Abstract

Three-electrode distributed Bragg reflector (DBR) lasers are promising as light sources in future WDM systems. Application of the device, however, is limited, because of the complicated tuning scheme needed to tune the Bragg mode and the longitudinal cavity mode synchronously. Although single-current continuous tuning in the 3.1-3.8 nm range was obtained with single-current control using current splitting network[1,2], the inherent nonlinearity between the tuning current and the refractive index change requires device to device adjustment, and also limits the continuous tuning range due to the inevitable mismatching in the mode wavelength shift. In this paper, a novel tunable DBR laser with interdigital electrodes is proposed for single-current continuous tuning.

© 1995 Optical Society of America