Nonlinear optical waveguides inscribed by fs-laser in organic crystal for broadband second harmonic generation of UV pulses

Autor(es)

Almeida, Gustavo F. B. ^[1] ; Martins, Renato J. ^[1] ; Siqueira, Jonathas P. ^[1] ; Almeida, Juliana M. P. ^[1] ; Rodrigues, Jr., Jose J. ^[2] ; Mendonca, Cleber R. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis Sao Carlos, CP 369, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Fed Sergipe, Dept Fis, BR-49100000 Sao Cristovao, SE - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Optical Materials; v. 83, p. 229-232, SEP 2018.
• Citações Web of Science: 0

Resumo

Optical waveguides are main components for the development of integrated photonic devices, not only for allowing light guidance but also for their ability to act as nonlinear optical elements. Direct laser writing with ultrashort pulses has provided considerable advances in the fabrication of 3D waveguides and the improvement of its optical properties. Nonetheless, such progresses have been achieved for waveguides designed in inorganic materials and little attention has been devoted to organic crystals, which offer new perspectives for the field. In this direction, this paper describes the fs-laser inscription of cladding waveguides in an amino acid crystal, with guiding losses on the order of 0.5 dB/mm at visible and infrared regions. Such waveguides are able to act as active nonlinear optical elements, supporting broadband second harmonic generation centered at 377 nm, with a normalized power conversion efficiency of (10.3 +/- 0.4) % (MW cm(2))(-1). Its normalized intensity conversion efficiency was greater than the one for the crystal itself, probably due to the influence of the waveguide dispersion contribution on the phase matching condition. (AU)

• Processo FAPESP: 15/17058-7 - Implementação e aplicação de LIFT com laser de femtossegundos em vidros de elevadas não linearidades ópticas
• Beneficiário: Juliana Mara Pinto de Almeida
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 11/12399-0 - Aplicações de pulsos de femtossegundos em óptica não linear: espectroscopia, formatação de pulsos e microfabricação
• Beneficiário: Cleber Renato Mendonça
• Modalidade de apoio: Auxílio à Pesquisa - Temático