3S PHOTONICS Announces Successful 20Gbit/s Transmission Test Of Its 1915 LMA Directly Modulated Analog Laser Module

3S PHOTONICS' new 1915 LMA 1550nm analog DFB laser module has been successfully tested at 19Gbit/s over 25km of single mode fiber without any chromatic dispersion compensation. These are promising results for Next-Generation broadband optical access networks

Nozay, November 5, 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 OFDM1 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 EPOD2 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 moduation 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.

SOURCE: 3S PHOTONICS