Title :
High-efficiency two lens laser diode to single-mode fiber coupler with a silicon plano convex lens
Author :
Karstensen, Holger ; Frankenberger, Rudolf
Author_Institution :
Siemens AG, Munich, West Germany
Abstract :
A theory for the calculation of the spherical aberration loss of silicon planoconvex lenses is presented. The aberration losses are calculated as a function of the lens parameters. Furthermore, a theory for the coupling efficiency of a laser diode to single-mode fiber for a coupling arrangement consisting of a silicon planoconvex lens and a glass ball lens is given. The theoretical predictions are in good agreement with measurements. Experimentally, a coupling efficiency of 72% (1.4-dB coupling loss) was achieved for a laser diode with farfield angles of 20 degrees *33 degrees FWHM and a not yet fully optimized silicon planoconvex lens.<>
Keywords :
aberrations; elemental semiconductors; integrated optics; lenses; optical couplers; optical fibres; optical losses; semiconductor junction lasers; silicon; 1.4 dB; 72 percent; Si; glass ball lens; integrated optics; laser diode; lens parameters; plano convex lens; single-mode fiber coupler; spherical aberration loss; Diode lasers; Glass; Lenses; Optical coupling; Optical fiber couplers; Optical fiber theory; Optical receivers; Optical refraction; Refractive index; Silicon;
Journal_Title :
Lightwave Technology, Journal of
