Werner Kuhn: Difference between revisions

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Hi there, I am Sophia. To climb is some thing I truly appreciate doing. Distributing manufacturing has been his profession for some time. Some time in the past he selected to live in North Carolina and he doesn't plan on changing it.<br><br>Feel free to visit my webpage [http://www.youronlinepublishers.com/authWiki/AdolphvhBladenqq psychics online]
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In [[telecommunication]]s, '''optical modulation amplitude (OMA)''' is the difference between two optical [[Power (physics)|power]] levels, of a [[digital signal]] generated by an [[optical source]], ''e.g.,'' a [[laser diode]].
 
It is given by
 
:<math>\text{OMA} = P_1 - P_0 \, </math>
 
where ''P''<sub>1</sub> is the optical power level generated when the [[light]] source is "on," and ''P''<sub>0</sub> is the power level generated when the light source is "off."  The OMA may be specified in peak-to-peak [[Milliwatt|mW]].  
 
The OMA can be related to the average power <math>P_{\text{av}} = (P_1+P_0)/2</math> and the extinction ratio <math>r_{e} = P_{1}/P_{0}</math>
 
:<math> \text{OMA} = 2 P_{\text{av}} \frac{r_{e}-1}{r_{e}+1}</math>
 
In the limit of a high extinction ratio, <math> \text{OMA} \approx 2P_{av} </math>.  However, OMA is often used to express the effective usable modulation in a signal when the extinction ratio is not high and this approximation may not be valid.
 
==External links==
*[http://grouper.ieee.org/groups/802/3/ae/public/nov00/ohlen_2_1100.pdf OMA presentation by Optillion, New Orleans, September 2000]
 
[[Category:Optical communications]]

Latest revision as of 12:58, 1 December 2014

Hi there, I am Sophia. To climb is some thing I truly appreciate doing. Distributing manufacturing has been his profession for some time. Some time in the past he selected to live in North Carolina and he doesn't plan on changing it.

Feel free to visit my webpage psychics online

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