Patra, P and Prabhudessai, A and Acharaya, A and Dasgupta, R and Sarkar, P and Tarafdar, A and Biswas, K and Annapurna, K (2024) Fabrication of High Purity S/Se Based Chalcogenide Bulk Glasses for Mid-Infrared Photonics Applications. [Book Chapter]
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Chalcogenide glasses are the widely used non-conventional amorphous matrices with unique extended infrared transmitting properties. Despite their attractive attributes, a major constraint in fabricating impurity (oxide, hydride, carbon) free bulk chalcogenide glasses may hinder the extended IR transmission. Considering this issue, a double container static-vacuum distillation technique has been implemented using 300 ppm metallic alumina (Al) as a scavenging agent during the glass melting process, thereby synthesizing free/low impurity bulk (thickness: 30 mm) As2Se3, AsSe2 As2S3, and As2S5 chalcogenide glasses. It has been observed from the transmission spectra of prepared glasses that absorption peaks corresponding to the residual OH, H2O, S�H, As-O, Se-O, and Se-H impurities have been drastically reduced after distillation. The distilled bulk As-S glasses exhibit good UV�visible and infrared transmission up to 70, and the transmission percentage for As-Se glasses is�~60. Interestingly, the IR-transmission edge has been extended up to 20 µm for Se glasses and up to 12 μm for S glasses. X-ray Diffraction (XRD) reveals the amorphous nature of all the prepared glasses. The changes in density, Refractive index (RI), and glass transition temperature (Tg) values after distillation are minor for all of the glasses, indicating that the properties of the glasses remain unchanged after distillation. Glasses exhibit reasonably good thermal stability (�T�>�100 °C), which makes them suitable for thermal processing like molding or fiber drawing. So, it is proposed that these low impurity glasses have the potential to be used as suitable core-clad combinations for the fabrication of fiber preform for MIR photonic applications like supercontinuum generation. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.
| Item Type: | Book Chapter |
|---|---|
| Publication: | Springer Proceedings in Materials |
| Publisher: | Springer |
| Additional Information: | The copyright for this article belongs to Springer. |
| Keywords: | Alumina; Aluminum oxide; Chalcogenides; Distillation; Fabrication; Glass transition; Refractive index; Selenium compounds; Supercontinuum generation, Bulk glass; Chalcogenide glass; Fiber Sensor; High purity; Infrared fibers; Photonic application; Property; �chalcogenide glass�; �infrared fiber sensor�; �supercontinuum generation�, Glass |
| Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
| Date Deposited: | 06 Sep 2024 11:23 |
| Last Modified: | 06 Sep 2024 11:23 |
| URI: | http://eprints.iisc.ac.in/id/eprint/86037 |
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