Burst mode operation of a DS-DBR widely tunable laser for wavelength agile system applications

Puttnam, Benjamin J.; Dueser, Michael; Thomsen, Benn C.; Bayvel, Polina; Bianciotto, A.; Gaudino, Roberto; Busico, G.; Ponnampalam, Lalitha; Robbins, David J.; Whitbread, N.D.

doi:10.1109/ofc.2006.215570

Cited by 7 publications

(10 citation statements)

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“…With an 80 mA variation of the current into the front tuning section of the laser in the OBS transmitter, a significant impact on neighbouring channels in the 50 GHz spaced WDM grid was observed, the crosstalk due to the wavelength drift leading to a floor in the BER plot. To overcome these problems, and to achieve significant reductions in wavelength switching times and improvements in wavelength stability, a fast wavelength locking control loop (WLCL), that compensates for the thermally induced drift, was developed at UCL [21]. The experimental set-up, including the WLCL, is shown in Fig 3. An improvement in switching time of three orders of magnitude and a five-fold improvement in wavelength stability was achieved, leading to error-free optical burst transmission at 10 Gbit/s with a 50 GHz WDM grid (Figs 4 and 5).…”

Section: Experimental Studies Of Obsmentioning

confidence: 99%

“…The experimental set-up, including the WLCL, is shown in Fig 3. An improvement in switching time of three orders of magnitude and a five-fold improvement in wavelength stability was achieved, leading to error-free optical burst transmission at 10 Gbit/s with a 50 GHz WDM grid (Figs 4 and 5). Details of the system and experimental results are presented in Puttnam and Bayvel [21].…”

Section: Experimental Studies Of Obsmentioning

confidence: 99%

“…At 40 Gbit/s and above, the fibre dispersion leads to pulse broadening and overlapping of adjacent pulses, which consequently interact due to the nonlinearity of the transmission fibres. The effects are termed intra-channel four-wave-mixing (IFWM) and intra-channel cross-phase-modulation (IXPM), and lead Fig 5 Q-factor measurements of signal quality across 500 ms burst after transmission through 0.3 nm 3 dB bandwidth filter for unlocked and wavelength locked (with SOA blanking) wavelength switches for (a) 50 mA tuning current switch on rear section (high to low) and (b) 140 mA tuning current modulation (low to high) on SOA section [21].…”

Section: Combating Fibre Nonlinearityoptimised Dispersion Maps and Admentioning

confidence: 99%

“…Wavelength scan of locked and unlocked switching transition after 50 mA tuning current switch on rear section with SOA blanking[21].…”

mentioning

confidence: 99%

“…Experimental set-up: (a) investigation of the wavelength switching process with high wavelength resolution (6 pm) using a voltage-controlled Fabry-Perot interferometer (FPI) and a digital delay generator to generate bursts; (b) analysis of signal degradation across bursts passed through narrow filtering elements from thermally induced wavelength drift[21].…”

mentioning

confidence: 99%

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Optical networks research at UCL

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Benlachtar²,

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et al. 2006

BT Technol J

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New dynamic optical switching technologies and adaptive transmission techniques will allow increased capacity and flexibility in future core and metro networks. The Optical Networks Group at UCL has carried out research focused on these areas, in collaboration with industry and other university research groups, for over a decade. In this paper, the technical challenges to be overcome in implementing dynamic, high-capacity networks are discussed, and recent results of the group's work are presented. New network architectures based on wavelength-routing and optical burst switching have been proposed and analysed, and the experimental demonstration of burst switching using fast wavelength-tunable lasers is described. High-capacity dense wavelength division multiplexed transmission systems, using advanced regeneration and equalisation techniques, have been studied, both theoretically, and experimentally using a dynamically reconfigurable recirculating fibre loop. Research results on advanced optical signal formats, all-optical 3R regeneration at 40 Gbit/s channel rates, adaptive analogue and digital electronic processing techniques and optical finite impulse response equalisation are presented. Finally, the development of optical performance monitoring technology, a key component of future all-optical networks, is described. The paper concludes with a prediction of future trends in optical communications research.

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Section: Experimental Studies Of Obsmentioning

confidence: 99%

Section: Experimental Studies Of Obsmentioning

confidence: 99%

Section: Combating Fibre Nonlinearityoptimised Dispersion Maps and Admentioning

confidence: 99%

“…Wavelength scan of locked and unlocked switching transition after 50 mA tuning current switch on rear section with SOA blanking[21].…”

mentioning

confidence: 99%

mentioning

confidence: 99%