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Calculating Transponder bandwidth

Last Updated: August 16, 2025
1 min read
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Transponder bandwidth is the product of Modulation , Baud Rate and the Polarisation.

BW=Modulation x Baud x Polarisation

Following table will give an idea for various bit rates:-

Calculating Transponder bandwidth - Image 1Calculating Transponder bandwidth - Image 2

Ex:

Modulation = 2 (bits/s/Hz)

Baud Rate = 32G

Polarisation= 2

BW= 2 x 32 x 2 =128Gbps

Sanjay Yadav

Optical Communications & Network Automation Expert | Author of 3 Books for Optical Engineers | Founder, MapYourTech

Optical networking engineer with nearly two decades of experience across DWDM, OTN, coherent optics, submarine systems, and cloud infrastructure. Founder of MapYourTech.

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