newhand
Member level 1
hi guys:
Now I am designing a laser driver's automatic power control circuit which is called APC in short .I have read some articles about laser driver circuit.But I don't understand is:
Suppose the temperature doesn't change and I(bias)=30mA,I(mod_pp)=10mA,
I(bias)=bias current for laser diode.
I(mod_pp)=modulation peak-to-peak current for laser diode.
how the laser driver keeps constant power while the amplitude of I(mod) is changing???
Can anyone know or tell me some article about this,thanks very much!
[/b]
Now I am designing a laser driver's automatic power control circuit which is called APC in short .I have read some articles about laser driver circuit.But I don't understand is:
Suppose the temperature doesn't change and I(bias)=30mA,I(mod_pp)=10mA,
I(bias)=bias current for laser diode.
I(mod_pp)=modulation peak-to-peak current for laser diode.
how the laser driver keeps constant power while the amplitude of I(mod) is changing???
Can anyone know or tell me some article about this,thanks very much!
[/b]