Fiber taper diameter characterization using forward Brillouin scattering

Autor(es)

Jarschel, P. F. ^[1] ; Magalhaes, L. S. ^[1] ; Aldaya, I. ^{[1, 2]} ; Florez, O. ^[1] ; Dainese, P. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Gleb Wataghin Phys Inst, BR-13083859 Campinas, SP - Brazil

^[2] Sao Paulo State Univ, Campus Sao Joao Da Boa Vista, BR-13876750 Sao Joao Da Boa Vista - Brazil

• Tipo de documento: Artigo Científico
• Fonte: OPTICS LETTERS; v. 43, n. 5, p. 995-998, MAR 1 2018.
• Citações Web of Science: 7

Resumo

We propose a fast and non-destructive method to characterize the absolute diameter and uniformity of micrometer-scale fiber tapers using a pump and probe forward Brillouin scattering setup. The fundamental torsional-radial acoustic mode supported by the wire is excited using a pulsed pump laser and oscillates at a frequency that is inversely proportional to the taper waist diameter. This standing time-varying torsional-radial wave induces polarization modulation on a probe signal, whose spectrum structure reveals the sample diameter and its non-uniformity. By comparing our results with measurements using scanning-electron microscopy, a relative deviation of 1% or less was demonstrated, and diameter non-uniformity of less than 0.5% could be detected. (C) 2018 Optical Society of America (AU)

• Processo FAPESP: 08/57857-2 - Fotônica para comunicações ópticas
• Beneficiário: Hugo Luis Fragnito
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/20180-3 - Processos de espalhamento de luz em microestruturas fotônicas
• Beneficiário: Paulo Clóvis Dainese Júnior
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores