ASYMMETRIC OPTICAL FIBER COUPLER

摘要

There is described an optical fiber coupler in which at least one fiber is a multiple-clad fiber, containing a single-mode core supporting a single guiding mode and an inner multi-mode cladding guiding multiple modes. The multiple-clad fiber is fused with a second fiber of a different etendue to create an optical fiber coupler having an enhanced multi-mode signal transmission.

主权项

1. An optical fiber coupler comprising:
a first optical fiber having a first cross-talk portion located between a first end and a second end, and having a first single-mode core, at least one inner multi-mode cladding, and a first outer cladding, the first cross-talk portion having a first etendue; a second optical fiber having a second cross-talk portion located between a third end and a fourth end, the second cross-talk portion having a second etendue, the second etendue forming an etendue ratio differing from one relative to the first etendue; and a coupling region where the first cross-talk portion is optically coupled to the second cross-talk portion; wherein the etendue ratio is indicative of a transmission of a multi-mode signal between the second end of the first optical fiber and the third end of the second optical fiber.