Abstract

The measuring method of the mode coupling coefficient was developed to apply to multimode fibers. It is shown that a mode coupling coefficient can be calculated from each mode group pulse waveform. Measurements were made with two cases of long-length and short-length multimode step-index fibers. As a result, it was observed that in the fiber sheathed by nylon, there existed a strong mode coupling in lower order modes. When it is assumed that this mode coupling is generated by microbendings, the correlation length and standard deviation of the curvature were estimated as 2.0 mm and 4.2 × 10⁻⁴ mm⁻¹, respectively.

© 1978 Optical Society of America

Mode mixing effects in optical fibers caused by sheathing and multistranding: measurements

Kenichi Kitayama and Masahiro Ikeda
Appl. Opt. 17(22) 3660-3664 (1978)

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)

Measurements of mode conversion coefficients in graded-index fibers

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

Mode conversion coefficients in optical fibers

W. A. Gambling, D. N. Payne, and H. Matsumura
Appl. Opt. 14(7) 1538-1542 (1975)

Calculation of the coupling coefficient in step index glass optical fibers

Svetislav Savović and Alexandar Djordjevich
Appl. Opt. 48(22) 4496-4500 (2009)