A DWDM self-seeded source achieves transmission in the O-band up to 90km SSMF at 2.5Gbps. Moreover, a "face-to-face" self-seeded architecture permits to realize transmissions at 2.5Gbps with extra-long optical cavities reaching 70km of SSMF.

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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 10 Gbit/s, which are encouraging for the transmitter exploitation in fronthaul WDM multiplexing technology

International audienceWe report on a simple and fast method to estimate the fiber dispersion and laser chirp parameters on a dispersive Intensity Modulation and Direct Detection (IM/DD) optical channel. Based on the general IM/DD small-signal frequency response, we use the Downhill-Simplex algorithm to fit the channel measurement retrieved with a network analyzer to a general mathematical model. The method is proven to be quite efficient for light sources of different natures and with different adiabatic and transient chirp characteristics, including a Distributed Feedback (DFB) laser, an Electroabsorption modulator (EAM) and even a Reflective Semiconductor Optical Amplifier with fiber-Bragg grating (RSOA-FBG)

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In this paper, we experimentally demonstrated a self-seeded wavelength-division-multiplexed passive-opticalnetwork (WDM-PON) based on a high polarisation dependent gain reflective-semiconductor-optical-amplifier (RSOA). The experimental results show a possibility of implementing a WDM-PON with 16 channels of 100 GHz channel-spacing at 2.5 Gbit/s for a reach of 60 km. Considering FEC error-free transmission for all channels, an optical feeder budget of 22 dB was obtained. In the experiment, a drop fibre was experimented with different lengths up to 5 km. A total distance of 25 km was also achieved for a WDM-PON at 5 Gbit/s per channel.

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