Answer:
A photodiode is a semiconductor-based light detector that measures the intensity of light. It is commonly used for a variety of applications, such as detecting the intensity of incident light, sensing environmental light levels, and measuring spectroscopy in research. The sensitivity of a photodiode is usually expressed in units of uA/mW/cm2, which is the current produced by the diode for a given incident light power per unit area. This article will discuss how to determine the photodiode sensitivity in uA/mW/cm2 assuming the unattenuated laser beam to have an incident power of 2.75mW and a beam diameter of 1mm.
Step-by-step explanation:
Process of Photodiode Sensitivity Determination
To determine the sensitivity of a photodiode, the incident light power (P) and the beam diameter (D) must be known. In the case of the unattenuated laser beam, these can be directly measured. The sensitivity can then be calculated as follows:
Sensitivity (uA/mW/cm2) = P/(πD2)
Where P is the incident light power in mW and D is the beam diameter in mm.
For the example given, the sensitivity can be calculated as follows:
Sensitivity (uA/mW/cm2) = 2.75/(πx1x1)
Sensitivity (uA/mW/cm2) = 2.75/(π)
Sensitivity (uA/mW/cm2) = 0.87 uA/mW/cm2
I hope I helped, have a good day!