Side coupler applied in a multi-pumped Yb-doped triple-clad fiber laser

Dong Fanlong1; Zhang Xinhai1; Song Feng2

2018-12

10.1088/1555-6611/aae185

LASER PHYSICS   影响因子和分区

1054-660X

1555-6611

A ytterbium (Yb)-doped side multi-pumped fiber amplifier operating at 1.08 mu m is demonstrated. Firstly, we present a novel (2 + 1) x 1 side-pumped fiber coupler which is fabricated by two tapered 105/125 mu m double-clad fibers and a 20/50/400 mu m triple-clad Yb-doped fiber and the relationship between the fused depth and coupling efficiency is analyzed. Secondly, a new method is adopted to fabricate the (2 + 1) x 1 side coupler. The coupling efficiency of the side coupler for a 975 nm pump light can reach up to 95% and the signal light insertion loss is less than 0.04 dB. Then, four (2 + 1) x 1 side-pump couplers are fabricated on a 25 m long triple-clad gain fiber in sequence. Based on these couplers, an all-fiber side multi-pumped fiber amplifier with an output power of 645 W and optical-optical efficiency of 65% is achieved in the experiment. In addition, the scheme ensures that the temperature of the fiber is reduced to meet safety levels. Finally, by increasing the number of the side couplers to improve the pump power, the output power of the amplifier will be higher.

fiber amplifier triple-clad fiber side multi-pumping fiber coupler

SCI ; EI

英语

第一 ; 通讯

[KQCX2015033110182368]

Optics ; Physics

Optics ; Physics, Applied

WOS:000446928200002

IOP PUBLISHING LTD

20184506047417

Efficiency ; Fiber lasers ; Fibers ; Pumping (laser)

Lasers, General:744.1 ; Solid State Lasers:744.4 ; Production Engineering:913.1

PHYSICS

Web of Science

1.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
2.Nankai Univ, Key Lab Weak Light Nonlinear Photon, Minist Educ, Tianjin 300457, Peoples R China

Dong Fanlong,Zhang Xinhai,Song Feng. Side coupler applied in a multi-pumped Yb-doped triple-clad fiber laser[J]. LASER PHYSICS,2018,28(12).

Dong Fanlong,Zhang Xinhai,&Song Feng.(2018).Side coupler applied in a multi-pumped Yb-doped triple-clad fiber laser.LASER PHYSICS,28(12).

Dong Fanlong,et al."Side coupler applied in a multi-pumped Yb-doped triple-clad fiber laser".LASER PHYSICS 28.12(2018).