Hi Sahil SIngh…Its my reply to your comment ”
as already explained by aabid baba in the previous post that there are lot of filters present in the filter library itself both in optical as well as electrical domain including fabry parot , FBG can be used as filter, there are also bandpass. I would suggest you to choose one as per your requirement.As far Bessel filter is concerned it has flat group delay in the pass-band that is all the frequencies that are allowed to pass experience a constant delay and hence the fidelity of the signal at the output is maintained.”
You are right in saying that one has to use the filter as per one’s requirements and specifications. Next you talked about the bessel’s functions….. Bessels function is just a mathematical trignometric function. It is used for solving the equations that contain trignometric functions with in a function…It is frequently used in electronics and signal processing .
It is a type of analog linear filter with a maximally flat group/phase delay (maximally linear phase response), which preserves the wave shape of filtered signals in the passband. Bessel filters are often used in audio crossover systems.
In all these applications if the mathematical equation generated have trignometic functions as a function of trignometric function then Bessels function can be used in solving them.
Hope you query has been answered.
Regards.