Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1991-06-28
1993-05-04
Coles, Sr., Edward L.
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359117, 359135, 385 16, H04J 1400
Patent
active
052086917
ABSTRACT:
An optical switching network comprises a plurality of optical splitters coupled respectively to inlet highways for receiving wavelength-time division multiplex (WTDM) signals through the respective inlet highways, each of the multiplex signals comprising a series of WTDM signals each being identified by a unique wavelength and a unique time slot. A like plurality of sets of tunable wavelength filters are provided. The filters of each set are coupled to respective outputs of the splitters for selecting one of the WTDM signals. A like plurality of time-space switches are associated respectively with the sets of the tunable wavelength filters. Each of the time-space switches has input ports and output ports, the input ports of the time-space switch being coupled respectively to outputs of the filters of the associated set for interchanging the time slot of the selected WTDM signal with another time slot and establishing a path for the selected wavelength between the input ports and the output ports. A like plurality of sets of wavelength tunable lasers are provided, the wavelength tunable lasers of each set being coupled to the output ports of an associated one of the time-space switches for generating an optical output according to the WTDM signal from the established path, the optical output having a wavelength different from the wavelength of the selected WTDM signal. A like plurality of optical combiners are provided for coupling the output of the wavelength tunable lasers of different sets to a respective one of outlet highways.
REFERENCES:
patent: 5005166 (1991-04-01), Suzuki et al.
patent: 5018130 (1991-05-01), Suzuki et al.
Coles Sr. Edward L.
NEC Corporation
Negash Knife-Michael
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