The University of Arizona

Tipd, LLC

Leonid Kotov

Nasser N Peyghambarian

Valery Temyanko

A gain fiber assembly for use in optical fiber amplification systems such as fiber amplifiers and fiber lasers utilizes an active or 'bare' fiber that has a single glass cladding with an outer diameter of less is less than 80 &#x3bc;m and preferably less than 60 &#x3bc;m or even 40 &#x3bc;m. A passive double-clad input fiber is stripped of the outer cladding and tapered to match the outer diameter of the bare fiber. A glass-fluid or glass-vacuum interface along the taper provides guidance of the pump into and along the cladding of the bare fiber and a NA&#x3e;1 for a vacuum or gasses and an NA&#x3e;0.8 for liquids. This allows for much shorter fiber lengths to reach max signal power and higher pump conversion efficiencies.

Growing community of inventors

Tucson, AZ, United States of America

Leonid Kotov