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An investigation of a tapered fiber-microsphere coupling system with gain and evanescent-field sensing device

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We consider a coupling system composed of a tapered fiber and a microsphere with gain. Power amplification and strong sensitivity to the absorbent sample molecule, on the surface of the sphere are found when gain is larger than intrinsic losses in this system. The intrinsic losses being in some extent compensated by gain make this system possess more advantage in integrated optics and photonics devices application.

Keywords: Microsphere; coupling; gain; tapered fiber

Document Type: Original Article


Affiliations: 1: Institute of Laser and Opto-Electronics, College of Opto-Electronics Information, Science and Technology Lab, Tianjin University, Tianjin 300072, China 2: Photonics Center, Institute of Physics, Nankai University, Tianjin 300071, China

Publication date: 2001-12-01

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