Optical communications – Transmitter and receiver system – Including synchronization
Reexamination Certificate
2003-10-22
2011-11-29
Phan, Hanh (Department: 2613)
Optical communications
Transmitter and receiver system
Including synchronization
C398S155000, C398S161000, C398S102000, C398S192000, C398S140000, C385S015000, C385S027000, C385S016000, C372S025000, C372S069000
Reexamination Certificate
active
08068743
ABSTRACT:
An optoelectronic timing system includes an adaptive frequency generator system in which optical pulses are developed by a semiconductor laser. The pulses are directed into a number of time-quantifiable optical paths. Time quantification for a pulse is based upon the time required for a pulse to travel a particular length at the speed of light. Pulses are recombined at a nodal point and exhibit a numerical relationship with the periodicity of the issued pulse train equal to the numerical relationship between the lengths of the number of optical waveguides. A pulse detector and a regenerator are coupled to the semiconductor laser. A regeneration waveguide having a length equal to the longest of the optical paths is coupled to receive pulses from the laser. A pulse traveling the regeneration waveguide and directed to the pulse detector and regenerator triggers the laser to issue a next pulse, the physical length of the regeneration waveguide defining a fundamental frequency of the system and the number and lengths of the optical paths defining multiples of the fundamental frequency.
REFERENCES:
patent: 5402256 (1995-03-01), Spanke
patent: H1626 (1997-01-01), Kersey
patent: 5691832 (1997-11-01), Liedenbaum et al.
patent: 6967977 (2005-11-01), Hasson
patent: 2001/0010739 (2001-08-01), Takiguchi
LightTime, LLC
Millers David T.
Phan Hanh
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