Accession Number : ADP005205

Title :   Multi-Hundred-Fiber Cable Composed of Optical Fiber Ribbons Inserted Tightly into Slots,

Corporate Author : NIPPON TELEGRAPH AND TELEPHONE CORP TOKAI (JAPAN) NTT ELECTRICAL COMMUNICATIONS LABS

Personal Author(s) : Hatano,Satomi ; Katsuyama,Yutaka

Report Date : NOV 1986

Pagination or Media Count : 5

Abstract : A new type of cable assembly with a multitude of optical fibers is proposed and developed for use in subscriber loops. Optical fiber ribbons are tightly inserted into helically shaped rectangular slots on a polyethylene rod. Optical fiber ribbon and slot structures are investigated to minimize optical loss increase. Fiber coating and ribbon stranding structure design methods are presented. Fiber strains, especially a residual strain, are investigated. It is found that a residual strain is restricted to less than 0.05 % by selecting helical pitch of the slots as 700 mm or more to guarantee a required fiber life-time. Based on the design, 600-fiber cables are manufactured. It is demonstrated that the cables have excellent transmission properties through the mechanical and thermal tests and field trials. (Author)

Descriptors :   *FIBER OPTICS, SLOTS, JAPAN

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE