Author:
Gaafar Mahmoud A.,Wang Kai,Ludwig Markus,Wildi Thibault,Lorenzen Jan,Francis Henry,Geiselmann Michael,Sinobad Milan,Kärtner Franz X.,Garcia-Blanco SoniaM.,Singh Neetesh,Herr Tobias
Abstract
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.