Method for decreasing and compensating the transmission loss...

Details Method for decreasing and compensating the transmission loss... Method for decreasing and compensating the transmission loss...

2007-01-30

2007-01-30

Pascal, Leslie (Department: 2613)

Optical communications

Multiplex

Wavelength division or frequency division

C359S341200, C385S024000

Reexamination Certificate

active

10353745

ABSTRACT:
The present invention relates to a wavelength-division multiplexed passive optical network. In particular, it relates to a technology for minimizing the optical loss at a wavelength-division multiplexed passive optical network based on wavelength-locked light source Thereby it improves the transmission quality and increases the transmission distance.A 4-port optical path setting device of the present invention increases the amount of light injected into an optical transmitter and thereby improves the wavelength-locking characteristic of a light source. In addition, it can decrease the optical transmission loss in an optical transmission path, and by an optical amplifier being inserted therein; it can also compensate the optical loss in an optical transmission path.In the present invention, a 4-port optical path setting device having the characteristics described above and a method for fault recovery without an additional optical loss are presented.

REFERENCES:
patent: 5625478 (1997-04-01), Doerr et al.
patent: 6941074 (2005-09-01), Nakamura et al.
patent: 2002/0067526 (2002-06-01), Park et al.

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