Backward-flow ladder architecture and method

Details Backward-flow ladder architecture and method Backward-flow ladder architecture and method

1987-02-02

1988-11-15

Lee, John

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

350 9615, 455612, G02B 628

Patent

active

047844531

ABSTRACT:
A ladder architecture comprises an input optical fiber bus and an output optical fiber bus. A plurality of input optical couplers couple light between the input bus and a plurality of branching fibers. A plurality of output couplers couple light from the branching fibers to the output bus. The input bus and the branch fibers may be single mode optical fibers while the output bus a multimode optical fiber. The input couplers may be symmetrical, single mode devices, and the output couplers may be asymmetrical and single mode to multimode devices. The input bus may also be a multimode fiber, and the input couplers may also be multimode to single mode devices. The asymmetrical coupling reduces the amount of signal lost at fiber ends.

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