Optical waveguides – With optical coupler – Switch
Patent
1992-03-17
1993-12-14
Ullah, Akm E.
Optical waveguides
With optical coupler
Switch
385 24, G02B 610
Patent
active
052710750
ABSTRACT:
This invention relates to a remotely optically powered fiber optic switch, e.g. in a fiber optic network, and a GRIN-rod (Graded-Refractive-Index-rod) lens with integrated planar mirror as a switching element, in particular suited for fiber optic switches. A distribution panel, in which the switching element, a wavelength-division demultiplexer, a light-into-current converter, and an actuator for the switching element are situated, is remotely optically powered from a station in the network. Part of this station is a laser diode which feeds a powering lightwave via a wavelength-division multiplexer into an optical fiber interconnecting the station with the distribution panel, which fiber can also be used for data transmission. The light-into-current converter receives the powering lightwave and generates an electric current for driving the actuator and moving the switching element. A GRIN-rod lens with integrated planar mirror serves as switching element by rotating it in a ferrule and establishing different light paths depending on the position of the integrated mirror with respect to lightwaves optically coupled to the end facets of the GRIN-rod.
REFERENCES:
patent: 4148558 (1979-04-01), Schuck
patent: 4304460 (1981-12-01), Tanaka et al.
patent: 4366565 (1982-12-01), Herskowitz
patent: 4867517 (1989-09-01), Rawson
patent: 5058101 (1991-10-01), Albanese et al.
"Optical Bypass Switch For Fiber-Optic Data Bus System" by Nunoshita et al. Applied Optics, vol. 19, No. 15, Aug. 1, 1980, pp. 2574-2577.
Palounek, L. C. "Nematic Local Area Network Concentrator Switch", IBM Technical Disclosure Bulletin, vol. 26, No. 2, Jul. 1983, pp. 790-791.
Miki, Tetsuya, et al. "Viabilities of the Wavelength-Division-Multiplexing Transmission System Over an Optical Fiber Cable", IEEE Transactions on Communications, vol. 26, No. 7, Jul. 1978, pp. 1082-1087.
Gfeller Fritz
Heinzmann Peter L.
Martin Oliver
Mueller Johann R.
Feig Philip J.
International Business Machines - Corporation
Ullah Akm E.
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