TUNABLE ELECTROABSORPTION MODULATED LASER INTEGRATED WITH A BENT WAVE-GUIDE DISTRIBUTED-FEEDBACK LASER

The fabrication of the first 1.55-mu m wavelength tunable electroabsor ption modulated laser integrated with a bent waveguide distributed-fee dback laser is reported. A low-threshold and stable single-mode operat ion is obtained when the devices were uniformly pumped. A single-mode output power close to 10 mW from a single-mode fiber (40 mW in free sp ace) Is obtained with a 0 V bias to the modulator and an extinction ra tio of up to 15 dB at 2.5 V. This single mode stability is due to the continuously distributed phase shift implemented in the structure, Wit h a nonuniform injection, it was possible to select one particular mod e out of the three neighboring modes inside the broad-reflection band of the reflector, A tuning range of 3.5 nm was obtained while maintain ing an output power of more than 2 dBm from each mode.