Pulse Spreading Time Calculator

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Transmission Measurements

C-V Actions of Optics Transmission

Fiber Optic Parameters

Optical Detectors

✖Polarisation Mode Dispersion Coefficient specifies the type of fiber used.ⓘ Polarisation Mode Dispersion Coefficient [D_pmd]			+10% -10%
✖Length Of Cable is the usually the measurement used to measure how long the cable is.ⓘ Length Of Cable [L₁]			+10% -10%

✖Pulse Spreading Time is the time which results as the polarisation mode dispersion takes place.ⓘ Pulse Spreading Time [t_pmd]

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Formula

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Pulse Spreading Time

Formula

`"t"_{"pmd"} = "D"_{"pmd"}*sqrt("L"_{"1"})`

Example

`"32.60813s"="23"*sqrt("2.01m")`

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Pulse Spreading Time Solution

STEP 0: Pre-Calculation Summary

Formula Used

Pulse Spreading Time = Polarisation Mode Dispersion Coefficient*sqrt(Length Of Cable)
t_pmd = D_pmd*sqrt(L₁)
This formula uses 1 Functions, 3 Variables

Functions Used

sqrt - A square root function is a function that takes a non-negative number as an input and returns the square root of the given input number., sqrt(Number)

Variables Used

Pulse Spreading Time - (Measured in Second) - Pulse Spreading Time is the time which results as the polarisation mode dispersion takes place.
Polarisation Mode Dispersion Coefficient - Polarisation Mode Dispersion Coefficient specifies the type of fiber used.
Length Of Cable - (Measured in Meter) - Length Of Cable is the usually the measurement used to measure how long the cable is.

STEP 1: Convert Input(s) to Base Unit

Polarisation Mode Dispersion Coefficient: 23 --> No Conversion Required
Length Of Cable: 2.01 Meter --> 2.01 Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

t_pmd = D_pmd*sqrt(L₁) --> 23*sqrt(2.01)

Evaluating ... ...

t_pmd = 32.608127821143

STEP 3: Convert Result to Output's Unit

32.608127821143 Second --> No Conversion Required

FINAL ANSWER

32.608127821143 ≈ 32.60813 Second <-- Pulse Spreading Time

(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!

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Go Time Constant = (Time Instance 2-Time Instance 1)/(ln(Maximum Temperature Rise-Temperature At Time t1)-ln(Maximum Temperature Rise-Temperature At Time t2))

Optical Attenuation

Go Attenuation Per Unit Length = 10/(Length Of Cable-Cut Length)*log10(Photoreceiver Voltage At Cut Length/Photoreceiver Voltage At Full Length)

Optical Return Loss

Go Optical Return Loss = 10*log10((Output Power*Reflected Power)/(Source Power*(Power at Port 2-Power at Port 4)))

Guided Modes Number

Go Guided Modes Number = ((pi*Radius of Core)/Wavelength of Light)^2*(Refractive Index of Core^2-Refractive Index of Cladding^2)

Bit Error Rate given SNR

Go Bit Error Rate = (1/sqrt(2*pi))*(exp(-Signal to Noise Ratio of Photodetector^2/2))/Signal to Noise Ratio of Photodetector

Fiber Rise Time

Go Fiber Rise Time = modulus(Chromatic Dispersion Coefficient)*Length Of Cable*Half Power Spectral Width

Ideal Etalon Transmission

Go Transmission of Etalon = (1+(4*Reflectivity)/(1-Reflectivity)^2*sin(Single-Pass Phase Shift/2)^2)^-1

3dB Pulse Broadening

Go 3dB Pulse Broadening = sqrt(Optical Output Pulse^2-Optical Input Pulse^2)/(Length Of Cable)

Absorption Loss

Go Absorption Loss = (Thermal Capacity*Maximum Temperature Rise)/(Optical Power*Time Constant)

Free Spectral Range of Etalon

Go Free Spectral Range Wavelength = Wavelength of Light^2/(2*Refractive Index of Core*Slab Thickness)

Scattering Loss

Go Scattering Loss = ((4.343*10^5)/Fiber Length)*(Constant Output Optical Power/Output Optical Power)

Refractive Index Difference

Go Difference Refractive Index = (Fringe Displacements Number*Wavelength of Light)/Slab Thickness

Pulse Spreading Time

Go Pulse Spreading Time = Polarisation Mode Dispersion Coefficient*sqrt(Length Of Cable)

Finesse of Etalon

Go Finesse = (pi*sqrt(Reflectivity))/(1-Reflectivity)

Power Penalty

Go Power Penalty = -10*log10((Extinction Ratio-1)/(Extinction Ratio+1))

Relative Attenuation

Go Relative Attenuation = 10*log10(Total Power/Spectral Power)

Bend Attenuation

Go Bend Attenuation = 10*log10(Total Power/Small Power)

Modal Rise Time

Go Modal Rise Time = (440*Length Of Cable)/Modal Dispersion Bandwidth

Optical Modulation Index

Go Modulation Index = Incident Power/Optical Power at Bias Current

Receiver Front End Rise Time

Go Received Rise Time = 350/Receiver Bandwidth

Pulse Spreading Time Formula

Pulse Spreading Time = Polarisation Mode Dispersion Coefficient*sqrt(Length Of Cable)
t_pmd = D_pmd*sqrt(L₁)

How is Pulse Spreading Time useful?

It is an important parameter to consider in high-speed optical communication systems to ensure that the transmitted signals arrive at the receiver without significant distortion. Polarisation Mode Dispersion can degrade signal quality, and understanding it helps in designing systems that can mitigate its effects.

How to Calculate Pulse Spreading Time?

Pulse Spreading Time calculator uses Pulse Spreading Time = Polarisation Mode Dispersion Coefficient*sqrt(Length Of Cable) to calculate the Pulse Spreading Time, Pulse Spreading Time represents the time it takes for the pulse to spread or broaden due to Polarisation Mode Dispersion (PMD) effects over a given length of optical fiber. Pulse Spreading Time is denoted by t_pmd symbol.

How to calculate Pulse Spreading Time using this online calculator? To use this online calculator for Pulse Spreading Time, enter Polarisation Mode Dispersion Coefficient (D_pmd) & Length Of Cable (L₁) and hit the calculate button. Here is how the Pulse Spreading Time calculation can be explained with given input values -> 32.60813 = 23*sqrt(2.01).

FAQ

What is Pulse Spreading Time?

Pulse Spreading Time represents the time it takes for the pulse to spread or broaden due to Polarisation Mode Dispersion (PMD) effects over a given length of optical fiber and is represented as t_pmd = D_pmd*sqrt(L₁) or Pulse Spreading Time = Polarisation Mode Dispersion Coefficient*sqrt(Length Of Cable). Polarisation Mode Dispersion Coefficient specifies the type of fiber used & Length Of Cable is the usually the measurement used to measure how long the cable is.

How to calculate Pulse Spreading Time?

Pulse Spreading Time represents the time it takes for the pulse to spread or broaden due to Polarisation Mode Dispersion (PMD) effects over a given length of optical fiber is calculated using Pulse Spreading Time = Polarisation Mode Dispersion Coefficient*sqrt(Length Of Cable). To calculate Pulse Spreading Time, you need Polarisation Mode Dispersion Coefficient (D_pmd) & Length Of Cable (L₁). With our tool, you need to enter the respective value for Polarisation Mode Dispersion Coefficient & Length Of Cable 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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