Experimental research of end-cap splicing technique for double-cladfibers based on CO2 laser

YE Chang-geng; YAN Ping; OU Pan; GONG Ma-li

End-cap is effective for avoiding the fiber facet damage of pulsed double-clad fiber lasers under high peak power.In order to achieve end-cap assembling of large diameter double-clad fibers with low cost,a fiber end-cap splicing system based on a CO2 laser was designed and built.The method and process of fiber end-cap assembling was studied.The quality of the end-cap was evaluated by testing a high-peak-power pulsed fiber laser,which was assembled with end-caps using our method.The experimental results show that high-quality low-cost splicing of end-caps on double-clad fibers can be achieved by our splicing system.The end-cap spliced by our method can evidently increase the damage threshold of the fiber.Meanwhile,the influence of the end-cap on the efficiency and beam quality of the laser output is not obvious.

Corresponding author: GONG Ma-li, gongn@mail.tsinghua.edu.cn

1. Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China;

2. School of Instrument Science and Opto-electronic Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

Received Date: 2006-11-24

Accepted Date: 2006-12-18

Available Online: 2007-10-25

Abstract: End-cap is effective for avoiding the fiber facet damage of pulsed double-clad fiber lasers under high peak power.In order to achieve end-cap assembling of large diameter double-clad fibers with low cost,a fiber end-cap splicing system based on a CO2 laser was designed and built.The method and process of fiber end-cap assembling was studied.The quality of the end-cap was evaluated by testing a high-peak-power pulsed fiber laser,which was assembled with end-caps using our method.The experimental results show that high-quality low-cost splicing of end-caps on double-clad fibers can be achieved by our splicing system.The end-cap spliced by our method can evidently increase the damage threshold of the fiber.Meanwhile,the influence of the end-cap on the efficiency and beam quality of the laser output is not obvious.

HTML

Reference (11)

[1]	ZENG H,XIAO F.The development of Yb-doped double-clad fiber laser and its application[J].Laser Technology,2006,30(4):438～441(in Chinese).
[2]	JEONG Y,SAHU J K,PAYNE D N et al.Ytterbium-doped large-core fiber laser with 1.36kW continuous-wave output power[J].Optics Express,2004,12(25):6088～6092.
[3]	BABUSHKIN A,PLATONOV N S,GAPONTSEV V P.Multi-kilowatt peak power pulsed fiber laser with precise computer controlled pulse duration for materials processing[J].Proc SPIE,2005,5709:98～102.
[4]	MARYASHIN S,UNT A,GAPONTSEV V P.10mJ pulse energy and 200W average power Yb-doped fiber laser[J].Proc SPIE,2006,6102:61020O-1～61020O-5.
[5]	FARROW R L,KLINER D A V,SCHRADER P E et al.High-peak-power 1.2MW pulsed fiber amplifier[J].Proc SPIE,2006,6102:61020L-1～61020L-11.
[6]	di TEODORO F,BROOKS C D.Multistage Yb-doped fiber amplifier generating megawatt peak-power,subnanosecond pulses[J].Opt Lett,2005,30(24):3299～3301.
[7]	YE Ch G,GONG M L,YAN P et al.Linearly-polarized single-transverse-mode high-energy multi-ten nanosecond fiber amplifier with 50W average power[J].Optics Express,2006,14(17):7604～7609.
[8]	KOECHNER W.Solid-state laser engineering[M].5th ed,Berlin:Springer,1999.667～686.
[9]	LIMPERT J,HOFFER S,LIEM A et al.100W average-power high-energy nanosecond fiber amplifier[J].Appl Phys,2002,B75(4/5):477～479.
[10]	EGASHIRA K,KOBAYASHI M.Optical fiber splicing with a low-power CO2 laser[J].Appl Opt,1977,16(6):1636～1638.
[11]	KOPLOW J P,KLINER D A V,GOLDBERG L.Single-mode operation of a coiled multimode fiber amplifier[J].Opt Lett,2000,25(7):442～444.

Experimental research of end-cap splicing technique for double-cladfibers based on CO2 laser

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Proportional views