Transparent glass-ceramic waveguides made by femtosecond laser writing

Autor(es)

Ferreira, P. H. D. ^[1] ; Fabris, D. C. N. ^[2] ; Boas, M. O. C. Villas ^[2] ; Bezerra, I. G. ^[1] ; Mendonca, C. R. ^[3] ; Zanotto, E. D. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Phys, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Carlos, Grad Program Mat Sci & Engn, BR-13565905 Sao Carlos, SP - Brazil

^[3] Univ Sao Paulo, Sao Carlos Inst Phys, POB 369, BR-13561970 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: OPTICS AND LASER TECHNOLOGY; v. 136, APR 2021.
• Citações Web of Science: 0

Resumo

Transparent glass-ceramics (TGC) have been investigated to replace hard, mechanically strong, scratch resistant materials in ballistic armor applications and smart phone displays. Certain types of TGC have superior performance than bomsilicate and soda-lime glasses, and are much easier to produce, especially large parts, than transparent mono or polycrystalline ceramics. Thereupon, transparent glass-ceramics could be feasible in other applications, such as stronger photonic devices. In this work, we used femtosecond laser pulses to inscribe optical waveguides inside a magnesium aluminum silicate (MAS) precursor glass and glass-ceramic, which has shown satisfactory mechanical properties to be applied as ballistic armor. Single mode waveguides for the precursor glass and ring mode for MAS-TGC were obtained and characterized (total insertion loss, mode profile, and threshold energy for heat diffusion at different fabrication depths). Micro-Raman measurements on the microfabricated waveguide core and on the pristine material surface show some difference for the TGC, but none for the glass. Particularly, we found that the threshold energy for heat diffusion is higher in the MAS glass-ceramic than in its parent glass. Its good optical waveguiding and mechanical properties indicate that this new TGC might be adequate for photonic devices that require mechanically competent materials. (AU)

• Processo FAPESP: 18/11283-7 - Fotônica não linear: espectroscopia e processamento avançado de materiais
• Beneficiário: Cleber Renato Mendonça
• Modalidade de apoio: Auxílio à Pesquisa - Temático