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Photorefraction in lead tin-fluorophosphate glasses
Optics Letters
|December 20, 2007
Summary
Permanent grating patterns were created in lead-tin-fluorophosphate glasses using UV radiation. These volume gratings exhibit photorefractive index changes comparable to germanium-silicon dioxide glasses.
Area of Science:
- Materials Science
- Optics
- Photonics
Background:
- Glasses are crucial optical materials.
- Photorefractive effects enable optical data storage and processing.
- Lead-tin-fluorophosphate glasses offer potential for novel photonic applications.
Purpose of the Study:
- To investigate the feasibility of writing permanent grating patterns in lead-tin-fluorophosphate glasses.
- To study the photorefractive properties of these glasses under UV radiation.
- To compare the induced index changes with established photorefractive materials.
Main Methods:
- Direct writing of grating patterns using ultraviolet (UV) radiation.
- Analysis of grating characteristics (volume vs. surface).
- Measurement of induced refractive index changes in various tin-fluorophosphate compositions.
Main Results:
- Permanent grating patterns were successfully inscribed in lead-tin-fluorophosphate glasses.
- The gratings were confirmed to be volume gratings, not surface elements.
- Significant photorefractive index changes were observed, comparable to GeO(2)-SiO(2) glasses.
Conclusions:
- Lead-tin-fluorophosphate glasses are suitable for direct grating inscription via UV radiation.
- These glasses exhibit promising photorefractive behavior for optical applications.
- Their performance rivals that of established germanium-silicon dioxide photorefractive materials.
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