Optical communications – Multiplex – Optical switching
Reexamination Certificate
2006-09-26
2006-09-26
Sedighian, M. R. (Department: 2613)
Optical communications
Multiplex
Optical switching
C398S031000, C398S033000, C398S053000, C398S057000, C398S059000, C398S102000, C398S161000
Reexamination Certificate
active
07113701
ABSTRACT:
An optical communication equipment comprises shared optical sources88a–88dto be shared by communication nodes100a–100d, the wavelengths of optical signals76a–76dare converted into desired wavelengths λa–λd according to the addressed information of the corresponding optical label signals77a–77dby using the shared optical sources88a–88d, and routed to the addressed communication nodes without being converted into electrical signals by using the wavelength routing function of the cyclic-wavelength arrayed-waveguide grating (AWG)120. The load of each communication node can be reduced by incorporating the multi-wavelength optical sources, which can be shared among individual communication nodes, into the router80. Further, each communication node is provided with an optical gate or the like for returning the optical signal to the communication node from which the optical signal has been transmitted through the router80in order to adjust the transmission time lag between the optical signal and the corresponding optical label signal by the controllers110a–110d.
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Kato Kazutoshi
Matsuoka Morito
Noguchi Kazuto
Okada Akira
Sakai Yoshihisa
Nippon Telegraph and Telephone Corporation
Sedighian M. R.
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