Laser diode driver

Thread Starter

minh

Joined Nov 24, 2010
24
Dear All..
I intend to use PWM circuit for driver laser diode from 5mw(2volts) increase to with PWM 10mw(6volts) or more but some people have told me it will reduce the lifespan of device So could you help me to know this advice is true or not
Many thank you.
 

#12

Joined Nov 30, 2010
18,076
Basically true. Run anything at twice the power it is designed for and it will fail soon.
 

ian field

Joined Oct 27, 2012
6,543
Dear All..
I intend to use PWM circuit for driver laser diode from 5mw(2volts) increase to with PWM 10mw(6volts) or more but some people have told me it will reduce the lifespan of device So could you help me to know this advice is true or not
Many thank you.
You probably need to filter the PWM to get steady DC, and sense current through the LD as the main influence for controlling the mark space ratio.
 
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