Study of fundamental mode output of a coiled multimode Yb 3+-doped double-cladding fiber amplifier

Chun Xiang Yang*, Su Hui Yang, Xin Peng Sun, Chang Ming Zhao

*此作品的通讯作者

科研成果: 书/报告/会议事项章节会议稿件同行评审

1 引用 (Scopus)

摘要

The composition of modes in double-clad multimode active fiber is studied, The bending influence on numerical apertures of fibers is analyzed by means of geometrical optics, When the optical fiber is bent, different modes have different bending losses, A numerical simulation was used to calculate the bending losses of LP01 and LP11 in different bending radii, Optimum bending radius was chosen to inhibit the high-order modes so that the fundamental mode signal amplification was assured, A 10 meters long Yb 3--doped double-cladding fiber with core diameter of 30μm and core numerical aperture of 0.06 was used to verify our theoretical calculation. The fiber amplifier was pumped by a diode laser array emitting at 976nm. A non-planar ring oscillator with cw single frequency output at 1064 nm was used as signal source. By coiling the double-cladding fiber, the amplified signal of fundamental mode was obtained. When the pump power was 49.6 W and the signal power was 200 mW, 16.1W of single frequency output power was obtained, the amplification factor was 80.5, The spectra of output signals before and after amplification were measured with Fabry-Perot interferometer, Fundamental mode output is verified.

源语言英语
主期刊名International Symposium on Photoelectronic Detection and Imaging 2007
主期刊副标题Related Technologies and Applications
DOI
出版状态已出版 - 2008
活动International Symposium on Photoelectronic Detection and Imaging, ISPDI 2007: Related Technologies and Applications - Beijing, 中国
期限: 9 9月 200712 9月 2007

出版系列

姓名Proceedings of SPIE - The International Society for Optical Engineering
6625
ISSN(印刷版)0277-786X

会议

会议International Symposium on Photoelectronic Detection and Imaging, ISPDI 2007: Related Technologies and Applications
国家/地区中国
Beijing
时期9/09/0712/09/07

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