Efficiency of pump absorption in double-clad fiber amplifiers. II. Broken circular symmetry
Abstract
Absorption of an incoherent pump in a double-clad fiber amplifier is analyzed in the paraxial wave approximation. Different inner cladding shapes are considered. A small spiral distortion of an otherwise circular inner cladding shape is shown to enhance the coupling efficiency significantly relative to other geometries.
- Publication:
-
Journal of the Optical Society of America B Optical Physics
- Pub Date:
- June 2002
- DOI:
- 10.1364/JOSAB.19.001259
- Bibcode:
- 2002JOSAB..19.1259K
- Keywords:
-
- Broken Symmetry;
- Cladding;
- Couplers;
- Electromagnetic Absorption;
- Fiber Lasers;
- Fiber Optics;
- Optical Fibers;
- Optical Pumping;
- Lasers and Masers