Double line waveguide amplifiers written by femtosecond laser irradiation in rare-earth doped germanate glasses

Autor(es)

Da Silva, Diego Silverio ^[1] ; Wetter, Niklaus Ursus ^[1] ; Pires Kassab, Luciana Reyes ^[2] ; De Rossi, Wagner ^[1] ; De Araujo, Mariana Silva ^[3]

Afiliação do(s) autor(es)

^[1] IPEN CNEN SP, Inst Pesquisas Energet & Nucl, Ctr Lasers & Aplicacoes, 2242 A Prof Lineu Prestes, Sao Paulo, SP - Brazil

^[2] CEETEPS, Fac Tecnol Sao Paulo, BR-01124060 Sao Paulo, SP - Brazil

^[3] IPEN CNEN SP, Inst Pesquisas Energet & Nucl, Ctr Ciencia & Tecnol Mat, 2242 A Prof Lineu Prestes, Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Luminescence; v. 217, JAN 2020.
• Citações Web of Science: 0

Resumo

We report the production of active double waveguides in Er/Yb doped GeO2-PbO glasses, by direct femtosecond laser writing. The glasses were produced using the melt-quenching technique and the active waveguides were written using 30 fs laser pulses, at 800 nm, with writing speed of 0.06 mm/s and pulse energy of 32 mu J. The photo-induced negative refractive index change was of -7.4 x 10(-3). The Er/Yb doped sample showed a relative gain (signal enhancement of 7.5 dB/cm, for 105 mW of 980 nm pump power. The relative gain compensates both, the propagation losses and the absorption losses, and a positive maximum internal gain of 4.6 dB/cm can be obtained at the signal wavelength of 1550 nm. The results obtained in present work demonstrate that Er/Yb glasses are promising materials for the fabrication of integrated amplifiers, lossless components and lasers based on germanate glasses. (AU)

• Processo FAPESP: 16/02326-9 - Microusinagem com laser de pulsos ultracurtos aplicada na produção e controle de circuitos optofluídicos
• Beneficiário: Diego Silvério da Silva
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 13/26113-6 - Microusinagem com laser de pulsos ultracurtos aplicada na produção e controle de circuitos optofluídicos
• Beneficiário: Wagner de Rossi
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 17/10765-5 - Lasers com alta eficiência e baixo limiar de operação em meios espalhadores e transparentes
• Beneficiário: Niklaus Ursus Wetter
• Modalidade de apoio: Auxílio à Pesquisa - Regular