Narrowcast optical communication networks and methods

Details Narrowcast optical communication networks and methods Narrowcast optical communication networks and methods

1994-05-20

1995-10-10

Moore, David K.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359134, 359160, 359341, 372 6, H04B 1004, H04B 1000

Patent

active

054575621

ABSTRACT:
Alternative methods and apparatus for introducing narrowcast transmission signals into a fiber optic broadcast network utilizing rare-earth-doped fiber amplifier technology are disclosed. The methods and apparatus include utilizing an existing 1480 nm pumping laser in an erbium-doped fiber amplifier to transmit a narrowcast signal into a 1550 nm broadcast transport fiber. The 1480 nm narrowcast signal is split off from the amplified 1550 nm broadcast signal(s) in order to bypass a 1550 nm optical isolator located at the output of the amplifier and then recombined with the broadcast signal(s) after the isolator.

REFERENCES:
patent: 5204767 (1993-04-01), Nakata et al.
patent: 5331449 (1994-07-01), Huber et al.

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