Abstract

Mode conversion coefficients in graded-index fibers with various fiber-coating schemes are measured. The experiment proved that graded-index and step-index fibers agree in the order of magnitude of parameters representing random bends along the fiber axis. It is found that mode conversion coefficients are largely concerned with the structure of the coating. The results show that mode conversion characteristics are affected by structure of the coating and refractive-index depression at the center of the fiber core. The combination of a relatively hard jacket and a thick isolation layer made of soft material is found to be effective in reducing the mode coupling among samples investigated.

© 1982 Optical Society of America

Measurements of mode conversion coefficients in graded-index fibers

Kazuo Nagano and Shojiro Kawakami
Appl. Opt. 19(14) 2426-2434 (1980)

Mode coupling effects in a graded-index fiber cable

Masaharu Ohashi, Ken-ichi Kitayama, and Shigeyuki Seikai
Appl. Opt. 20(14) 2433-2438 (1981)

Measurement of the core diameter of graded-index optical fibers: an interlaboratory comparison

Ernest M. Kim and Douglas L. Franzen
Appl. Opt. 21(19) 3443-3450 (1982)

Effects of depressed cladding on the transmission characteristics of single-mode fibers with graded-index profiles

U. C. Paek, G. E. Peterson, and A. Carnevale
Appl. Opt. 21(19) 3430-3436 (1982)

Measurement of mode conversion coefficients and mode dependent losses in a multimode fiber

Mitsunobu Miyagi, Shojiro Kawakami, Masaharu Ohashi, and Shigeo Nishida
Appl. Opt. 17(20) 3238-3244 (1978)