Title :
Coupling between angled-facet amplifiers and tapered lens-ended fibers
Author :
Wang, Zheng ; Mikkelsen, Benny ; Pedersen, Bo ; Stubkjaer, Kristian E. ; Olesen, Dennis S.
Author_Institution :
Electromagn. Inst., Tech. Univ. of Denmark, Lyngby, Denmark
fDate :
1/1/1991 12:00:00 AM
Abstract :
The coupling between angled facet amplifiers and tapered lens-ended fibers is investigated theoretically and experimentally. The theoretical investigation is based on a three-dimensional plane wave model which accounts for the phase differences introduced by the angled facets. The coupling is investigated with respect to the beam parameters of the amplifier waveguide and the tapered lens-ended fiber, and with respect to the fiber position. The excess coupling losses due to the facet angle and to the variation of the fiber lens radius are investigated theoretically and found to be in good agreement with experimental results. For optimized lens radii, the excess loss for a 10° facet angle is found to be less than 0.5 dB compared to a normal facet amplifier
Keywords :
fibre optics; lenses; optical couplers; amplifier waveguide; angled-facet amplifiers; beam parameters; coupling; excess coupling losses; facet angle; fiber lens radius; fiber position; optimized lens radii; tapered lens-ended fibers; theoretical investigation; three-dimensional plane wave model; Broadband amplifiers; Electromagnetic waveguides; Electrooptical waveguides; Lenses; Optical amplifiers; Optical coupling; Optical fiber amplifiers; Optical losses; Optical waveguides; Reflectivity;
Journal_Title :
Lightwave Technology, Journal of
