Optical communications – Multiplex – Hybrid
Reexamination Certificate
2005-10-17
2009-10-06
Phan, Hanh (Department: 2613)
Optical communications
Multiplex
Hybrid
C398S067000, C398S069000, C398S072000, C398S098000, C398S099000, C398S100000, C398S102000, C398S033000, C398S195000, C398S196000, C370S352000, C370S392000, C370S389000, C370S465000, C725S121000, C725S125000, C725S129000, C725S105000
Reexamination Certificate
active
07599624
ABSTRACT:
A channel switching function is added to a wavelength division multiplexing passive optical network (WDM-PON) system, which is an access optical network system, and the potential transmission rate is increased by combining wide wavelength tunable lasers and a time division multiplexing (TDM) data structure and properly using the necessary optical components. In addition, when the wavelength of a light source or an arrayed waveguide grating (AWG) changes, the wavelength is traced and the magnitude of a transmitted signal is maximized without an additional detour line using a loop-back network structure. Furthermore, fewer thermo-electric controllers (TECs) are required for stabilizing the temperature of an optical line terminal (OLT) using wavelength tunable lasers, each laser electrically changing its wavelength.
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Baek Yong Soon
Choi Kwang Seong
Oh Kwang Ryong
Oh Su Hwan
Park Moon Ho
Blakely , Sokoloff, Taylor & Zafman LLP
Electronics and Telecommunications Research Institute
Phan Hanh
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