Abstract

We investigate a high-beam-quality (6+1)×1 signal and pump combiner with 50 μm core diameter of the output fiber based on the tapered-fused fiber bundle technique for the first time. The influence of taper ratio of the taper bundle for different mode proportions of the output fiber and the transition efficiency of the signal light are analyzed numerically. In the experiment, a signal fiber core diameter matching from 10 to 50 μm in the combiner is achieved. We experimentally demonstrate that the total 1018 nm pump efficiency of the combiner is >98% and the signal light insertion loss is less than 2%, with a beam quality factor M2 of 1.59. Also, we have set up an amplifier based on the combiner, whose output laser power can achieve 2340 W with the slope efficiency of 73.76%. The beam quality factor M2 of the output laser is 2.83 at the maximum power output, and a high beam quality is maintained when a large-mode-area fiber is employed in the laser system.

© 2019 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
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)

Combined supercontinuum source with >200 W power using a 3 × 1 broadband fiber power combiner

H. Zhou, A. Jin, Z. Chen, B. Zhang, X. Zhou, S. Chen, J. Hou, and J. Chen
Opt. Lett. 40(16) 3810-3813 (2015)

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)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription