High optical gain in erbium-doped potassium double tungstate channel waveguide amplifiers

Sergio A. Vázquez-Córdova, Shanmugam Aravazhi, Christos Grivas, Yean Sheng Yong, Sonia M. García-Blanco, Jennifer L. Herek, Markus Pollnau* (Corresponding Author)

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

7 Citations (Scopus)
79 Downloads (Pure)

Abstract

We report on the optical-gain properties of channel waveguides patterned into lattice-matched KGdxLuyEr1-x-y(WO4)2 layers grown onto undoped KY(WO4)2 substrates by liquid phase epitaxy. A systematic investigation of gain is performed for five different Er3+ concentrations in the range of 0.75 to 10at.% and different pump powers and signal wavelengths. In pump-probe-beam experiments, relative internal gain, i.e., signal enhancement minus absorption loss of light propagating in the channel waveguide, is experimentally demonstrated, with a maximum value of 12 ± 5 dB/cm for signals at the peak-emission wavelength of 1534.7 nm.

Original languageEnglish
Pages (from-to)6260-6266
Number of pages7
JournalOptics express
Volume26
Issue number5
DOIs
Publication statusPublished - 5 Mar 2018

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