by C. E. Osornio-Martinez, D. B. Bonneville, M. Dijkstra and S. M. García-Blanco
Abstract:
We demonstrate reactively sputtered polycrystalline Al2O3:Er3+ waveguide amplifiers exhibiting external fiber-to-fiber net gain, broadband amplification, and low noise figure. With an erbium concentration of 1.5 × 1020 ions/cm3, a 30 cm amplifier length, and bi-directional pumping at 1480 nm, > 14 dB of external gain at 1550 nm is shown with off-chip output powers of over 56 mW measured at the output fiber, as well as sustained gain across 60 nm of bandwidth. The fiber-to-fiber noise figure (NF) is 6.5 ± 0.1 dB at 1550 nm, with a minimum value of 5.6 ± 0.1 dB at 1566 nm. Such a device is made possible using polycrystalline Al2O3:Er3+ capable of high-temperature LPCVD SiO2 cladding, and therefore low coupling and background waveguide losses down to 2.5 dB/facet and below 0.1 dB/cm, respectively, due to high conformality and optical quality. This demonstration highlights the importance and advantages of using polycrystalline Al2O3:Er3+ for applications that require optical amplification on a scalable and versatile photonic waveguide platform.
Reference:
C. E. Osornio-Martinez, D. B. Bonneville, M. Dijkstra and S. M. García-Blanco, “Scalable erbium-doped waveguide amplifier with external fiber-to-fiber gain using reactively sputtered polycrystalline aluminium oxide”, Optics Express, vol. 33, no. 11, pp. 22458–22468.
Bibtex Entry:
@article{osornio-martinez_scalable_2025,
title = {Scalable erbium-doped waveguide amplifier with external fiber-to-fiber gain using reactively sputtered polycrystalline aluminium oxide},
volume = {33},
copyright = {© 2025 Optica Publishing Group},
issn = {1094-4087},
url = {https://opg.optica.org/oe/abstract.cfm?uri=oe-33-11-22458},
doi = {10.1364/OE.558707},
abstract = {We demonstrate reactively sputtered polycrystalline Al2O3:Er3+ waveguide amplifiers exhibiting external fiber-to-fiber net gain, broadband amplification, and low noise figure. With an erbium concentration of 1.5 × 1020 ions/cm3, a 30 cm amplifier length, and bi-directional pumping at 1480 nm, > 14 dB of external gain at 1550 nm is shown with off-chip output powers of over 56 mW measured at the output fiber, as well as sustained gain across 60 nm of bandwidth. The fiber-to-fiber noise figure (NF) is 6.5 ± 0.1 dB at 1550 nm, with a minimum value of 5.6 ± 0.1 dB at 1566 nm. Such a device is made possible using polycrystalline Al2O3:Er3+ capable of high-temperature LPCVD SiO2 cladding, and therefore low coupling and background waveguide losses down to 2.5 dB/facet and below 0.1 dB/cm, respectively, due to high conformality and optical quality. This demonstration highlights the importance and advantages of using polycrystalline Al2O3:Er3+ for applications that require optical amplification on a scalable and versatile photonic waveguide platform.},
language = {EN},
number = {11},
urldate = {2025-11-25},
journal = {Optics Express},
author = {Osornio-Martinez, C. E. and Bonneville, D. B. and Dijkstra, M. and García-Blanco, S. M.},
month = jun,
year = {2025},
keywords = {Aluminum oxide, Optical amplifiers, Semiconductor optical amplifiers, Erbium fibers, Lithography, Silicon nitride},
pages = {22458--22468},
file = {Full Text PDF:E:\Usuarios\Administrator\Zotero\storage\2HHUL4LA\Osornio-Martinez et al. - 2025 - Scalable erbium-doped waveguide amplifier with external fiber-to-fiber gain using reactively sputter.pdf:application/pdf},
}