| Linearly polarised three-colour lasing emission from an evanescent wave pumped and gain coupled fibre laser |
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| 作者姓名： | 普小云 江楠 韩德昱 冯永利 任一涛 |
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| 作者单位： | Department of Physics, Yunnan University, Kunming 650091, China;Department of Physics, Yunnan University, Kunming 650091, China;Department of Physics, Yunnan University, Kunming 650091, China;Department of Physics, Yunnan University, Kunming 650091, China;Department of Physics, Yunnan University, Kunming 650091, China |
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| 基金项目： | Project supported by the National
Natural Science Foundation of China (Grant Nos. 60877037 and
10564005). |
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| 摘 要： | A novel Whispering-Gallery-Mode(WGM) fibre laser,emitting linearly polarised three-colour light,is demonstrated by pumping and gain coupling with evanescent waves.The pump light is longitudinally coupled into a bare optical fibre immersed in a dye solution of lower refractive index.The dye molecules around the bare fibre are excited by the evanescent waves of pump light when they propagate along the fibre in a total internal reflection.When the pump beam within the fibre is a meridian beam,the WGM lasing emission from the fibre laser is a linearly polarised transverse electric wave,while it is a mixed wave of the linearly polarised transverse electric and magnetic waves if the pump beam is a skew beam within the fibre.Because the excited molecules are located within the evanescent field of WGM,a good spatial overlap between the dye gain and the evanescent field leads to a high pumping efficiency and a longer gain distance along the fibre.Once the bare fibre is inserted into three glass capillaries filled with Rhodamine 6G,610 and 640 dye solutions,respectively,WGM laser oscillations at the wavelengths of 567-575,605-614 and 656-666 nm occur simultaneously,and a linearly polarised three-colour lasing emission is achieved in a single optical fibre.
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| 关 键 词： | fibre laser Whispering-Gallery-Mode evanescent wave polarisation |
| 收稿时间： | 2009-08-24 |
Linearly polarised three-colour lasing emission from an evanescent wave pumped and gain coupled fibre laser |
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| Pu Xiao-Yun,Jiang Nan,Han De-Yu,Feng Yong-Li and Ren Yi-Tao.Linearly polarised three-colour lasing emission from an evanescent wave pumped and gain coupled fibre laser[J].Chinese Physics B,2010,19(5):54207-054207. |
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| Authors: | Pu Xiao-Yun Jiang Nan Han De-Yu Feng Yong-Li and Ren Yi-Tao |
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| Affiliation: | Department of Physics, Yunnan University, Kunming 650091, China |
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| Abstract: | A novel Whispering--Gallery--Mode (WGM) fibre laser,
emitting linearly polarised three-colour light, is demonstrated by
pumping and gain coupling with evanescent waves. The pump light is
longitudinally coupled into a bare optical fibre immersed in a dye
solution of lower refractive index. The dye molecules around the
bare fibre are excited by the evanescent waves of pump light when
they propagate along the fibre in a total internal reflection. When
the pump beam within the fibre is a meridian beam, the WGM lasing
emission from the fibre laser is a linearly polarised transverse
electric wave, while it is a mixed wave of the linearly polarised
transverse electric and magnetic waves if the pump beam is a skew
beam within the fibre. Because the excited molecules are located
within the evanescent field of WGM, a good spatial overlap between
the dye gain and the evanescent field leads to a high pumping
efficiency and a longer gain distance along the fibre. Once the bare
fibre is inserted into three glass capillaries filled with Rhodamine
6G, 610 and 640 dye solutions, respectively, WGM laser oscillations
at the wavelengths of 567--575, 605--614 and 656--666~nm occur
simultaneously, and a linearly polarised three-colour lasing
emission is achieved in a single optical fibre. |
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| Keywords: | fibre laser Whispering--Gallery--Mode evanescent wave polarisation |
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