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HomeTechnicalPage 32

Technical

Showing 311 - 320 of 336 results

HD-FEC & SD-FEC differences

Items HD-FEC SD-FEC Definition Decoding based on hard-bits(the output is quantized only to two levels) is called the “HD(hard-decision) decoding”,...
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  • March 26, 2025
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Power Change during add/remove of channels on filters

Power Change during add/remove of channels on filters The power change can be quantified as the ratio between the number...
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  • March 26, 2025
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Why is it preferable to put attenuator/pad at the Receive end of Optical Module?

Few analogies proving the subject:- If the distance is to short and the attenuator is too close to the transmitter,...
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  • March 26, 2025
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Maximum number of erbium-doped fiber amplifiers in a DWDM lin

The maximum number of erbium-doped fiber amplifiers (EDFAs) in a fiber chain is about four to  six.   Explanation  The rule is based on...
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  • March 26, 2025
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How and where do we get pre and post FEC BER?

The first thing to note is that for each frame there are two sets of 20 parity bits. One set...
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  • March 26, 2025
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Optical Fiber Link Design requirements

Optical Fiber Link Design requirements The optical link design essentially is putting the various optical components, so that information can...
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  • March 26, 2025
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Temperature dependency of EDFA Gain for various channels

Here the results are after evaluating the effect of a thermal variation on the output tilt. In this particular set-up the...
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  • March 26, 2025
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Difference between EDFAs requirements for Terrestrial(Land) Systems and Submarine Systems.

Compared with requirements for EDFAs for terrestrial applications and for Submarine applications, there are major important differences making the two...
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  • March 26, 2025
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Spectral Hole Burning (SHB) phenomenon in Optical Networks

Spectral Hole Burning (SHB) Spectral hole burning (SHB) is a major limitation of amplified WDM systems with high channel count. The...
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  • March 26, 2025
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Techniques/technologies to mitigate compensation in long haul submarine optical networks

Map of transmission impairments in long-haul submarine systems and some techniques/technologies for their mitigation or compensation.  ... Membership Required You...
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  • March 26, 2025
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