https://doi.org/10.1051/epjconf/202328701009
Photonic-chip integrated large-mode-area high-power CW optical amplifier
1 Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
2 Integrated Optical Systems, MESA+Institute for Nanotechnology, University of Twente, 7500AE, Enschede, The Netherlands
3 LIGENTEC SA, Switzerland CH-1024 Ecublens, Switzerland
4 Physics Department, Universität Hamburg UHH, Luruper Chaussee 149, 22761 Hamburg, Germany
* Corresponding author: tobias.herr@desy.de
Published online: 18 October 2023
Here, we report on a CMOS-compatible thulium-doped high power continuous wave (CW) optical amplifier, leveraging large mode-area gain waveguides. The amplifier structure combines a silicon nitride waveguide above which a sputtered 1250 nm-thick thulium-doped alumina gain layer is deposited. We demonstrate >220 mW output signal power at center wavelength of 1850 nm inside a 9-cm-long amplifier. Small signal gain of >15 dB is achieved.
© The Authors, published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
