La Boucle à Recirculation Courte: Un nouvel outil pour evaluer une ligne de transmission régénérée optiquement

session orale 31 « Systèmes et réseaux de télécommunications » [Ma31]National audienceNous présentons une technique pour caractériser la cascadabilité et la résistance au bruit d'un régénérateur optique. L'impact du rapport signal sur bruit optique sur les performances du régénérateur ainsi que l'efficacité de la régénération sont évalués au débit de 42,6 Gbit/s

4×170 Gbit/s DWDM/OTDM transmission using only one quantum dash Fabry Perot mode-locked laser

oral session 6.C "High Bit-Rate Transmission"International audienceWe demonstrate a 4×170 Gbit/s DWDM/OTDM transmission experiment using only one quantum dash Fabry-Perot mode-locked laser. BER measurements show a penalty of 1dB at BER=10^-9 for back-to-back and error floor for BER=10^-8 for transmission over 100 km

Cascadability assessment of a microcavity-saturable-absorber based phase-preserving amplitude regenerator in a DPSK transmission system

International audienceWe investigate the cascadability of a microcavity-saturable-absorber-based phase-preserving amplitude regenerator for RZ-DPSK signals. The results show that the tolerance of phase-encoded signals to nonlinear phase noise is increased. A distance improvement ratio up to 1.6 is experimentally demonstrated

All-optical phase-preserving amplitude regeneration of 28-Gbaud RZ-DQPSK signals with a microcavity saturable absorber in a recirculating loop experiment

Oral presentationInternational audienceMicrocavity Saturable absorber is used for phase-preserving amplitude regeneration of RZ-DQPSK signals. The regenerator is assessed in a 28 Gbaud recirculating loop showing system tolerance to nonlinear phase noise and distance improvement

Traitement tout-optique d'un Signal RZ DPSK à 42,7 Gbit/s en utilisant Absorbant Saturable en Micro-Cavité

session orale 8 : « Systèmes et réseaux de Télécommunication »National audienceDans ce papier, nous présentons une technique de traitement tout-optique à base d'absorbant saturable limitant les fluctuations d'intensité d'un signal RZ DPSK à 42,7 Gbit/s tout en préservant sa phase. Des mesures de taux d'erreur binaire et de facteur de qualité démontrent le potentiel du dispositif pour le traitement tout-optique d'un signal DPSK dans un régime où le bruit de phase non-linéaire est dominant

All-optical 2R regeneration with a vertical microcavity based saturable absorber

International audienceThis paper gives an overview of recent demonstrations of optical 2R regeneration achieved by vertical microcavity mirror based multiple-quantum-well Saturable Absorber (SA). The potential of the device to perform WDM regeneration is firstly demonstrated through the first pigtailed saturable absorber chip implemented with 8 independent fibres using a cost effective coupling technique. The cascadability and wavelength tunability assessment of this module associated to a power limiter fibre-based function has been experimentally demonstrated at 42.6 Gbit/s. Because this method of power limiting is not a suitable solution for all-optical multichannel 2R regeneration, a new SA structure allowing a power limiting function was proposed. We describe and characterize such a structure in this paper. This new SA opens the door to a complete passive all-optical 2R regeneration relying upon a single technology, as shown in this paper through the use of two SA: SA.0 for extinction ratio enhancement and SA.1 for power level equalization allowing receiver sensitivity (up to 3.5 dB) and Q factor (up to 1.4 dB) improvement for a RZ signal at 42.6 Gbit/s. The limitation of SA.1 when the regenerator must be cascaded a large number of times is also described, leading to the observation that SA.1 should be more suitable for phase encoded formats which are more spectrally efficient than OOK formats. A SA.1 used as a phase-preserving amplitude regenerator in a 42.6 Gbit/s RZ-DPSK transmission system is therefore assessed. A fibre launched power margin of 2 dB and a receiver sensitivity improvement of 5.5 dB are obtained. Finally, we use, for the first time an SA.1 as a phase-preserving amplitude regenerator of RZ DQPSK signals. The regenerator is assessed in a recirculating loop at 28 Gbaud. The system tolerance to nonlinear phase noise is enhanced by 3 dB and the distance improvement factor was 1.3 for a BER=10-4

Up to 425 GHz All Optical Frequency Down‐Conversion Clock Recovery Based on Quantum Dash Fabry‐Perot Mode‐Locked Laser

Postdeadline Session C " OFDM and OTDM "International audienceWe demonstrate that quantum‐dash mode‐locked laser can perform all optical frequency down‐conversion clock recovery up to 425 GHz. We measured 0.3 dB penalty on the optical recovered clock for 170 Gbit/s signal

Wavelength Tunability Assessment of a 170 Gbit/s transmitter using a Quantum Dash Fabry Perot mode-locked laser

oral session 6.2 "Quantum Dot and SOA" [6.2.2]International audienceWe demonstrate the tunability of a 170 Gbit/s transmitter based on a quantum dash mode-locked Fabry-Perot laser. Same performances are obtained over a 8 nm wavelength range simply by adjusting the shaping filter frequenc

Bit-Error-Rate Assessment of 170-Gb/s Regeneration Using a Saturable Absorber and a Nonlinear-Fiber-Based Power Limiter

International audienceA 170-Gb/s all-optical 2R regenerator made up of a fast saturable absorber and a highly nonlinear-fiber-based power limiter is reported for the first time. Bit-error-rate assessment of one of the four 42.5-Gb/s optical time-division-multiplexed tributaries shows a receiver sensitivity improvement

Colorless Components for WDM-based Optical Access Networks

Section B "PHOTONICS & LASERS AND APPLICATIONS" [B-45]International audienceThis paper presents our work carried out in the colorless-component technologies for high bit-rate optical access networks, which are based on WDM-PON (wavelength division multiplexed passive optical networks). The colorless concept consists in using identical and wavelength-independent components that will act as the generic transmitter in WDM-PON systems. The transmitted wavelength is imposed, for each colorless component, by an external optical signal. Our studies include two types of colorless components: The Injection-Locked Fabry-Perot laser (IL-FP) and the Reflective Electro-Absorption Modulator integrated with a Semiconductor Optical Amplifier (REAM-SOA). For the IL-FP, the properties of the component strongly depend on the injected optical signal. We demonstrate the improvement by injection-locking of the laser's performances in terms of intensity noise, chirp and bandwidth. For the REAM-SOA, the static properties such as reflection gain and noise characteristic are examined. We demonstrate the feasibility of the REAM-SOA in a transmission experiment in a PON configuration at 10 Gbps with up to 25 km of SMF, using remote modulation technique