We exploit a fiber puller to transform a telecom single-mode optical fiber with a 125 µm diameter into a symmetric and unbroken slightly tapered optical fiber with a 50 µm diameter at the minimum waist. When the laser light is launched into the optical fiber, we can observe that, due to the evanescent wave of the slightly tapered fiber, the nearby polystyrene microparticles with 10 µm diameters will be attracted onto the fiber surface and roll separately in the direction of light propagation. We have also simulated and compared the optical propulsion effects on the microparticles when the laser light is launched into a slightly tapered fiber and a heavily tapered (subwavelength) fiber, respectively.
Thursday, March 4, 2010
Using a slightly tapered optical fiber to attract and transport microparticles
Fang-Wen Sheu, Hong-Yu Wu, and Sy-Hann Chen
We exploit a fiber puller to transform a telecom single-mode optical fiber with a 125 µm diameter into a symmetric and unbroken slightly tapered optical fiber with a 50 µm diameter at the minimum waist. When the laser light is launched into the optical fiber, we can observe that, due to the evanescent wave of the slightly tapered fiber, the nearby polystyrene microparticles with 10 µm diameters will be attracted onto the fiber surface and roll separately in the direction of light propagation. We have also simulated and compared the optical propulsion effects on the microparticles when the laser light is launched into a slightly tapered fiber and a heavily tapered (subwavelength) fiber, respectively.
We exploit a fiber puller to transform a telecom single-mode optical fiber with a 125 µm diameter into a symmetric and unbroken slightly tapered optical fiber with a 50 µm diameter at the minimum waist. When the laser light is launched into the optical fiber, we can observe that, due to the evanescent wave of the slightly tapered fiber, the nearby polystyrene microparticles with 10 µm diameters will be attracted onto the fiber surface and roll separately in the direction of light propagation. We have also simulated and compared the optical propulsion effects on the microparticles when the laser light is launched into a slightly tapered fiber and a heavily tapered (subwavelength) fiber, respectively.
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