hi aabid and alistu,
thanks for your reply
i got it abit.
suppose in simple design where we have TX, channel and Rx. now if i will increse the length of fiber, the eye opening will become smaller and smaller.
now i have to increase power at the tranmitter end so as to get the original eye opening. this may be called eye opening penalty due to increse in length.
am i right alistu?
with regards