A Study on Optical Coupling between Laser Diodes and Photonic Crystal Fibers
Date Issued
2005
Date
2005
Author(s)
Peng, Zih-Syuan
DOI
en-US
Abstract
In this thesis, we propose a coupling scheme for improving the coupling efficiency of photonic crystal fibers. In this scheme, the optical fiber used is a single-mode photonic crystal fiber, which is connected with a tapered fiber lens for efficiently collecting the light from a laser diode. The best coupling efficiency so far is 46 %, 4 times more in comparison with butt coupling. We also discuss the dependence of this coupling scheme on wavelengths, and measure the beam property when laser light emitting from the photonic crystal fiber.
In the simulations, we use the Gaussian beam property, ABCD matrix law and beam-propagation method to analyze the beam waist of the light source, the shapes of the fiber lenses, and their influences on coupling behavior. And we also verified the validity of the calculated field of the photonic crystal employed in such simulation of optical coupling. The beams from the lensed photonic crystal fibers have similar behaviors as Gaussian beams, but the data gotten from the measurement and the theory are still discrepant.
Subjects
光耦合
光子晶體光纖
光纖透鏡
光束傳播法
Optical Coupling
Photonic Crystal Fiber
Fiber lens
Beam-Propagation Method
Type
thesis
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