Multiplied Photocurrent Calculator

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Optical Detectors

C-V Actions of Optics Transmission

Fiber Optic Parameters

Transmission Measurements

✖Optical Gain of Phototransistor is a measure of how well a medium amplifies photons by stimulated emission.ⓘ Optical Gain of Phototransistor [G_O]			+10% -10%
✖Responsivity of Photodetector quantifies how much electrical current a photodetector generates in response to a certain amount of incident optical power.ⓘ Responsivity of Photodetector [R]			+10% -10%
✖Incident Power w.r.t optics is the amount of optical power (light energy) incident on the photodetector.ⓘ Incident Power [P_o]			+10% -10%

✖Multiplied Photocurrent is caused when the receiver sensitivity increases because the photocurrent is multiplied before encountering the electrical noise associated with the receiver circuitry.ⓘ Multiplied Photocurrent [I_M]

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Formula

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Multiplied Photocurrent

Formula

`"I"_{"M"} = "G"_{"O"}*"R"*"P"_{"o"}`

Example

`"10.5µA"="0.15"*"40A"*"1.75µW"`

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Multiplied Photocurrent Solution

STEP 0: Pre-Calculation Summary

Formula Used

Multiplied Photocurrent = Optical Gain of Phototransistor*Responsivity of Photodetector*Incident Power
I_M = G_O*R*P_o
This formula uses 4 Variables

Variables Used

Multiplied Photocurrent - (Measured in Ampere) - Multiplied Photocurrent is caused when the receiver sensitivity increases because the photocurrent is multiplied before encountering the electrical noise associated with the receiver circuitry.
Optical Gain of Phototransistor - Optical Gain of Phototransistor is a measure of how well a medium amplifies photons by stimulated emission.
Responsivity of Photodetector - (Measured in Ampere) - Responsivity of Photodetector quantifies how much electrical current a photodetector generates in response to a certain amount of incident optical power.
Incident Power - (Measured in Watt) - Incident Power w.r.t optics is the amount of optical power (light energy) incident on the photodetector.

STEP 1: Convert Input(s) to Base Unit

Optical Gain of Phototransistor: 0.15 --> No Conversion Required
Responsivity of Photodetector: 40 Ampere --> 40 Ampere No Conversion Required
Incident Power: 1.75 Microwatt --> 1.75E-06 Watt (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

I_M = G_O*R*P_o --> 0.15*40*1.75E-06

Evaluating ... ...

I_M = 1.05E-05

STEP 3: Convert Result to Output's Unit

1.05E-05 Ampere -->10.5 Microampere (Check conversion here)

FINAL ANSWER

10.5 Microampere <-- Multiplied Photocurrent

(Calculation completed in 00.004 seconds)

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Created by Vaidehi Singh

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

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Chandigarh University (CU), Punjab

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< 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

Multiplied Photocurrent Formula

Multiplied Photocurrent = Optical Gain of Phototransistor*Responsivity of Photodetector*Incident Power
I_M = G_O*R*P_o

What is the significance of Multiplied Photocurrent?

The significance of multiplied photocurrent lies in its ability to substantially enhance the responsivity of photodetectors. This means that a small amount of incident light can generate a large electrical signal, improving the sensitivity of the device.

How to Calculate Multiplied Photocurrent?

Multiplied Photocurrent calculator uses Multiplied Photocurrent = Optical Gain of Phototransistor*Responsivity of Photodetector*Incident Power to calculate the Multiplied Photocurrent, Multiplied Photocurrent is caused when the receiver sensitivity increases because the photocurrent is multiplied before encountering the electrical noise associated with the receiver circuitry. The process is called avalanche multiplication and hence the device is called Avalanche Photodiode. Multiplied Photocurrent is denoted by I_M symbol.

How to calculate Multiplied Photocurrent using this online calculator? To use this online calculator for Multiplied Photocurrent, enter Optical Gain of Phototransistor (G_O), Responsivity of Photodetector (R) & Incident Power (P_o) and hit the calculate button. Here is how the Multiplied Photocurrent calculation can be explained with given input values -> 1.1E+7 = 0.15*40*1.75E-06.

FAQ

What is Multiplied Photocurrent?

Multiplied Photocurrent is caused when the receiver sensitivity increases because the photocurrent is multiplied before encountering the electrical noise associated with the receiver circuitry. The process is called avalanche multiplication and hence the device is called Avalanche Photodiode and is represented as I_M = G_O*R*P_o or Multiplied Photocurrent = Optical Gain of Phototransistor*Responsivity of Photodetector*Incident Power. Optical Gain of Phototransistor is a measure of how well a medium amplifies photons by stimulated emission, Responsivity of Photodetector quantifies how much electrical current a photodetector generates in response to a certain amount of incident optical power & Incident Power w.r.t optics is the amount of optical power (light energy) incident on the photodetector.

How to calculate Multiplied Photocurrent?

Multiplied Photocurrent is caused when the receiver sensitivity increases because the photocurrent is multiplied before encountering the electrical noise associated with the receiver circuitry. The process is called avalanche multiplication and hence the device is called Avalanche Photodiode is calculated using Multiplied Photocurrent = Optical Gain of Phototransistor*Responsivity of Photodetector*Incident Power. To calculate Multiplied Photocurrent, you need Optical Gain of Phototransistor (G_O), Responsivity of Photodetector (R) & Incident Power (P_o). With our tool, you need to enter the respective value for Optical Gain of Phototransistor, Responsivity of Photodetector & Incident Power 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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