Abstract

Experiments have been performed to evaluate the increase in loss due to an outer layer around the cladding in a multimode step-index fiber composed of core and cladding. Liquid has been used to simulate the outer layer. Measured excess loss for each mode group is in agreement with our previously developed electromagnetic theory. Total excess loss for all guided modes existing in the fiber has also been measured by varying the mode power distribution, the refractive index of the outer layer, the cladding thickness, and the wavelength. Results are found to be in good agreement with the theory, and it is concluded that the theory is correct.

© 1977 Optical Society of America

Excess loss caused by the outer layer in a multimode step-index optical fiber: theory

Norio Kashima, Naoya Uchida, and Yukinori Ishida
Appl. Opt. 16(10) 2732-2737 (1977)

Excess loss caused by a lossy outer layer in multimode optical fibers

Norio Kashima and Naoya Uchida
Appl. Opt. 16(4) 1038-1040 (1977)

Transmission characteristics of graded-index optical fibers with a lossy outer layer

Norio Kashima and Naoya Uchida
Appl. Opt. 17(8) 1199-1207 (1978)

Splice losses in step-index fibers: dependency on fiber-break angle

K. S. Gordon, E. G. Rawson, and R. E. Norton
Appl. Opt. 16(9) 2372-2374 (1977)

Microbending losses of doubly clad (W-type) optical fibers

Toshiki P. Tanaka, Shoji Yamada, Masao Sumi, and Koichi Mikoshiba
Appl. Opt. 16(9) 2391-2394 (1977)