Total Photodiode Current Calculator

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✖Dark current is the electric current that flows through a photosensitive device, such as a photodetector, even when there is no incident light or photons striking the device.ⓘ Dark Current [I_d]			+10% -10%
✖Photodiode Voltage is the voltage across the diode junction.ⓘ Photodiode Voltage [V_ph]			+10% -10%
✖Temperature is the degree or intensity of heat present in a substance or object.ⓘ Temperature [T]			+10% -10%
✖Photocurrent is the electrical current produced by the photodetector when exposed to light.ⓘ Photocurrent [I_p]			+10% -10%

✖Output Current is the total output current at the operating voltage.ⓘ Total Photodiode Current [I_o]

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Formula

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Total Photodiode Current

Formula

`"I"_{"o"} = "I"_{"d"}*(exp(("[Charge-e]"*"V"_{"ph"})/(2*"[BoltZ]"*"T"))-1)+"I"_{"p"}`

Example

`"9.942188A"="11nA"*(exp(("[Charge-e]"*"302mV")/(2*"[BoltZ]"*"85K"))-1)+"70mA"`

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Total Photodiode Current Solution

STEP 0: Pre-Calculation Summary

Formula Used

Output Current = Dark Current*(exp(([Charge-e]*Photodiode Voltage)/(2*[BoltZ]*Temperature))-1)+Photocurrent
I_o = I_d*(exp(([Charge-e]*V_ph)/(2*[BoltZ]*T))-1)+I_p
This formula uses 2 Constants, 1 Functions, 5 Variables

Constants Used

[Charge-e] - Charge of electron Value Taken As 1.60217662E-19
[BoltZ] - Boltzmann constant Value Taken As 1.38064852E-23

Functions Used

exp - n an exponential function, the value of the function changes by a constant factor for every unit change in the independent variable., exp(Number)

Variables Used

Output Current - (Measured in Ampere) - Output Current is the total output current at the operating voltage.
Dark Current - (Measured in Ampere) - Dark current is the electric current that flows through a photosensitive device, such as a photodetector, even when there is no incident light or photons striking the device.
Photodiode Voltage - (Measured in Volt) - Photodiode Voltage is the voltage across the diode junction.
Temperature - (Measured in Kelvin) - Temperature is the degree or intensity of heat present in a substance or object.
Photocurrent - (Measured in Ampere) - Photocurrent is the electrical current produced by the photodetector when exposed to light.

STEP 1: Convert Input(s) to Base Unit

Dark Current: 11 Nanoampere --> 1.1E-08 Ampere (Check conversion here)
Photodiode Voltage: 302 Millivolt --> 0.302 Volt (Check conversion here)
Temperature: 85 Kelvin --> 85 Kelvin No Conversion Required
Photocurrent: 70 Milliampere --> 0.07 Ampere (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

I_o = I_d*(exp(([Charge-e]*V_ph)/(2*[BoltZ]*T))-1)+I_p --> 1.1E-08*(exp(([Charge-e]*0.302)/(2*[BoltZ]*85))-1)+0.07

Evaluating ... ...

I_o = 9.94218843963191

STEP 3: Convert Result to Output's Unit

9.94218843963191 Ampere --> No Conversion Required

FINAL ANSWER

9.94218843963191 ≈ 9.942188 Ampere <-- Output Current

(Calculation completed in 00.004 seconds)

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Home » Engineering » Electronics » Fiber Optic Transmission » Optical Detectors » Total Photodiode Current

Credits

Created by Vaidehi Singh

Prabhat Engineering College (P.E.C.), Uttar Pradesh

Vaidehi Singh has created this Calculator and 25+ more calculators!

Verified by Parminder Singh

Chandigarh University (CU), Punjab

Parminder Singh has verified this Calculator and 600+ more calculators!

< 25 Optical Detectors Calculators

SNR of Good Avalanche Photodiode ADP Receiver in decibels

Go Signal to Noise Ratio = 10*log10((Multiplication Factor^2*Photocurrent^2)/(2*[Charge-e]*Post Detection Bandwidth*(Photocurrent+Dark Current)*Multiplication Factor^2.3+((4*[BoltZ]*Temperature*Post Detection Bandwidth*1.26)/Load Resistance)))

Photocurrent due to Incident Light

Go Photocurrent = (Incident Power*[Charge-e]*(1-Reflection Coefficient))/([hP]*Frequency Of Incident Light)*(1-exp(-Absorption Coefficient*Width of Absorption Region))

Probability of Detecting Photons

Go Probability of Finding a Photon = ((Variance of Probability Distribution Function^(Number of Incident Photons))*exp(-Variance of Probability Distribution Function))/(Number of Incident Photons!)

Excess Avalanche Noise Factor

Go Excess Avalanche Noise Factor = Multiplication Factor*(1+((1-Impact Ionization Coefficient)/Impact Ionization Coefficient)*((Multiplication Factor-1)/Multiplication Factor)^2)

Total Photodiode Current

Go Output Current = Dark Current*(exp(([Charge-e]*Photodiode Voltage)/(2*[BoltZ]*Temperature))-1)+Photocurrent

Optical Gain of Phototransistors

Go Optical Gain of Phototransistor = (([hP]*[c])/(Wavelength of Light*[Charge-e]))*(Collector Current of Phototransistor/Incident Power)

Average Number of Photons Detected

Go Average Number Of Photons Detected = (Quantum Efficiency*Average Received Optical Power*Time Period)/(Frequency Of Incident Light*[hP])

