Abstract
The launching efficiencies of the HE1m modes and the over-all launching efficiency are calculated for the cases in which a self-focusing optical fiber is excited axially by a TEM0n beam mode or by a beam consisting of several beam modes. It is shown that, when the fiber is excited by a TEM00 mode whose spot size s is very large compared with the characteristic spot size so of the fiber, the HE1m modes are almost equally excited and that, if s is matched to so, the over-all launching efficiency is nearly 100%. The over-all launching efficiency as well as the launching efficiencies of the HE1m modes decrease considerably when the fiber is excited by a beam containing the TEM01 mode that is out of phase with the TEM00 mode. The effect of the off-axis excitation by a TEM00 mode on the over-all launching efficiency is also examined.
© 1975 Optical Society of America
Full Article | PDF ArticleMore Like This
Masaaki Imai and Elmer H. Hara
Appl. Opt. 14(1) 169-173 (1975)
Masaaki Imai and Elmer H. Hara
Appl. Opt. 13(8) 1893-1899 (1974)
M. Mostafavi, T. Itoh, and R. Mittra
Appl. Opt. 14(9) 2190-2193 (1975)