Laser diode to single-mode circular core dispersion-shifted/dispersion-flattened fiber excitation via hyperbolic microlens on the fiber tip: Prediction of coupling efficiency by ABCD matrix formalism

摘要: Abstract The formulated ABCD matrix formalism is employed to prescribe analytical expression of coupling efficiency a laser diode single-mode circular core dispersion-shifted as well dispersion-flattened fiber via hyperbolic microlens on the tip fiber. We assume that field distribution in case both source and one parameter Gaussian type. For maximum excitation efficiency, it required lens transmitted spot size should match with Further, regards fiber, we use Petermann II order take care non nature such fibers make estimations more realistic thereby. investigations are carried out for two different wavelengths 1.3 1.5 μm. Our simple method predicts concerned optics excellently necessary evaluations require little computations. This but accurate technique expected benefit system designers who work optical technology.