N.times.N wavelength router, optical routing method and associat

Details N.times.N wavelength router, optical routing method and associat N.times.N wavelength router, optical routing method and associat

1997-01-08

1998-11-17

Ngo, John

Optical waveguides

With optical coupler

Plural

385 37, 359117, G02B 628

Patent

active

058388486

ABSTRACT:
An N.times.N wavelength router (1) includes n m.times.m couplers (10, 15, 20, 25), N being equal to n.times.m, and the N inputs (11, 12, 16, 17, 21, 22, 26, 27) of the couplers being the inputs (E1-E8) of the N.times.N router. The N.times.N router also includes m n.times.n routers (30, 40) capable of switching an optical signal having a wavelength, from any one of its n inputs (31-34, 41-44) to any one of its n outputs (35-38, 45-48), according to the wavelength of the signal. The inputs of the n.times.n routers are connected to the outputs of the m.times.m couplers, and the outputs of the n.times.n routers are the outputs (S1-S8) of the N.times.N routers. The transmission spectra of the n.times.n routers have the form of a series of peaks, each of the series being different one from another.

REFERENCES:
patent: 5657406 (1997-08-01), Ball
patent: 5668652 (1997-09-01), Hashomoto et al.
Photonics in Switching, vol. 16, Mar. 15, 1993, Palm Springs, California, pp. 196-198, SHARONY: "Broadcast and Switch"--A New Class of WDM Networks for High Switching-Speed, High Connectivity Applications.
IEEE Transactions on Parallel and Distributed Systems, vol. 1, No. 2, May, 1990, New York, New York, pp. 47-53, Fujiwara: "Line Capacity Expansion Schemes in Photonic Switching".
International Switching Symposium, vol. 3, May 28, 1990, Stockholm, Sweden, pp. 21-26, Hill et al: "A Distributed Wavelength Switching Architecture for the TPON Local Network".
Globecom '92, vol. 3, Dec. 6, 1992, Orlando, Florida, pp. 1593-1599, HAAS: "The `Staggering Switch`: An `Almost-All` Optical Packet Switch".

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