Product FAQs

What factors determine photodiode response speed?

Photodiode response speed is determined by factors such as the CR time constant, carrier diffusion time, and carrier transit time in the depletion layer. Compared to short-wavelength light, long-wavelength light makes the carrier diffusion time longer, so the photodiode response is slower. The following methods improve the response speed. 

  1. Select photodiodes with lower terminal capacitance.

  2. Reduce load resistance.

  3. Lower terminal capacitance by applying reverse voltage. (Note that dark current increases with increasing reverse voltage.)

What factors determine photodiode response speed?

Photodiode response speed is determined by factors such as the CR time constant, carrier diffusion time, and carrier transit time in the depletion layer. Compared to short-wavelength light, long-wavelength light makes the carrier diffusion time longer, so the photodiode response is slower. The following methods improve the response speed. 

  1. Select photodiodes with lower terminal capacitance.

  2. Reduce load resistance.

  3. Lower terminal capacitance by applying reverse voltage. (Note that dark current increases with increasing reverse voltage.)

What factors determine photodiode response speed?

Photodiode response speed is determined by factors such as the CR time constant, carrier diffusion time, and carrier transit time in the depletion layer. Compared to short-wavelength light, long-wavelength light makes the carrier diffusion time longer, so the photodiode response is slower. The following methods improve the response speed. 

  1. Select photodiodes with lower terminal capacitance.

  2. Reduce load resistance.

  3. Lower terminal capacitance by applying reverse voltage. (Note that dark current increases with increasing reverse voltage.)

What factors determine photodiode response speed?

Photodiode response speed is determined by factors such as the CR time constant, carrier diffusion time, and carrier transit time in the depletion layer. Compared to short-wavelength light, long-wavelength light makes the carrier diffusion time longer, so the photodiode response is slower. The following methods improve the response speed. 

  1. Select photodiodes with lower terminal capacitance.

  2. Reduce load resistance.

  3. Lower terminal capacitance by applying reverse voltage. (Note that dark current increases with increasing reverse voltage.)