CO2 Laser Fiber Taper Profile Fabrication for Splice-Free Fiber Laser Arrays

We demonstrate the use of a CO
₂
laser for the fabrication of couplers in a double-core (DC) fiber for splice-free fiber laser arrays. We demonstrate couplers with an improved bandwidth (50 nm) and the fabrication of dual taper couplers in DC fibers with a possibility of relative phase adjustment in the cores of the fiber by elongating the fiber section between the tapers.