Optical time-division multiplexer using optical fiber for...

Details Optical time-division multiplexer using optical fiber for... Optical time-division multiplexer using optical fiber for...

2006-04-04

2006-04-04

Sedighian, M. R. (Department: 2633)

Optical communications

Multiplex

Time division

C398S052000, C398S075000

Reexamination Certificate

active

07024118

ABSTRACT:
An optical time-division multiplexer branches input light into a plurality of optical paths with different optical lengths. At least one path includes a section of optical fiber with an optical length that is adjustable by physical stretching. The input light is separately modulated on each optical path, and the modulated light signals are recombined into a multiplexed output light signal. Adjustment of the optical length of the optical fiber can compensate for changes in input wavelength and adjust the phase of successive pulses in the multiplexed output signal to provide a π-radian shift that enables long-haul optical transmission.

REFERENCES:
patent: 5471332 (1995-11-01), Shiragaki et al.
patent: 5917628 (1999-06-01), Ooi et al.
patent: 6005995 (1999-12-01), Chen et al.
patent: 6215941 (2001-04-01), Nagai et al.
patent: 2002/0003641 (2002-01-01), Hall et al.

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