Hi Abid, Its a reply to your comment ”
As far as i am concerned there are many filters used and that too as per requirement of the design. You have mentioned about low pass bessel but there are lot of filters present in the filter library itself both in optical as well as electrical domain. Others include fabry parot , FBG can be used as filter, there are also bandpass. I would suggest you to choose one as per your requirement.”
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.