Quantum Efficiency of Photodetector Calculator

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Optical Detectors

C-V Actions of Optics Transmission

Fiber Optic Parameters

Transmission Measurements

✖Number of Electrons is the amount of electrons collected during the process.ⓘ Number of Electrons [N_e]			+10% -10%
✖Number of Incident Photons refers to the quantity of individual photons (particles of light) that strike or interact with a surface, detector, or material within a given period or area.ⓘ Number of Incident Photons [N_p]			+10% -10%

✖Quantum Efficiency represents the probability that a photon incident on the photodetector will generate an electron-hole pair, leading to a photocurrent.ⓘ Quantum Efficiency of Photodetector [η]

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Formula

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Quantum Efficiency of Photodetector

Formula

`"η" = "N"_{"e"}/"N"_{"p"}`

Example

`"0.3008"="1.88"/"6.25"`

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Quantum Efficiency of Photodetector Solution

STEP 0: Pre-Calculation Summary

Formula Used

Quantum Efficiency = Number of Electrons/Number of Incident Photons
η = N_e/N_p
This formula uses 3 Variables

Variables Used

Quantum Efficiency - Quantum Efficiency represents the probability that a photon incident on the photodetector will generate an electron-hole pair, leading to a photocurrent.
Number of Electrons - Number of Electrons is the amount of electrons collected during the process.
Number of Incident Photons - Number of Incident Photons refers to the quantity of individual photons (particles of light) that strike or interact with a surface, detector, or material within a given period or area.

STEP 1: Convert Input(s) to Base Unit

Number of Electrons: 1.88 --> No Conversion Required
Number of Incident Photons: 6.25 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

η = N_e/N_p --> 1.88/6.25

Evaluating ... ...

η = 0.3008

STEP 3: Convert Result to Output's Unit

0.3008 --> No Conversion Required

FINAL ANSWER

0.3008 <-- Quantum Efficiency

(Calculation completed in 00.004 seconds)

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Created by Simran Shravan Nishad

Sinhgad College Of Engineering (SCOE), Pune

Simran Shravan Nishad has created this Calculator and 25+ more calculators!

Verified by Ritwik Tripathi

Vellore Institute of Technology (VIT Vellore), Vellore

Ritwik Tripathi has verified this Calculator and 100+ 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

Quantum Efficiency of Photodetector Formula

Quantum Efficiency = Number of Electrons/Number of Incident Photons
η = N_e/N_p

What is quantum efficiency in general terms ?

Quantum efficiency is the measure of the effectiveness of an imaging device to convert incident photons into electrons.

What are another terms used for quantum efficiency and what are its types ?

Another terms used for quantum efficiency are spectral response and IPCE during its applications.
There are two types external and internal quantum efficiencies .

How to Calculate Quantum Efficiency of Photodetector?

Quantum Efficiency of Photodetector calculator uses Quantum Efficiency = Number of Electrons/Number of Incident Photons to calculate the Quantum Efficiency, The Quantum Efficiency of Photodetector is the fraction of incident (or alternatively, of absorbed) photons which contribute to the external photocurrent. Quantum Efficiency is denoted by η symbol.

How to calculate Quantum Efficiency of Photodetector using this online calculator? To use this online calculator for Quantum Efficiency of Photodetector, enter Number of Electrons (N_e) & Number of Incident Photons (N_p) and hit the calculate button. Here is how the Quantum Efficiency of Photodetector calculation can be explained with given input values -> 0.3008 = 1.88/6.25.

FAQ

What is Quantum Efficiency of Photodetector?

The Quantum Efficiency of Photodetector is the fraction of incident (or alternatively, of absorbed) photons which contribute to the external photocurrent and is represented as η = N_e/N_p or Quantum Efficiency = Number of Electrons/Number of Incident Photons. Number of Electrons is the amount of electrons collected during the process & Number of Incident Photons refers to the quantity of individual photons (particles of light) that strike or interact with a surface, detector, or material within a given period or area.

How to calculate Quantum Efficiency of Photodetector?

The Quantum Efficiency of Photodetector is the fraction of incident (or alternatively, of absorbed) photons which contribute to the external photocurrent is calculated using Quantum Efficiency = Number of Electrons/Number of Incident Photons. To calculate Quantum Efficiency of Photodetector, you need Number of Electrons (N_e) & Number of Incident Photons (N_p). With our tool, you need to enter the respective value for Number of Electrons & Number of Incident Photons 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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