Fiber Optics Lift Aircraft Video-on-Demand
Systems
In-Flight Entertainment (IFE) has reached a new
level of sophistication with the introduction of P@ssport, a high bandwidth
system by Rockwell Collins, Cedar Rapids, IA, which makes possible a variety
of passenger amenities, including Internet access. The system incorporates
a fiber-optic backbone, expanded-beam fiber-optic interconnects, an ATM
switch and a downstream copper distribution system. The optical digital
signals originate at the system's servers, traveling on the fiber
backbone. Downstream the path converts to a FireWire distribution network
that takes the signals to electronics boxes at individual passenger seats.
New fiber optic connectors meet avionics standard ARINC 628 for IFE
systems
Key to the system is fiber-optic expanded beam interconnection technology
from Tyco Electronics, Harrisburg, PA. These connectors offer high reliability
in extreme environments, providing thermal, vibrational and mechanical stability
for reliable transfer of the light beams from one fiber to another. Other
improvements over a copper-based system include freedom from electromagnetic
interference and crosstalk. The fiber system also reduces weight and offers
non-sparking contacts.
Rather than butt two fiber ends together, expanded beam technology protects
and seals each fiber face and ferrule behind a spherical lens. These interconnects
provide precision coupling of fiber-optic signals without making physical
contact at the fiber-to-fiber interfaces. The connector's modular format
simplifies manufacturing, making it economically competitive with conventional
interconnect technologies. Precision alignment pins, integral to the connector,
facilitate blindmating.
Expanded beam technology protects and seals
each fiber face and ferrule behind a spherical lens
P@ssport has operated trouble-free for a year in commercial aircraft,
and the technology has crossed over to military aircraft for in-flight networks
under development. Tyco expects its expanded beam fiber-optic connector
technology to find use in rugged industrial applications.
--KC
For more information: Circle 523 - Rockwell Collins or
connect directly to their website via the Online Reader Service Program
at http://www.OneRS.net/106df-523
Circle 524 - Tyco Electronics or connect directly to http://www.OneRS.net/106df-524
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