Abstract
Erbium-doped glass waveguides are expected to be used as active elements in integrated-optical devices for optical-communication systems.1 Planar-waveguide optical amplifiers have been realized with straight and with curved erbium-doped glass waveguides.2,3 However, there have been no reports to date on sophisticated planar-waveguide amplifiers integrated with a pump/signal-light multiplexing circuit. Here, we describe what we believe to be the first integrated silica-based planar-waveguide amplifier on a silicon substrate with a 980/1530-nm wavelength-division-multiplexing (WDM) directional coupler lor multiplexing the pump and signal lights.
© 1994 Optical Society of America
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