Abstract
Fast switching, widely tunable semiconductor lasers will be essential in dynamic wavelength provisioning in future optical networks where data is transmitted in optical bursts or packets ranging from 100ns to 100ms at standard ITU-T wavelengths [1]. Of the several designs proposed, the Digital Super-mode-Distributed Bragg Reflector (DS-DBR) is of particular interest since it is able to cover its full tuning range with high (13 dBm) and uniform output power and Side Mode Suppression Ratio (SMSR) (<30 dB), using significantly lower tuning currents, thus, reducing wavelength error from thermal transients and noise from current sources. Previously, DS-DBR has been used in burst transmitter (BTx) demonstrations employing wavelength locking (WL) and SOA blanking, to remove the spurious modes that are generated during the switching transition, on the μs-ms timescale [2, 3]. Here, we describe the nanosecond switching characteristics and demonstrate full BTx functionality, required for future optical burst switched networks, for the first time.
© 2009 IEEE
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