Passive star coupler

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G02B 628

Patent

active

047876930

ABSTRACT:
A star coupler for a single-mode-fiber optical local area network which reduces the amount of fiber required by a factor of two and diminishes the number of components by one-half. This savings in fiber and components is effected by "reflecting" signals which appear at various locations of the network back toward the input ports. The arrangement forms a broadcast-type of local area network where a message transmitted by any user can be received by all users.

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Porter, "An Experiment Fiber Optic Data Bus System and Design Considerations," Feb. 1978, pp. We-5.1-5.13.
D. E. Altman, Naval Electronics Laboratory Center, Aug. 1976, "Fiber Optics Applications in the Shipboard Data Multiplex System," pp. 26-35.
Coyne, Laser Focus, Oct. 1979, vol. 15, No. 10, "Coupling: Do it with a Star," pp. 60-66.
Rawson, Eric, "Fibernet: Multimode Optical Fibers for Local Computer Networks," IEEE Transactions on Communications, vol. Com-26, No. 7, Jul. 1978, pp. 983-990.
Johnson et al., "Low-Loss Reflection-Star Couplers for Optical-Fiber Distribution Systems," Applied Physics Letters, vol. 35, No. 7, Oct. 1979, pp. 479-481.
Johnson et al., "Fused Biconical Tapered Fiber-Optic Devices: Application to Data Buses," Fiber and Integrated Optics, vol. 3, No. 2-3, Jul. 1980, pp. 263-281.
Tebo, Albert, "Fiber-Optic Couplers: Directional and Otherwise," Electro-Optical Systems Design, vol. 13, No. 11, Nov. 1981, pp. 25-45.

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