Sophie Barbet

Up to 10.7-Gb/s High-PDG RSOA-Based Colorless Transmitter for WDM Networks

The operation of a network-embedded colorless self-tuning transmitter for WDM networks is experimentally demonstrated from 2.5- up to 10.7-Gb/s data rates. Colorless operation is achieved by self-seeding an ultra-fast reflective semiconductor optical amplifier (RSOA) with the feedback signal reflected at the WDM multiplexer filter. In particular, the transmitter exploits a 2-Faraday rotators configuration to ensure polarization insensitive operation and allowing for the exploitation of high gain RSOAs, which can be designed to operate on a single polarization. The impact on the transmission of the fiber chromatic dispersion at different bit-rates and with different channel bandwidths of the WDM multiplexer filter is experimentally investigated up to 10.7 Gb/s. The tolerance to positive and negative dispersive loads is also assessed.

C- and O-band operation of RSOA WDM PON self-seeded transmitters up to 10 Gb/s [Invited]

We propose a network-embedded colorless self-tuning transmitter for wavelength division multiplexed (WDM) networks based on self-seeding in reflective semiconductor optical amplifiers (RSOAs). We compare up to a 10-Gb/s data rate in either O-band or C-band operation. In particular, the transmitter exploits a two-Faraday rotator configuration to ensure polarization-insensitive operation and allowing for the exploitation of high-gain C- and O-band RSOAs, which present a very high polarization-dependent gain. Two different multiplexers and various lengths of drop fibers constituted the network-embedded transmitters in order to evaluate various dispersion load influence on cavity buildup. Moreover, transmission over standard single-mode feeder fiber has been evaluated both at 2.5 and 10 Gb/s to compare the performance in both bands, confirming the absence of chromatic dispersion penalties for the O-band operation.

10-Gb/s Operation of a Colorless Self-Seeded Transmitter Over More Than 70 km of SSMF

Operation of a network-embedded colorless self-tuning transmitter for wavelength division multiplexing (WDM) networks is experimentally demonstrated at 10-Gb/s data rate. Colorless operation is achieved by self-seeding an O-band reflective semiconductor optical amplifier (RSOA) with the feedback signal reflected at the remote node WDM multiplexer filter. In particular, the transmitter exploits a 2-Faraday rotators configuration to ensure polarization insensitive operation and allowing for the exploitation of high gain O-band RSOAs, which present a very high polarization dependent gain. Two different multiplexers and various lengths of drop fibers constituted the network-embedded transmitters. Transmission up to 72 km of standard single mode fiber has been demonstrated at 10 Gb/s, confirming the absence of chromatic dispersion penalties as expected from the choice of the O-band operation.

Quantum dash based single section mode locked lasers for photonic integrated circuits

We present the first demonstration of an InAs/InP Quantum Dash based single-section frequency comb generator designed for use in photonic integrated circuits (PICs). The laser cavity is closed using a specifically designed Bragg reflector without compromising the mode-locking performance of the self pulsating laser. This enables the integration of single-section mode-locked laser in photonic integrated circuits as on-chip frequency comb generators. We also investigate the relations between cavity modes in such a device and demonstrate how the dispersion of the complex mode frequencies induced by the Bragg grating implies a violation of the equi-distance between the adjacent mode frequencies and, therefore, forbids the locking of the modes in a classical Bragg Device. Finally we integrate such a Bragg Mirror based laser with Semiconductor Optical Amplifier (SOA) to demonstrate the monolithic integration of QDash based low phase noise sources in PICs.

Self-tuning transmitter for fibre-to-the-antenna PON networks

WDM PONs offering point-to-point connectivity, independence of multiple access protocol to share the medium are good candidates for supporting the new fronthaul fibre network requirements. The necessity to allow inventory and maintenance cost reduction will favour WDM PON solutions based on colourless transceivers. We present the proposal of a network embedded self-tuning colourless transmitter, based on reflective semiconductor optical amplifier (RSOA) self-seeding architectures. We analyse the fibre-to-the-antenna network requirements and evidence the capabilities of the network embedded self-tuning colourless transmitter, showing its principle of operation, the development and the modelling of the active elements. We present and discuss recent experimental results up to 10Gbit/s, which are encouraging for the transmitter exploitation in fronthaul WDM multiplexing technology.

Self-seeded RSOAs WDM PON field trial for business and mobile fronthaul applications

GEth, CPRI and 10 Gbit/s transmissions are experimented using amplified and standard self-seeded RSOA WDM PON systems. A field trial setup was exploited to test the system performance in terms of reach and optical budget.

Operation of a RSOA WDM PON Self-seeded Transmitter Over More than 50 km of SSMF up to 10 Gb/s

For the first time we present operation of a WDM PON self-seeded transmitter in the O-band achieving more than 50-km SSMF transmission up to 10 Gb/s over 8 channels.

DWDM Hybrid-Integrated TOSA and ROSA for 10

Compact parallel transmitters and receivers with an aggregate capacity of 107 Gb/s are built through hybrid integration of arrays of ten 100-GHz spaced directly modulated lasers, arrays of ten avalanche photodiodes, and high-index contrast silica arrayed waveguide grating multi- and demultiplexers. Unamplified transmission over 75 km of standard single-mode fiber and 155-km amplified links is demonstrated in the C-band, by using a modulation format based on spectral offset filtering and electronic dispersion compensation.

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In this paper we present the first demonstration of a InAs/InP Quantum Dash based mode Locked Laser (MLL) compatible with uncooled operation. For integration purpose, we designed a Distributed Bragg Reflector (DBR) mirror in order to close the cavity without disturbing the mode-locking efficiency. As a demonstration of integration, we fabricated such DBR monolithically integrated with a semiconductor optical amplifier. This opens the way to the integration e.g. of frequency comb generators in photonic integrated circuits.

10.7-Gb/s Transmission Over 75-km Links

We present an experimental analysis of a self-tuning colorless ONU transmitter based on amplified self-seeded RSOAs to be exploited in WDM PON fiber networks for fronthaul. The architecture is polarization independent thanks to the exploitation of high and low PDG RSOAs and Faraday rotators. The transmission over different lengths of fiber displaying various dispersive loads is demonstrated at 10 Gb/s evidencing the chromatic dispersion impact on performance.