Modulation Index - Optiwave

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This topic has 4 replies, 2 voices, and was last updated 9 years, 12 months ago by Ravil.

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- May 16, 2015 at 9:03 am #20863
  
  Muhammad Mansoor Ashraf
  Participant
  
  I want to work on Modulation index, but I do not know in which block it exists. Kindly guide me!
- May 17, 2015 at 1:03 am #20875
  
  Ravil
  Participant
  
  Hi Muhammad,
  
  If you are working on your project with OptiSystem, then the modulation index you are looking for is the essential characteristic of the laser source that you are using at the transmitter. In any laser based system, the optical modulation index (OMI) is a measure of how much the modulation signal affects the light output, and is measured in %. It serves for verification of optimal operation point of this laser. Typical OMI values depend on the type of laser being used.
- May 17, 2015 at 1:07 am #20876
  
  Ravil
  Participant
  
  For example, DFB lasers are the preferred lasers for high-speed fiber-optical telecommunication systems today because of their spectral purity, linearity and excellent power output levels. They have the highest modulation index as well. The typical OMI for DFB is in the range of 19 to 25%.
- May 18, 2015 at 5:35 am #20885
  
  Muhammad Mansoor Ashraf
  Participant
  
  Thanks Ravil.
- May 18, 2015 at 6:43 pm #20907
  
  Ravil
  Participant
  
  You are welcome, Muhammad! Good luck with your work!
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