Microfiber knot dye laser based on the evanescent-wave-coupled gain

The authors demonstrate a composite microring laser formed by immersing a silica microfiber knot in a rhodamine 6G dye solution. When the dye molecules are evanescently pumped by 532 nm wavelength laser pulses guided along a 350 μ m diameter knot, lasing oscillation occurs inside the evanescently co...

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Bibliographic Details
Published in:Applied physics letters 2007-06, Vol.90 (23), p.233501-233501-3
Main Authors: Jiang, Xiaoshun, Song, Qinghai, Xu, Lei, Fu, Jian, Tong, Limin
Format: Article
Language:English
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Summary:The authors demonstrate a composite microring laser formed by immersing a silica microfiber knot in a rhodamine 6G dye solution. When the dye molecules are evanescently pumped by 532 nm wavelength laser pulses guided along a 350 μ m diameter knot, lasing oscillation occurs inside the evanescently coupled closed-ring microcavity with a linewidth of about 0.06 nm . Laser emission around 570 and 580 nm wavelengths, which is evanescently coupled back into the microfiber, is observed with a threshold of about 9.2 μ J ∕ pulse . The use of the microfiber knot cavity suggests a convenient and efficient approach to both pumping and collection of the evanescent-wave-coupled dye laser.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2746935