Abstract

Integrated fiber components enable compact and robust laser systems but are usually not available with specialty fibers. However, specialty fibers allow power scaling of fiber lasers and amplifiers with all advantages of these fiber designs. In this context, chirally-coupled-core fibers show promising properties for optical fiber components. In this paper, we present the development of a highly-integrated signal and pump combiner in chirally-core-fibers using a side-pumping technology. Combining up to four fiber-coupled pump diodes, a pump-light limited power handling of 600 W can be achieved with an efficiency of 78%. The combiner was tested in a side-pumped single-frequency all-fiber amplifier but can also be implemented in almost any fiber laser or amplifier.

CO₂-laser-ablation-assisted fabrication of signal-pump combiners with chirally coupled core fibers for co- and counter-pumped all-fiber amplifiers

Eike Brockmüller, Felix Wellmann, Daniel Lutscher, Ossi Kimmelma, Tyson Lowder, Steffen Novotny, Roland Lachmayer, Jörg Neumann, and Dietmar Kracht
Opt. Express 30(15) 25946-25957 (2022)

Pump and signal combiner for bi-directional pumping of all-fiber lasers and amplifiers

Thomas Theeg, Hakan Sayinc, Jörg Neumann, Ludger Overmeyer, and Dietmar Kracht
Opt. Express 20(27) 28125-28141 (2012)

Pump-signal combiner with large-core signal fiber feed-through for fiber lasers and amplifiers

Qirong Xiao, Pin Yan, Haicui Ren, Xiao Chen, and Mali Gong
Appl. Opt. 52(3) 409-414 (2013)

Ultra-low-crosstalk multicore fiber-integrated pump-signal combiner for a core-pumped EDFA

Victor I. Kopp, Jongchul Park, Jing Zhang, and Daniel Neugroschl
Opt. Express 31(10) 16434-16441 (2023)

Single-frequency chirally coupled-core all-fiber amplifier with 100 W in a linearly polarized TEM₀₀ mode

Sven Hochheim, Michael Steinke, Peter Wessels, Omar de Varona, Joona Koponen, Tyson Lowder, Steffen Novotny, Jörg Neumann, and Dietmar Kracht
Opt. Lett. 45(4) 939-942 (2020)