Fundamental Fiber Mode and Glass Properties

The fundamental fiber mode is described by Bessel and Hankel function of order 0, not by a Gaussian. The quality of this fit is wavelength dependent. A comparison of amplitude versus radial coordinate is given in Fundamental Fiber Physics.qpw (Quattro format-Bessel and Hankel functions are supported allowing recalculation of the fundamental mode) or Fundamental Fiber Physics.xls (Excel format).

For ZEMAX users: To use the fundamental mode in the POP analysis, the appropriate dll must be loaded into the ZEMAX/POP/dll folder. Both the compiled dll and the source code are included here.

Also, in various problems, both Herasil and SMF-28 are invoked as glass names. ZEMAX users should place these glass files in the ZEMAX/Glasscat directory before running the examples. OSLO and CODE V users can create private glasses with the information provided. OpTaliX users can use the files as-is; SMF-28 is a private glass and Herasil is a standard glass.