OFDM/DMT over Optical Fiber
3S PHOTONICS Announces 20Gbit/s Transmission Test Of 1915 LMA Laser Module Over 25km of Singlemode Fiber
November 6, 2009
3S PHOTONICS, world-leading French manufacturer of optical and optoelectronic components for telecommunications networks, recently announced that a prototype of its 1915 LMA Series of Next-Generation directly modulated 1550nm high bandwidth analog laser modules – introduced at ECOC in September – has been successfully tested at 19Gbit/s over 25km of single mode fiber without any chromatic dispersion compensation, and using OFDM modulation format.
The 1915 LMA prototype, presenting a 7GHz bandwidth and a +7dBm output power, was tested by Orange Labs in Lannion (France) within the EPOD telecom project, sponsored by the French National Research Agency – ANR.
A fully satisfactory 19Gbit/s transmission over a 25km single-mode optical fiber link was experimentally demonstrated using Discrete Multi-Tone modulation (DMT), a modulation format which is already widely deployed for xDSL-type copper lines (Digital Subscriber Line). The DMT signal contains 255 sub-carriers spread over 5GHz. Transmission was achieved without any chromatic dispersion compensation and with a 8.5GHz bandwidth APD-based receiver module.
These very promising experimental results reinforce the credibility of using OFDM modulation applied on a directly modulated analog laser module to design the Next-Generation of low cost broadband optical access networks.
Additional tests are underway to demonstrate product's transmission capability at 40Gbit/s.
About 3S PHOTONICS
3S PHOTONICS – formerly Alcatel Optronics – is the leading world manufacturer of laser chips, optical discrete modules and components for telecommunication networks. It designs, develops, manufactures and commercializes active components powered by in-house III-V optoelectronic chips based on both Gallium Arsenide (GaAs) and Indium Phosphide (InP) technologies and passive components using Fiber Bragg Gratings (FBG).
The 3S PHOTONICS renowned optoelectronic chip manufacturing plant of Nozay is a technological feat that is unique in the world as it brings together GaAs and InP technologies under the same roof.
Its product portfolio includes five product lines:
* Transmission Laser and Detector Modules
* Pump Laser Modules for terrestrial and submarine applications
* Chromatic Dispersion Compensation Modules
* Filters, gain equalizers and pump stabilizers based on Fiber Bragg Gratings for terrestrial and submarine applications
* Chips (lasers and detectors) and Front End Services
With over 14 years of experience, the company takes advantage of its expertise and know-how to also address new markets, providing smart solutions for defense, industrial and medical applications.
Based in Nozay (Essonne near Paris), 3S PHOTONICS is run by Alexandre Krivine and Didier Sauvage. The company employs over 160 people, of which 130 are experts in the photonics industry. For more information, visit: www.3Sphotonics.com.
SOURCE: 3S PHOTONICS
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