is composed of segments selected in number and thickness to give similar focusing effects as a continuous lens profile. The identified configuration is manufactured and bounded on an aluminium plate to evaluate the effective focusing performances. Numerical and experimental vibrometry results confirm that the proposed lens exhibits a fixed focal point over a broad frequency range. The discrete design overcomes fabrication issues encountered in continuous design, allowing for an easier integration in devices for elastic wave control.

Sign in / Sign up

Export Citation Format

Share Document