Hi guys, Im Thava. Im working in optical communication. Currently I want to design a circuit to turn of couple of inputs to my laser. Say I have a supply of 5V to two pins of the laser, anode and cathode (pin 1 and pin 2). And then a bias current to another pin (pin 3). At some interval of time, I want to switch off the 5 V input to cathode and of course anode is grounded; also switch off the input bias current. The switching off time should be in about 100 kHz, and it should be controllable. It should be in a way that, if I supply a pulse with pulsewidth of 100 kHz, it should switch off exactly at the falling edge of the 100 kHz. Is it possible? And the switching time should vary, like I can always change the switching time. I just need some suggestions, ideas and discussion. I have so many ideas on doing it, but cant choose a proper way, so I just need some guidance. It will be much appreciated!! Thank you.