Single Pass Phase Shift through Fabry-Perot Amplifier

Go Single-Pass Phase Shift = (pi*(Frequency Of Incident Light-Fabry–Perot Resonant Frequency))/Free Spectral Range of Fabry-Pérot Interferometer

Total Root Mean Square Noise Current

Go Total Root Mean Square Noise Current = sqrt(Total Shot Noise^2+Dark Current Noise^2+Thermal Noise Current^2)

Average Received Optical Power

Go Average Received Optical Power = (20.7*[hP]*Frequency Of Incident Light)/(Time Period*Quantum Efficiency)

Total Power Accepted by Fiber

Go Total Power Accepted by Fiber = Incident Power*(1-(8*Axial Displacement)/(3*pi*Radius of Core))

Multiplied Photocurrent

Go Multiplied Photocurrent = Optical Gain of Phototransistor*Responsivity of Photodetector*Incident Power

Temperature Effect on Dark Current

Go Dark Current in raised temperature = Dark Current*2^((Changed Temperature-Previous Temperature)/10)

Incident Photon Rate

Go Incident Photon Rate = Incident Optical Power/([hP]*Frequency Of Light Wave)

Maximum Photodiode 3 dB Bandwidth

Go Maximum 3db Bandwidth = Carrier Velocity/(2*pi*Depletion Layer Width)

Maximum 3dB Bandwidth of Metal Photodetector

Go Maximum 3db Bandwidth = 1/(2*pi*Transit Time*PhotoConductive Gain)

Bandwidth Penalty

Go Post Detection Bandwidth = 1/(2*pi*Load Resistance*Capacitance)

Long Wavelength Cutoff Point

Go Wavelength Cutoff Point = [hP]*[c]/Bandgap Energy

Quantum Efficiency of Photodetector

Go Quantum Efficiency = Number of Electrons/Number of Incident Photons

Multiplication Factor

Go Multiplication Factor = Output Current/Initial Photocurrent

Electron Rate in Detector

Go Electron Rate = Quantum Efficiency*Incident Photon Rate

Transit Time with respect to Minority Carrier Diffusion

Go Diffusion Time = Distance^2/(2*Diffusion Coefficient)

Longest Transit Time

Go Transit Time = Depletion Layer Width/Drift Velocity

3 dB Bandwidth of Metal Photodetectors

Go Maximum 3db Bandwidth = 1/(2*pi*Transit Time)

Detectivity of Photodetector

Go Detectivity = 1/Noise Equivalent Power

Total Photodiode Current Formula

Output Current = Dark Current*(exp(([Charge-e]*Photodiode Voltage)/(2*[BoltZ]*Temperature))-1)+Photocurrent
I_o = I_d*(exp(([Charge-e]*V_ph)/(2*[BoltZ]*T))-1)+I_p

What is the significance of Total Photodiode Current?

The total photodiode current is significant because it is the sum of the dark current and the photocurrent. This total current is crucial for the operation and sensitivity of the photodiode. The photocurrent is linearly proportional to the irradiance, which is the power per unit area received from the light source. Therefore, the total current can provide information about the intensity of the incident light.

How to Calculate Total Photodiode Current?

Total Photodiode Current calculator uses Output Current = Dark Current*(exp(([Charge-e]*Photodiode Voltage)/(2*[BoltZ]*Temperature))-1)+Photocurrent to calculate the Output Current, Total Photodiode Current is the sum of the dark current and the photocurrent. The dark current is the current that is passed in the absence of light. The photocurrent is produced when a photon of sufficient energy strikes the diode, creating an electron-hole pair. Output Current is denoted by I_o symbol.

How to calculate Total Photodiode Current using this online calculator? To use this online calculator for Total Photodiode Current, enter Dark Current (I_d), Photodiode Voltage (V_ph), Temperature (T) & Photocurrent (I_p) and hit the calculate button. Here is how the Total Photodiode Current calculation can be explained with given input values -> 9.942188 = 1.1E-08*(exp(([Charge-e]*0.302)/(2*[BoltZ]*85))-1)+0.07.

FAQ

What is Total Photodiode Current?

Total Photodiode Current is the sum of the dark current and the photocurrent. The dark current is the current that is passed in the absence of light. The photocurrent is produced when a photon of sufficient energy strikes the diode, creating an electron-hole pair and is represented as I_o = I_d*(exp(([Charge-e]*V_ph)/(2*[BoltZ]*T))-1)+I_p or Output Current = Dark Current*(exp(([Charge-e]*Photodiode Voltage)/(2*[BoltZ]*Temperature))-1)+Photocurrent. Dark current is the electric current that flows through a photosensitive device, such as a photodetector, even when there is no incident light or photons striking the device, Photodiode Voltage is the voltage across the diode junction, Temperature is the degree or intensity of heat present in a substance or object & Photocurrent is the electrical current produced by the photodetector when exposed to light.

How to calculate Total Photodiode Current?

Total Photodiode Current is the sum of the dark current and the photocurrent. The dark current is the current that is passed in the absence of light. The photocurrent is produced when a photon of sufficient energy strikes the diode, creating an electron-hole pair is calculated using Output Current = Dark Current*(exp(([Charge-e]*Photodiode Voltage)/(2*[BoltZ]*Temperature))-1)+Photocurrent. To calculate Total Photodiode Current, you need Dark Current (I_d), Photodiode Voltage (V_ph), Temperature (T) & Photocurrent (I_p). With our tool, you need to enter the respective value for Dark Current, Photodiode Voltage, Temperature & Photocurrent and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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