Abstract

It is demonstrated that light power may be converted from the guided LP₀₁ mode to the radiative LP₁₁ mode in single-mode optical fiber by using a periodic square-shaped distortion function. Coupling between these modes is measured directly as a function of distortion wavelengths and amplitudes for different optical wavelengths. The beating length between the modes (approximately 0.5 mm) becomes practical (1.5 mm and more) through the use of the higher harmonics of the distortion function.

© 1986 Optical Society of America

Fiber-optic modal coupler using periodic microbending

J. N. Blake, B. Y. Kim, and H. J. Shaw
Opt. Lett. 11(3) 177-179 (1986)

Sensitive determination of the existence of higher-order modes in a quasi-single-mode fiber

Y. Nakajima and S. Ezekiel
Opt. Lett. 11(12) 815-817 (1986)

Phase delay of coupled modes in single-mode optical fibers

H. Grebel
Opt. Lett. 12(9) 735-737 (1987)

Phase-velocity measurements using prism output coupling for single- and few-mode optical fibers

W. V. Sorin, B. Y. Kim, and H. J. Shaw
Opt. Lett. 11(2) 106-108 (1986)

Length dependence of LP₁₁ mode loss in the quasi-single-mode operating region

Makoto Tsubokawa, Nori Shibata, Masaharu Ohashi, and Shigeyuki Seikai
Opt. Lett. 11(5) 327-329 (1986)