Nonlinear crosstalk in a multichannel fiber‐optic communication system

1995 ◽  
Vol 63 (11) ◽  
pp. 1033-1038
Author(s):  
Hong Shi ◽  
Yan Lin ◽  
Sean Carney ◽  
Aaron Zygmunt ◽  
John R. Thompson
Keyword(s):  
Communication System ◽  
Fiber Optic ◽  
Fiber Optic Communication ◽  
Optic Communication ◽  
Nonlinear Crosstalk

SOLITON–SOLITON INTERACTION IN OPTICAL FIBERS

1999 ◽  
Vol 08 (04) ◽  
pp. 483-495 ◽  
Author(s):  
ANJAN BISWAS
Keyword(s):  
Optical Fibers ◽  
Optical Communication ◽  
Communication System ◽  
Fiber Optic ◽  
Single Channel ◽  
Soliton Interaction ◽  
Optical Communication System ◽  
Fiber Optic Communication ◽  
Interaction Of Solitons ◽  
Optic Communication

In an optical communication system it is necessary to place the solitons close to one another to increase the information carrying capacity of the fiber. The theory of soliton–soliton interaction in a fiber optic communication system, through a single channel, is studied in this paper. In presence of the perturbation terms, the two soliton interaction of the Nonlinear Schrödinger's Equation is investigated. It is analytically proved and numerically supported that the perturbation terms lead to the suppression of the interaction of solitons through an optical fiber.

Development of Internal Gas Pipe Inspection Robot

1995 ◽  
Vol 7 (5) ◽  
pp. 371-376 ◽  
Author(s):  
Yoshifumi Kawaguchi ◽  
◽  
Itsuo Yoshida ◽  
Keizo Iwao ◽  
Takashi Kikuta
Keyword(s):  
Power Supply ◽  
Communication System ◽  
Fiber Optic ◽  
Pipe Inspection ◽  
Inspection Robot ◽  
Fiber Optic Communication ◽  
Optic Communication ◽  
Inspection Robots ◽  
Dual Mechanism ◽  
Plug Valve

This paper describes a new mechanism and communication system for an in-pipe inspection robot. To date, inspection robots have been limited as to their mobility to turn in a T -shaped pipe or move in a plug valve. The new mechanism based on our dual magnetic wheels overcomes these limitations without difficult controls. This dual mechanism, resembling a crawler, enable the robot to climb over steep obstacles like sleeves and dresser joints. Another drawback of earlier robots is that the friction between the pipes and the cables for communication and power supply makes it difficult for them to move long distances. A fiber-optic communication system can reduce such friction. The spools of the fiber-optic communication cables and batteries are mounted on the robot and the cables are rolled or unrolled when the robot is moving forward or backward, respectively. An experimental inspection robot has been made to confirm the efficiency of the new mechanism. However, the robot fell off a Tshaped pipe when it attempted to turn in the pipe with its position being inadequate. It is difficult to eliminate such inadequacy because the robot might be disturbed while attempting to avoid a plug or because of sensors functioning uncertainly. For that reason, a mechanism which makes a robot twist is adopted. The improved experimental robot successfully turned in a T-shaped pipe even when its position was inadequate.

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