Holography in commercially available photoetchable glasses.

Area of Science:

• Materials Science
• Optics
• Photonics

Background:

• Volume holographic gratings are crucial for optical data storage and processing.
• Photoetchable glasses offer potential for holographic applications.
• Existing methods often require complex chemical post-processing.

Purpose of the Study:

• To investigate the feasibility of recording and retrieving volume holographic gratings in Schott Foturan and Hoya PEG3 glasses.
• To evaluate the performance of these glasses for holographic storage without chemical etching.
• To compare the holographic properties of Foturan and PEG3 glasses.

Main Methods:

• Recording of volume holographic gratings using ultraviolet (UV) light at 325 nm.
• Thermal processing of exposed glass samples.
• Measurement of diffraction efficiency and light scattering.
• Utilizing commercially available Schott Foturan and Hoya PEG3 glasses.

Main Results:

• Successful recording and retrieval of volume holographic gratings in both Foturan and PEG3 glasses.
• Maximum diffraction efficiency of approximately 9% achieved for 1-mm-thick samples.
• Foturan samples exhibited slightly higher diffraction efficiencies.
• PEG3 samples showed lower light scattering compared to Foturan.

Conclusions:

• Schott Foturan and Hoya PEG3 glasses are suitable materials for volume holographic grating storage.
• Holographic storage is achievable without chemical etching, simplifying the process.
• The choice between Foturan and PEG3 depends on the desired balance between diffraction efficiency and light scattering.