hi aabid baba..
thank you for showing concern..
actually i am studying the output of a laser by changing bit rate and input bias current. At this current i.e.10mA when i am changing the bit rate to higher rates the eye diagram is getting worse and there is no distinction between marks and spaces.Also the BER is very high and quality factor is also very low.
Hope you will find some find to respond to my query.
with regards