Micromachined passive waveguide fabrication with fs laser in Ag-doped GeO2–PbO glasses for photonics
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2024
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SYMPOSIUM ON MICROELECTRONICS TECHNOLOGY AND DEVICES, 38th
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This study aims to produce and characterize different dual waveguides using femtosecond (fs) laser irradiation on GeO2-based glass samples. The work is motivated by previous results obtained with rare earth ions doped GeO2 – PbO glass, with and without silver nanoparticles, in which irradiation, with fs laser was successful. The work aims to manufacture different structures such as straight, curved, and Y waveguides (using the double guide configuration) for applications in photonics (resonant rings, beam splitters, among others) in GeO2 – PbO glasses with silver nanoparticles. For both, straight and S curved waveguides, better M2 (beam quality factor) results were found for a distance between the guide walls of 10 μm, when compared to 25 μm. Moreover, among the two different curved guides produced it was also possible to observe better guidance when a larger radius of curvature (20 mm) was used; preliminary tests showed no guiding for 5 mm and 10 mm radius. The highest relative propagation loss was obtained for the S curved waveguide with a 25 μm distance between the guide walls whereas the lowest one was found for the Y shaped waveguide; for this configuration (opening angle of 5° and distance of 620 μm between the two arms) an output power ratio between the left and right arm of 53.9/46.1 showed promising applications for beam splitters.
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FERNANDES, THIAGO V.; BORDON, CAMILA D.S.; WETTER, NIKLAUS U.; ROSSI, WAGNER de; KASSAB, LUCIANA R.P. Micromachined passive waveguide fabrication with fs laser in Ag-doped GeO2–PbO glasses for photonics: straight, curved and Y shaped. In: SYMPOSIUM ON MICROELECTRONICS TECHNOLOGY AND DEVICES, 38th, September 2-6, 2024, Joao Pessoa, PB. Piscataway, Nova Jersey: IEEE, 2024. DOI: 10.1109/SBMicro64348.2024.10673876. Disponível em: https://repositorio.ipen.br/handle/123456789/48961. Acesso em: 30 Dec 2025.
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