Product category:
Optical Transceivers, Transponders and Repeaters
News Release from: Finisar Corp | Subject: XFP optical transceiver
Edited by the Electronicstalk Editorial
Team on 23 September 2003
Optical transceiver goes the distance on
old fibre
Finisar has demonstrated a 10Gbit/s XFP optical transceiver operating on 300m of legacy multimode fibre to a major 10-Gigabit Ethernet network equipment manufacturer.
Finisar has demonstrated a 10Gbit/s XFP optical transceiver operating on 300m of legacy multimode fibre to a major 10-Gigabit Ethernet network equipment manufacturer Finisar's new XFP optical module uses an uncooled 1310nm laser and electronic dispersion compensation (EDC) technology to transmit 10Gbit/s error-free over up to 300m meters of virtually any grade of legacy multimode fibre
This article was originally published on Electronicstalk on 13 Nov 2007 at 8.00am (UK)
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The Longwave fibre channel SFP+ 1310nm transceivers support 1.4km and 10km transmission over single-mode fibre.
This includes the 160/500MHz.km grade 62.5/125um fibre that constitutes the vast majority of the current infrastructure in the Enterprise LAN environment and which needs to be supported with a cost-effective solution when upgrading to 10-Gigabit Ethernet.
Other 10Gbit/s transceivers and transponders that use 850nm lasers can only transmit 26m on the most common legacy fibre.
In order for them to reach 300m, end-users need to deploy new high-bandwidth multimode fibre (2000MHz.km) at significant expense.
Further reading
Optical components improve reliability
Finisar's angled receptacle isolators provide an efficient, cost-effective means to protect laser components from unwanted back-reflections.
Optical subassembly pairs cut costs
Fabry-Perot laser diodes substantially reduce overall transceiver power consumption.
Another solution called LX4 uses four separate lasers of different wavelengths to achieve 300m, which translates into higher power dissipation, higher costs and reduced reliability.
"We believe that EDC technology provides the most practical solution for transmitting 10Gbit/s over 300m of legacy multimode fibre", said Lew Aronson, Chief Scientist at Finisar.
"By incorporating it into an XFP module, with its ultrasmall size and low power dissipation, we are taking a very big step in enabling high-volume deployments of 10-Gigabit Ethernet in the Enterprise".
Finisar has been shipping 10km versions of XFP transceivers for several months, and has already demonstrated a 40km DWDM XFP version at recent trade shows.
The XFP is an application-agnostic ultrasmall 10Gbit/s optical transceiver module standardised by the XFP MSA Group, which currently has more than 75 member companies.
Its ultrasmall footprint and extremely low power dissipation enables the highest board density 10Gbit/s applications in the industry.
These factors, in addition to its protocol independence, provide the lowest overall system cost solution for OEMs.
XFP transceivers support digital diagnostics functions via a 2-pin serial bus.
They provide calibrated, real-time measurements of the laser bias current, transmitted optical power, received optical power, internal transceiver temperature and supply voltage.
This diagnostic functionality allows telecommunication and data communications companies to implement reliable performance monitoring of their optical links in a very accurate and cost-effective way.
Additionally, Finisar's hot-pluggable XFP transceivers include a "bail" latch release mechanism for easy insertion and removal into the standardised metallic cage.
This cage is press-fit on the host board and includes a new modular heatsink design to facilitate heat management.
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