Optical communications – Multiplex – Hybrid
Reexamination Certificate
2008-05-27
2008-05-27
Tran, Dzung (Department: 2613)
Optical communications
Multiplex
Hybrid
C398S066000, C398S076000
Reexamination Certificate
active
10423760
ABSTRACT:
An apparatus and method for enabling cost-effective duplex communication by diplexing one of down stream signals for frequency up-conversion in a hybrid fiber-radio system includes diplexing an unmodulated mode signal among beating signals between a master laser and an injection-locked slave laser and using the diplexed signal for down-conversion in upstream transmission, thereby eliminating the need for expensive high-frequency local oscillators for frequency conversion. Higher radio frequency signals can be generated using beating between basic modes and satellite modes such as FWM conjugates of the master laser and slave laser. Cost-effective systems, stabilization of a light source and improved transmission performance may be achieved by using a diplexer instead of an expensive high-frequency local oscillator.
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Lee & Morse P.C.
Tran Dzung
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