Optical switching device, optical access network, optical...

Details Optical switching device, optical access network, optical... Optical switching device, optical access network, optical...

2006-12-19

2011-10-25

Singh, Dalzid (Department: 2613)

Optical communications

Multiplex

Broadcast and distribution system

C398S173000

Reexamination Certificate

active

08045857

ABSTRACT:
In an optical access network using an optical switching device, a 2×1 optical splitter in the uplink and downlink directions is eliminated to extend the transmission distance between the OLT and the ONU. An optical switching device includes a downlink optical switch element for switching a downlink optical signal sent by an OLT, an uplink optical switch element for switching an uplink optical signal sent by a plurality of ONU, an O/E for converting a downlink optical signal to a first electrical signal, an E/O for converting the first electrical signal to a downlink optical signal and inputting the downlink optical signal to the downlink optical element, an O/E for converting an uplink optical signal output from the uplink optical switch element to a second electrical signal, and an E/O for converting the second electrical signal to an uplink optical signal and sending the uplink optical signal to the OLT.

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