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Reflected Power Formula

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Reflected Power of the Fiber is a measure of the power of the signal that is reflected back. Check FAQs

P refl = P o \cdot {(\frac{η core - n air}{η core + n air})}^{2}

P_refl - Reflected Power of the Fiber?P_o - Incident Power?η_core - Refractive Index of Core?n_air - Refractive Index of Air?

Reflected Power Example

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Here is how the Reflected Power equation looks like with Values.

Here is how the Reflected Power equation looks like with Units.

Here is how the Reflected Power equation looks like.

0.0359 = 1.75 \cdot {(\frac{1.335 - 1.0003}{1.335 + 1.0003})}^{2}

0.0359µW = 1.75µW \cdot {(\frac{1.335 - 1.0003}{1.335 + 1.0003})}^{2}

0.0359 = 1.75 \cdot {(\frac{1.335 - 1.0003}{1.335 + 1.0003})}^{2}

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Reflected Power Solution

Follow our step by step solution on how to calculate Reflected Power?

FIRST Step Consider the formula

P refl = P o \cdot {(\frac{η core - n air}{η core + n air})}^{2}

Next Step Substitute values of Variables

∴

P refl = 1.75µW \cdot {(\frac{1.335 - 1.0003}{1.335 + 1.0003})}^{2}

Next Step Convert Units

∴

P refl = 1.8E-6W \cdot {(\frac{1.335 - 1.0003}{1.335 + 1.0003})}^{2}

Next Step Prepare to Evaluate

∴

P refl = 1.8E-6 \cdot {(\frac{1.335 - 1.0003}{1.335 + 1.0003})}^{2}

Next Step Evaluate

∴

P refl = 3.59471211015862E-08W

Next Step Convert to Output's Unit

∴

P refl = 0.0359471211015862µW

LAST Step Rounding Answer

∴

P refl = 0.0359µW

Reflected Power Formula Elements

Variables

Reflected Power of the Fiber

Reflected Power of the Fiber is a measure of the power of the signal that is reflected back.

Symbol: P_refl

Measurement: PowerUnit: µW

Note: Value should be greater than 0.

Formulas to find Reflected Power of the Fiber

Incident Power

Incident Power w.r.t optics is the amount of optical power (light energy) incident on the photodetector.

Symbol: P_o

Measurement: PowerUnit: µW

Note: Value should be greater than 0.

Formulas to find Incident Power

Refractive Index of Core

The Refractive Index of Core is defined as how the light travels through that medium. It defines how much a light ray can bend when it enters from one medium to the other.

Symbol: η_core

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Refractive Index of Core

Refractive Index of Air

Refractive Index of Air is the refractive index of a vacuum.

Symbol: n_air

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Refractive Index of Air

Other formulas in Fiber Optic Parameters category

Go Carrier to Noise Ratio

CNR = \frac{P car}{P rin + P shot + P the}

Go Fiber Length Given Time Difference

l = \frac{[c] \cdot t dif}{2 \cdot η core}

Go Total Dispersion

t t = \sqrt{{t cd}^{2} + {t pmd}^{2} + {t mod}^{2}}

Go Refractive Index of Material Given Optical Power

η core = n 0 + n 2 \cdot (\frac{P i}{A eff})

How to Evaluate Reflected Power?

Reflected Power evaluator uses Reflected Power of the Fiber = Incident Power*((Refractive Index of Core-Refractive Index of Air)/(Refractive Index of Core+Refractive Index of Air))^2 to evaluate the Reflected Power of the Fiber, The reflected power of the fiber is a measure of the power of the signal that is reflected back towards the source due to discontinuities or impedance mismatches in the optical fiber. Reflected Power of the Fiber is denoted by P_refl symbol.

How to evaluate Reflected Power using this online evaluator? To use this online evaluator for Reflected Power, enter Incident Power (P_o), Refractive Index of Core (η_core) & Refractive Index of Air (n_air) and hit the calculate button.

FAQs on Reflected Power

What is the formula to find Reflected Power?

The formula of Reflected Power is expressed as Reflected Power of the Fiber = Incident Power*((Refractive Index of Core-Refractive Index of Air)/(Refractive Index of Core+Refractive Index of Air))^2. Here is an example- 35947.12 = 1.75E-06*((1.335-1.0003)/(1.335+1.0003))^2.

How to calculate Reflected Power?

With Incident Power (P_o), Refractive Index of Core (η_core) & Refractive Index of Air (n_air) we can find Reflected Power using the formula - Reflected Power of the Fiber = Incident Power*((Refractive Index of Core-Refractive Index of Air)/(Refractive Index of Core+Refractive Index of Air))^2.

Can the Reflected Power be negative?

No, the Reflected Power, measured in Power cannot be negative.

Which unit is used to measure Reflected Power?

Reflected Power is usually measured using the Microwatt[µW] for Power. Watt[µW], Kilowatt[µW], Milliwatt[µW] are the few other units in which Reflected Power can be measured.

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Reflected Power Formula

Reflected Power Example

Reflected Power Solution

Reflected Power Formula Elements

Other formulas in Fiber Optic Parameters category

How to Evaluate Reflected Power?

FAQs on Reflected Power

Variable Name