Node device of optical ring network

Details Node device of optical ring network Node device of optical ring network

2005-11-22

2005-11-22

Lee, John D. (Department: 2874)

Optical waveguides

With optical coupler

Plural

C385S016000, C398S003000, C398S007000, C398S045000, C398S059000, C398S083000, C370S223000

Reexamination Certificate

active

06968102

ABSTRACT:
A node device of an optical ring network is disclosed. With the node device, a counterclockwise auxiliary wavelength supplied from a third switch part is returned and supplied to a clockwise add/drop part when there is a fault in an optical transmission path on a left side, a clockwise auxiliary wavelength supplied from a second switch part is returned and supplied to a counterclockwise add/drop part when there is a fault in an optical transmission path on a right side, a clockwise active wavelength supplied from a clockwise add/drop part is returned and supplied to a first switch part when there is a fault in the optical transmission path on the right side, and a counterclockwise active wavelength supplied from the counterclockwise add/drop part is returned and supplied to a fourth switch part when there is a fault in the optical transmission path on the left side.

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