Patent ID: 9722388
Date: 2017-08-01
CPC Classifications: G02B,H01S

Claim:
1. A multi-core optical amplifying fiber device comprising: first and second multi-core optical amplifying fibers each including a plurality of core portions and a cladding portion formed at outer peripheries of the core portions; and a connection portion connecting the core portions of the first and second multi-core optical amplifying fibers to one another, wherein the core portions of the first multi-core optical amplifying fiber are doped with amplification medium, the core portions of the second multi-core optical amplifying fiber comprise a first core portion doped with amplification medium and a second core portion not doped with amplification medium, and the connection portion connects the core portions to restrain deviation, between every connected core portions, of amplification gain for a total length of the core portions connected one another with respect to deviation of amplification gain between every connected core portions of the first multi-core optical amplifying fiber.