International audienceWe report a chalcogenide suspended-core fiber with a record Kerr-nonlinearity of 46 000 W-1km-1 and attenuation of 0.9 dB/m. Four-wave-mixing efficiencies of -5.6 dB at 10 GHz and -17.5 dB at 42.7 GHz are obtained
We propose a new solution for modal decomposition in multimode fibers, based on a spectral and spatial imaging technique. The appearance of spurious modes in the spectral and spatial processing of the images at the output of the fiber under test when it has more than two modes is demonstrated theoretically. The new method, which allows us to identify spurious modes, is more accurate, simpler, and faster than previously reported methods. For demonstration, measurements in a standard step-index multimode fiber and a small-core microstructured fiber are carried out successfully.
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 networkembedded 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. Index Terms-Chromatic dispersion; Colorless optical transmitter; Reflective semiconductor optical amplifier (RSOA); WDM passive optical networks (PON).
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
We report a chalcogenide suspended-core fiber with ultra-high nonlinearity and low attenuation loss. The glass composition is As(38)Se(62).With a core diameter as small as 1.13 µm, a record Kerr nonlinearity of 46,000 W(-1) km(-1) is demonstrated with attenuation loss of 0.9 dB/m. Four-wave mixing is experimented by using a 1m-long chalcogenide fiber for 10 GHz and 42.7 GHz signals. Four-wave mixing efficiencies of -5.6 dB at 10 GHz and -17.5 dB at 42.7 GHz are obtained. We also observed higher orders of four-wave mixing for both repetition rates.
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.
We demonstrate the interest of expanded beam microlenses (around 55 µm of mode field diameter) to relax positioning tolerances and to decrease reflectance in single mode fiber to fiber interconnexions. We also point out the interest of micro-lenses of very small mode field diameter (around 2 µm) to improve coupling efficiency in specialty fibers and integrated waveguides for non linear effects based functions and for sensors applications at a wavelength of 1.55 µm.
International audienceA new microlens design brings together benefits of physical contact and expanded beam technologies resulting in a reliable single-mode fiber connection requiring low maintenance for 10 Gbit/s networks as the Fiber-To-The-Home
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