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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
Da Silva, Diego Silverio [1] ; Wetter, Niklaus Ursus [1] ; Pires Kassab, Luciana Reyes [2] ; De Rossi, Wagner [1] ; De Araujo, Mariana Silva [3]
Total Authors: 5
Affiliation:
[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
Total Affiliations: 3
Document type: Journal article
Source: Journal of Luminescence; v. 217, JAN 2020.
Web of Science Citations: 0
Abstract

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)

FAPESP's process: 16/02326-9 - Micromachining with ultrashort laser pulses applied to the production and control of optofluidics circuits
Grantee:Diego Silvério da Silva
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 13/26113-6 - Micromachining with ultrashort laser pulses applied to the production and control of optofluidic circuits
Grantee:Wagner de Rossi
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 17/10765-5 - Highly efficient low threshold lasers in transparent and scattering media.
Grantee:Niklaus Ursus Wetter
Support Opportunities: Regular Research Grants