Optical communications – Multiplex – Broadcast and distribution system
Reexamination Certificate
2004-12-02
2010-12-07
Liu, Li (Department: 2613)
Optical communications
Multiplex
Broadcast and distribution system
C398S066000, C398S067000, C398S069000, C398S070000, C398S071000, C398S076000, C398S082000
Reexamination Certificate
active
07848652
ABSTRACT:
A wavelength division multiplexing passive optical network system is provided. A central office generates a multi-mode light having a mode interval equal to a period interval of a multiplexing filter of the remote node and the multi-mode light is used to control a wavelength of an uplink transmission optical signal of the optical network unit. A remote node multiplexes the multi-mode light with the multiplexing filter to transmit the multiplexed multi-mode light to the optical network unit and demultiplexes the uplink transmission optical signal to transmit the demultiplexed uplink transmission optical signal to the central office. An the optical network unit generates the uplink transmission optical signal by modulating a data signal with a Fabry-Perot laser which uses the multiplexed multi-mode light as an injection optical source. Accordingly, it is possible to control a wavelength of a transmitter of the optical network unit by using the injection optical source generated by the central office.
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Kang Hyun Seo
Koh Jai Sang
Lee Byung Tak
Lee Moon Seob
Blakely & Sokoloff, Taylor & Zafman
Electronics and Telecommunications Research Institute
Liu Li
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