FormulaDen.com

Physics Chemistry Math Chemical Engineering Civil Electrical Electronics Electronics and Instrumentation Materials Science Mechanical Production Engineering Financial Health

Optical Modulation Index Formula

Fx Copy

LaTeX Copy

Modulation Index is defined as the amount by which the instantaneous power of the optical carrier varies around its average power. Check FAQs

m opt = \frac{P o}{P bi}

m_opt - Modulation Index?P_o - Incident Power?P_bi - Optical Power at Bias Current?

Optical Modulation Index Example

With values

With units

Only example

Here is how the Optical Modulation Index equation looks like with Values.

Here is how the Optical Modulation Index equation looks like with Units.

Here is how the Optical Modulation Index equation looks like.

0.35 = \frac{1.75}{5}

0.35 = \frac{1.75µW}{5µW}

0.35 = \frac{1.75}{5}

Tip: Use pencil ( Pencil

) icon above to edit Input Values and Units.

Calculate

Recalculate

Solution

Copy

Reset

You are here -

Home » Category

Engineering » Category

Electronics » Category

Fiber Optic Transmission » fx Optical Modulation Index

Optical Modulation Index Solution

Follow our step by step solution on how to calculate Optical Modulation Index?

FIRST Step Consider the formula

m opt = \frac{P o}{P bi}

Next Step Substitute values of Variables

∴

m opt = \frac{1.75µW}{5µW}

Next Step Convert Units

∴

m opt = \frac{1.8E-6W}{5E-6W}

Next Step Prepare to Evaluate

∴

m opt = \frac{1.8E-6}{5E-6}

LAST Step Evaluate

∴

m opt = 0.35

Optical Modulation Index Formula Elements

Variables

Modulation Index

Modulation Index is defined as the amount by which the instantaneous power of the optical carrier varies around its average power.

Symbol: m_opt

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Modulation Index

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

Optical Power at Bias Current

Optical Power at Bias Current refers to the optical power output of a light source, such as a laser diode or an LED, when it is operating at a specific bias current.

Symbol: P_bi

Measurement: PowerUnit: µW

Note: Value should be greater than 0.

Formulas to find Optical Power at Bias Current

Other formulas in Transmission Measurements category

Go Optical Attenuation

α dB = \frac{10}{L 1 - L 2} \cdot \log 10 (\frac{V 2}{V 1})

Go Absorption Loss

α abs = \frac{C \cdot T ∞}{P opt \cdot t c}

Go Time Constant of Calorimeter

t c = \frac{t 2 - t 1}{\ln (T ∞ - T t1) - \ln (T ∞ - T t2)}

Go Scattering Loss

α sc = (\frac{4.343 \cdot 10^{5}}{l}) \cdot (\frac{V sc}{V opt})

How to Evaluate Optical Modulation Index?

Optical Modulation Index evaluator uses Modulation Index = Incident Power/Optical Power at Bias Current to evaluate the Modulation Index, Optical Modulation Index (OMI) is often used. OMI is defined as the amount by which the instantaneous power of the optical carrier varies around its average power. It is expressed in units of percentage (%) and is defined in the RFoG (RF over Glass Fiber) specification for amplitude modulation. Modulation Index is denoted by m_opt symbol.

How to evaluate Optical Modulation Index using this online evaluator? To use this online evaluator for Optical Modulation Index, enter Incident Power (P_o) & Optical Power at Bias Current (P_bi) and hit the calculate button.

FAQs on Optical Modulation Index

What is the formula to find Optical Modulation Index?

The formula of Optical Modulation Index is expressed as Modulation Index = Incident Power/Optical Power at Bias Current. Here is an example- 0.35 = 1.75E-06/5E-06.

How to calculate Optical Modulation Index?

With Incident Power (P_o) & Optical Power at Bias Current (P_bi) we can find Optical Modulation Index using the formula - Modulation Index = Incident Power/Optical Power at Bias Current.

Let Others Know

✖

Facebook

Twitter

Copied!

: Value
: Unit

Optical Modulation Index Formula

Optical Modulation Index Example

Optical Modulation Index Solution

Optical Modulation Index Formula Elements

Other formulas in Transmission Measurements category

How to Evaluate Optical Modulation Index?

FAQs on Optical Modulation Index

Variable Name