I want to calculate the density fluctuation in an optical wire where a media is embedded in a cladding that can be considered infinite (for now).
I have found reference on how to do it in optical fibre where the core and cladding are considered the same therefore simplifying greatly the calculation.
In my case, I don't think that assumption is correct and indeed the result is off the experimental value.
ref: Noise in interferometric Optical Systems: An optical Nyquiest Theorem by William H. Glenn IEEE JQE, vol25, n 6, 1989.
any idea on how to proceed?