Abstract

This paper describes improved design criteria for a highly stable angled physical contact (APC) connector with a slanted angle of 12 for a dispersion shifted optical fiber, which is derived from the theoretical considerations based on experiments. A shift of the vertex point of the convex ferrule endface from the optical fiber axis is minimized, so that compatibility among APC connectors can be established by using a new type of stepped-ferrule developed by the author. When rotation angle between the mating ferrules was less than 4 in a circular direction, the insertion losses for the improved APC connectors consisting of stepped-ferrules were 0.23 \pm0.45 dB, while the insertion losses for the conventional APC connectors consisting of tapered-ferrules measured 0.49 \pm0.89 dB. It can be confirmed that slanted angle of the convex ferrule endface is required to be 12 to obtain a backreflection of less than {-}60 dB for the dispersion shifted optical fiber at the wavelength of 1.550 \mum.

[IEEE ]

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