Effective Core Area - Fiber Optic Meaning

[n0_3sc]

What does the "effective core area" of a fibre (or fiber) optic mean?

 

[Astronuc]

Ostensibly, it is the area of a fiber bundle through which the light is actually transmitted as opposed to the structure and gaps between individual fibers in which light is not transmitted.

 

[n0_3sc]

The area of the fibre bundle

You mean cross-sectional area?
If so, to find this quantity it would be governed by your input beam width I assume, since the physical core area will be larger than the effective core area?

If my above comments are right, then do I need to find the FWHM of my beam and use that to calculate the cross sectional area?

 

[Astronuc]

My initial thought on "effective core area" seems incorrect. The following talk about "effective core area of one fiber", but I believe my thought on the cross-sectional area that transmits light as opposed to the structural or physical fiber cross-sectional area as being the "effective core area" seems correct.

Bismuth-based optical fiber
http://www.ofcnfoec.org/materials/PDP26-1502.PDF

See this discussion regarding core area.
http://www.patentstorm.us/patents/6516123-description.html


www.osti.gov/energycitations/servlets/purl/10144448-jhgn9K/native/10144448.PDF


2.3. Effective Cross-sectional Area (maybe effective core area)
http://ceta.mit.edu/PIER/pier73/13.07040201.Singh.S.pdf



This might be of interest, but one has to buy it.
Enlargement of effective core area on dispersion flattened fiberand its low nonlinearity
http://ieeexplore.ieee.org/Xplore/login.jsp?url=/iel4/5284/14321/00657419.pdf?arnumber=657419


Relationship between nonlinear effective core area and backscattering capture fraction for single mode optical fibres
http://ieeexplore.ieee.org/Xplore/login.jsp?url=/iel1/2220/10465/00491076.pdf?arnumber=491076


R. H. Stolen, "Relation between the effective area of a single-mode fiber and the capture fraction of spontaneous Raman scattering ," J. Opt. Soc. Am. B 19, 498-501 (2002)
http://www.opticsinfobase.org/viewmedia.cfm?id=68267&seq=0

A reference in this matter if found in -
G. P. Agrawal, Nonlinear fiber optics, San Diego: Academic Press, 1995

Then again someone here should have the answer - Professor Agrawal's Nonlinear Fiber Optics Group
http://www.optics.rochester.edu/workgroups/agrawal/grouphomepage.php