Title :
Confinement factors and gain in optical amplifiers
Author :
Visser, T.D. ; Blok, H. ; Demeulenaere, B. ; Lenstra, D.
Author_Institution :
Dept. of Phys. & Astron., Free Univ., Amsterdam, Netherlands
fDate :
10/1/1997 12:00:00 AM
Abstract :
A new identity is derived which relates the gain and the field distribution (or confinement factor) in a dielectric waveguide with complex refractive indices. This identity is valid for any guided mode of waveguides with an arbitrary cross section. It provides a new check of the accuracy of mode solvers. Also, it can be used in a variational approach to predict the gain or loss of a guided mode based on knowledge of confinement factors. It is shown that a previous analysis that is often used, is not correct. In addition, approximate expressions for the gain in slab waveguides are presented
Keywords :
laser theory; light polarisation; optical planar waveguides; optical waveguide theory; semiconductor lasers; travelling wave amplifiers; variational techniques; waveguide lasers; arbitrary cross section; complex refractive indices; confinement factor; dielectric waveguide; field distribution; gain; guided mode; mode solvers; optical amplifiers; planar waveguides; polarization sensitivity suppression; semiconductor traveling-wave amplifier; slab waveguides; variational approach; Electromagnetic waveguides; Optical amplifiers; Optical refraction; Optical sensors; Optical variables control; Optical waveguides; Semiconductor optical amplifiers; Semiconductor waveguides; Space technology; Stimulated emission;
Journal_Title :
Quantum Electronics, IEEE Journal of
