【摘要】 将石英光纤浸入低折射率的染料溶液中后构成圆柱形微腔.采用轴向光抽运消逝波激励激光增益的方式,使增益区域局限在圆柱形微腔回音壁模式的模场区域内,由此显著地提高了抽运效率,增加了沿光纤轴向的增益长度.在一根石英光纤的轴向分段填入浓度同为2×10-3mol/L的罗丹明6G和罗丹明B乙醇溶液,在567—576nm和592—600nm的两个波长范围内同时获得回音壁模式的激光辐射;分段填入浓度为8×10-4和8×10-3mol/L的罗丹明B乙醇溶液,在588—595nm和600—618nm的两个波长范围内同时获得回音壁模式的激光辐射.在同一根光纤中实现了两种不同波长范围的回音壁模式激光辐射,由此形成一种新型的光纤激光器———双波段回音壁模式光纤激光器.更多还原

【Abstract】 A cylindrical micro-cavity was made by immersing a silica optical fiber into a low refractive index dye solution.Pumped by evanescent wave along the fiber axis,dye gain was confined in the evanescent field of whispering gallery mode(WGM)of the fiber,which led to a high pumping efficiency and a long gain distance along the fiber axis.When the fiber was immersed into Rhodamine 6G and Rhodamine B dye solution with the same concentration of 8×10-4mol/L but separated to two parts,WGM laser emissions in the wavelength ranges of 567—576nm and 592—600nm were observed;when immersed into Rhodamine B dye solution with two concentrations of 8×10-4 and 8×10-3mol/L,WGM laser emissions in the wavelength ranges of 588—595nm and 600—618nm were observed.WGM laser emission in two different wavelength ranges in a single optical fiber was realised,which formed a new kind of WGM laser,the two-wavelength-range WGM fiber Laser.更多还原