APRIL 5, 2010 -- 3S Photonics, French manufacturer of optical and optoelectronic components for telecommunications networks, announced 32Gbit/s transmission over 20km of singlemode fiber without dispersion compensation using an AMOOFDM modulation of its new 1915 LMA series of next-generation directly modulated 1550nm high-bandwidth analog laser module.
This 1915 LMA prototype, presenting 17GHz bandwidth and a +10dBm output power was tested by Orange Labs in Lannion (France) within the EPOD telecom project, sponsored by the French National Research Agency–ANR.
Four months after demonstrating a 19Gb/s transmission over 25 km using Discrete Multi-Tone modulation (DMT), satisfactory 40Gb/s back to back test, and 32Gbit/s transmission over a 20km single-mode fiber link was experimentally demonstrated using Adaptively Modulated Optical OFDM signal (AMOOFDM) combined with a power/bit loading algorithm. The AMOOFDM signal contains 255 sub-carriers spread over 12GHz. Transmission was achieved without any chromatic dispersion compensation and using a 35GHz bandwidth PIN-based receiver module for direct detection.