Optical-loss change characteristics of fiber organizers for optical-fiber cable joints

• Published in: Electronics & communications in Japan. Part 1, Communications Vol. 72; no. 4; pp. 96 - 105
• Main Authors: Shimizu, Masatoshi, Kobayashi, Hideo, Tomita, Nobuo
• Format: Journal Article
• Language: English
• Published: New York Wiley Subscription Services, Inc., A Wiley Company 01.04.1989
• ISSN: 8756-6621; 1520-6424
• DOI: 10.1002/ecja.4410720411

This paper discusses and evaluates optical‐loss change characteristics which occur in the process of installing the optical‐fiber splicing points and slack fibers into an optical‐fiber organizer. First, as the optical‐loss change factors, bend lateral force and twisting were discussed. Their effects on the loss characteristics have been studied theoretically and experimentally so that the main factor for degrading the transmission characteristics is the bending process of the slack fiber. Next, the evaluation method for the optical‐loss change characteristics is studied at the fiber joint for the analog baseband video signal transmission. It is found that the allowable optical output vs. optical‐loss change ratio SNRC is 37.1 dB, and the bend radius is satisfying the present allowable SNRC at all frequency components of the optical loss change is more than 18 mm. Also, the relationship was studied between the bending radius of the fiber satisfying this SNRC and the changing frequency. It is found that the allowable bend radius can be relaxed by about 20 percent by doubling the fiber organizing time. Further, the optical‐loss change characteristics have been evaluated for the individual organization and the simultaneous organization. It is pointed out that the individual organization is suited for subscriber optical cables.