Recent content by kum111

any information on integration of output from phototdiode will be helpful

got it with 1k resistor and 10v of reverse voltlage I got pulse 1μs which was needed . thanks guys

Here the laser has a 100w max power for the laser beam which is 70mm long and 2 mm wide . similar to you i have to measure the power and pulse of the laser to calibrate . so do you have anymore information will be helpful , thanks for reply

hello all , The datasheet of the photodiode says that a rise time and fall time of 100ns with Vr=10v , Rl=1kΩ , 820 nm . it i need fast rise time will this be only achieved in reverse bias ?

i have done this and got the Gaussian shaped pulse to 50μs , which in laser is 1μs with not much of a variation on voltage with a 300Ω. i think there is sum effect on the charge time and discharge time of the diode , but am not sure what am getting here .. thank you

hello berkeman, am using a si pin photodiode will has a pretty fast response , there is a glass (window may be am not sure )which is fixed in front of the laser to make it fall on diode .

hello carlgrace , Then how do i control this time constant , i will use the trans amp later if needed . first i have to find what's the effect of this only resistor in parallel , or resistor and capacitor in parallel to my photodiode . The scope probe capacitance changes with the x10 , x1 is...

but the wave which i measure at the load resistor do not have the same time as the laser pulse .. how could it be adjusted . laser pulse has 1 μs ... but here i just 1ms pulse per cm in oscilloscope with voltage of .5v . i have read about the transimpedance amp which is used for current to...

hello , I am trying to detect a laser pulse with a photodiode , having a power of 100w max of the laser beam with pulse wave of 1microsecond . when i see the output in ocilloscope the wave do not have 1 microsencond this is without any resistor or capacitor. so my question is that what...