Double line waveguide amplifiers written by femtosecond laser irradiation in rare-earth doped germanate glasses
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2020
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Journal of Luminescence
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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 μJ. The
photo-induced negative refractive index change was of 7.4 � 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.
Como referenciar
SILVA, DIEGO S. da; WETTER, NIKLAUS U.; KASSAB, LUCIANA R.P.; ROSSI, WAGNER de; ARAUJO, MARIANA S. de. Double line waveguide amplifiers written by femtosecond laser irradiation in rare-earth doped germanate glasses. Journal of Luminescence, v. 217, p. 1-5, 2020. DOI: 10.1016/j.jlumin.2019.116789. Disponível em: http://repositorio.ipen.br/handle/123456789/30417. Acesso em: 20 Apr 2024.
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