Dark Current Noise Calculator

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C-V Actions of Optics Transmission

Fiber Optic Parameters

Optical Detectors

Transmission Measurements

✖Post Detection Bandwidth refers to the bandwidth of the electrical signal after it has been detected and converted from an optical signal.ⓘ Post Detection Bandwidth [B]			+10% -10%
✖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%

✖Dark Current Noise is the electrical noise or current that is generated by photosensitive devices, when they are exposed to no external light or when they operate in the absence of incident photons.ⓘ Dark Current Noise [i_d]

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Formula

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Dark Current Noise

Formula

`"i"_{"d"} = 2*"B"*"[Charge-e]"*"I"_{"d"}`

Example

`"2.8E^-20A"=2*"8e6Hz"*"[Charge-e]"*"11nA"`

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Dark Current Noise Solution

STEP 0: Pre-Calculation Summary

Formula Used

Dark Current Noise = 2*Post Detection Bandwidth*[Charge-e]*Dark Current
i_d = 2*B*[Charge-e]*I_d
This formula uses 1 Constants, 3 Variables

Constants Used

[Charge-e] - Charge of electron Value Taken As 1.60217662E-19

Variables Used

Dark Current Noise - (Measured in Ampere) - Dark Current Noise is the electrical noise or current that is generated by photosensitive devices, when they are exposed to no external light or when they operate in the absence of incident photons.
Post Detection Bandwidth - (Measured in Hertz) - Post Detection Bandwidth refers to the bandwidth of the electrical signal after it has been detected and converted from an optical signal.
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.

STEP 1: Convert Input(s) to Base Unit

Post Detection Bandwidth: 8000000 Hertz --> 8000000 Hertz No Conversion Required
Dark Current: 11 Nanoampere --> 1.1E-08 Ampere (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

i_d = 2*B*[Charge-e]*I_d --> 2*8000000*[Charge-e]*1.1E-08

Evaluating ... ...

i_d = 2.8198308512E-20

STEP 3: Convert Result to Output's Unit

2.8198308512E-20 Ampere --> No Conversion Required

FINAL ANSWER

2.8198308512E-20 ≈ 2.8E-20 Ampere <-- Dark Current Noise

(Calculation completed in 00.020 seconds)

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Credits

Created by Santhosh Yadav

Dayananda Sagar College Of Engineering (DSCE), Banglore

Santhosh Yadav has created this Calculator and 50+ more calculators!

Verified by Ritwik Tripathi

Vellore Institute of Technology (VIT Vellore), Vellore

Ritwik Tripathi has verified this Calculator and 100+ more calculators!

< 17 C-V Actions of Optics Transmission Calculators

Noise Equivalent Power

Go Noise Equivalent Power = [hP]*[c]*sqrt(2*Charge Of Particles*Dark Current)/(Quantum Efficiency*Charge Of Particles*Wavelength of Light)

Passband Ripple

Go Passband Ripple = ((1+sqrt(Resistance 1*Resistance 2)*Single Pass Gain)/(1-sqrt(Resistance 1*Resistance 2)*Single Pass Gain))^2

ASE Noise Power

Go ASE Noise Power = Mode Number*Spontaneous Emission Factor*(Single Pass Gain-1)*([hP]*Frequency Of Incident Light)*Post Detection Bandwidth

Noise Figure given ASE Noise Power

Go Noise Figure = 10*log10(ASE Noise Power/(Single Pass Gain*[hP]*Frequency Of Incident Light*Post Detection Bandwidth))

Output Photo Current

Go Photocurrent = Quantum Efficiency*Incident Optical Power*[Charge-e]/([hP]*Frequency Of Incident Light)

Peak Parametric Gain

Go Peak Parametric Gain = 10*log10(0.25*exp(2*Fiber Non Linear Coefficient*Pump Signal Power*Fiber Length))

Responsivity with reference of Wavelength

Go Responsivity of Photodetector = (Quantum Efficiency*[Charge-e]*Wavelength of Light)/([hP]*[c])

Total Shot Noise

Go Total Shot Noise = sqrt(2*[Charge-e]*Post Detection Bandwidth*(Photocurrent+Dark Current))

Responsivity in relation to Photon Energy

Go Responsivity of Photodetector = (Quantum Efficiency*[Charge-e])/([hP]*Frequency Of Incident Light)

Thermal Noise Current

Go Thermal Noise Current = 4*[BoltZ]*Absolute Temperature*Post Detection Bandwidth/Resistivity

Gain Coefficient

Go Net Gain Coefficient Per Unit Length = Optical Confinement Factor*Material Gain Coefficient-Effective Loss Coefficient

Junction Capacitance of Photodiode

Go Junction Capacitance = Permittivity of Semiconductor*Junction Area/Depletion Layer Width

Dark Current Noise

Go Dark Current Noise = 2*Post Detection Bandwidth*[Charge-e]*Dark Current

Load Resistor

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

Optical Gain of Phototransistor

Go Optical Gain of Phototransistor = Quantum Efficiency*Common Emitter Current Gain

PhotoConductive Gain

Go PhotoConductive Gain = Slow Carrier Transit Time/Fast Carrier Transit Time

Responsivity of Photodetector

Go Responsivity of Photodetector = Photocurrent/Incident Power

Dark Current Noise Formula

Dark Current Noise = 2*Post Detection Bandwidth*[Charge-e]*Dark Current
i_d = 2*B*[Charge-e]*I_d

Why is Dark Current Noise important?

Dark current noise is crucial in optical and imaging systems because it can degrade image quality, reduce the signal-to-noise ratio, and limit the effectiveness of capturing faint or distant objects.

How to Calculate Dark Current Noise?

Dark Current Noise calculator uses Dark Current Noise = 2*Post Detection Bandwidth*[Charge-e]*Dark Current to calculate the Dark Current Noise, Dark current noise in optics refers to the electrical noise or current that is generated by photosensitive devices, such as photodiodes or charge-coupled devices (CCD), when they are exposed to no external light or when they operate in the absence of incident photons. Dark Current Noise is denoted by i_d symbol.

How to calculate Dark Current Noise using this online calculator? To use this online calculator for Dark Current Noise, enter Post Detection Bandwidth (B) & Dark Current (I_d) and hit the calculate button. Here is how the Dark Current Noise calculation can be explained with given input values -> 7.4E-26 = 2*8000000*[Charge-e]*1.1E-08.

FAQ

What is Dark Current Noise?

Dark current noise in optics refers to the electrical noise or current that is generated by photosensitive devices, such as photodiodes or charge-coupled devices (CCD), when they are exposed to no external light or when they operate in the absence of incident photons and is represented as i_d = 2*B*[Charge-e]*I_d or Dark Current Noise = 2*Post Detection Bandwidth*[Charge-e]*Dark Current. Post Detection Bandwidth refers to the bandwidth of the electrical signal after it has been detected and converted from an optical signal & 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.

How to calculate Dark Current Noise?

Dark current noise in optics refers to the electrical noise or current that is generated by photosensitive devices, such as photodiodes or charge-coupled devices (CCD), when they are exposed to no external light or when they operate in the absence of incident photons is calculated using Dark Current Noise = 2*Post Detection Bandwidth*[Charge-e]*Dark Current. To calculate Dark Current Noise, you need Post Detection Bandwidth (B) & Dark Current (I_d). With our tool, you need to enter the respective value for Post Detection Bandwidth & Dark Current 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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