Abstract

A side-pump coupler with a refractive index valley was investigated theoretically and experimentally. The high pump coupling efficiency and the suppression of backward light propagation due to the refractive index valley are illustrated. Based on the analysis, the $(2+1) \times 1$ pump and signal coupler with both pump coupling efficiency and signal transfer efficiency of $> 96\%$ and the BR of 2.82 was implemented, which accompanied with the maximum pump power of 398 W. And based on these couplers, an all-fiber bi-directionally pumping MOPA laser with an output power of 256 W and optical-optical efficiency of 80.5% was achieved in the experiment.

© 2013 USGov

Investigation of a twisting-fused side-pump coupler based on tellurite fiber

Guanghui Wang, Yongteng Xia, Lingling Yang, Lulu Xu, Yuzhou Pan, Shixun Dai, Yingying Wang, Xunsi Wang, Peiqing Zhang, and Zijun Liu
Opt. Express 32(9) 15156-15165 (2024)

Side-pump combiner for all-fiber monolithic fiber lasers and amplifiers

Cesar Jauregui, Steffen Böhme, Georgios Wenetiadis, Jens Limpert, and Andreas Tünnermann
J. Opt. Soc. Am. B 27(5) 1011-1015 (2010)

Fluoride-fiber-based side-pump coupler for high-power fiber lasers at 2.8  μm

C. A. Schäfer, H. Uehara, D. Konishi, S. Hattori, H. Matsukuma, M. Murakami, S. Shimizu, and S. Tokita
Opt. Lett. 43(10) 2340-2343 (2018)

Fabrication of a tellurite-fiber-based side-pump coupler based on the tapered-fused method

Yongteng Xia, Lingling Yang, Fan Yang, Lulu Xu, Yue Fu, Shixun Dai, Shiliang Kang, Xunsi Wang, Peiqing Zhang, Zijun Liu, and Wei Ran
Opt. Express 31(8) 13169-13181 (2023)

Beam quality degradation of signal light in a side pumping coupler with a large-mode-area signal fiber

Chengmin Lei, Zilun Chen, Huan Yang, Yanran Gu, and Jing Hou
Opt. Express 27(10) 14041-14053 (2019)