The thermal FM response induced by the tuning current in the GCSR laser is measured and modelled. A fast thermal time constant of 100 ns is observed. The effect of thermal induced frequency shift on implementing fast tuning in WDM systems is investigated.
A generalized theoretical analysis of an AC coupled fiber optic burst mode receiver for DC balanced transmission is presented. An overall optimization is performed for an optical burst switching network based on tunable laser transmitters
A system engineering approach for calculating the tuning time of an ultra-fast tunable laser transmitter based on the grating-assisted codirectional coupler with sampled reflector (GCSR) laser is presented. The limitations on tuning time are investigated theoretically and experimentally.
Frequency deviations in a regime of high rate current fluctuations in distributed feedback (DFB) and grating coupler sample reflector (GCSR) lasers are measured using novel statistical frequency discrimination technique. Thermal time constants of the order of nanoseconds are observed in both.
A tunable 10 Gbit/s transceiver, 300-pin MSA compatible, for optical burst-switching applications, is presented. Fast tuning (<50 ns) between 80 channels over the entire C-band together with a fast locking (<100 ns) burst-mode receiver are demonstrated.
Coherent homodyne crosstalk in optical systems is examined. A general approach is introduced to theoretically model the crosstalk of single and multiple interferers in DFB and FP laser systems with a finite modulation extinction ratio, with PIN and APD receivers, in external modulation systems. The theoretical results of this model are verified experimentally and are compared with other theoretical models. In addition, the trade off between modulation extinction ratio and crosstalk tolerance is investigated and optimized. The general mathematical model is implemented in a computer simulator program, creating an inclusive and pragmatic engineering tool. This computer simulator dramatically improves the design of next generation crossconnects, switched and routers. (C) 2001 Society of Photo-Optical instrumentation Engineers.
A fully operating wide-range (60 nm) fast-tunable (6 /spl mu/sec) directly-modulated (1.25 Gbit/sec) cost-effective WDM transmitter is reported. Both transmitter and its driver sub-systems are implemented using commercially available components.
