Abstract

Integrated Al2O3:Er3+ channel waveguide ring lasers were realized on thermally oxidized silicon substrates. High pump power coupling into and low laser output power coupling from the ring is achieved in a straightforward design. Output powers of up to 9.5μW and slope efficiencies of up to 0.11% were measured while lasing was observed for a threshold diode-pump power as low as 6.4mW for ring lasers with cavity lengths varying from 2.0to5.5cm. Wavelength selection in the range 15301557nm was demonstrated by varying the length of the output coupler from the ring.

© 2009 Optical Society of America

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