๐ง๐ต๐ฒ ๐ฅ๐ฒ๐ฎ๐น ๐ง๐ฟ๐ฎ๐ฑ๐ฒ-๐ข๐ณ๐ณ ๐๐ฒ๐ต๐ถ๐ป๐ฑ ๐๐ผ๐ต๐ฒ๐ฟ๐ฒ๐ป๐ ๐ข๐ฝ๐๐ถ๐ฐ๐: ๐๐ฎ๐๐ฑ, ๐ค๐๐ & ๐ข๐ฆ๐ก๐ฅ
#WeekendWavelength
Modern coherent optics isnโt about โfaster wavelengths.โ
Itโs about managing the trade-off between ๐๐ฎ๐๐ฑ ๐ฟ๐ฎ๐๐ฒ, ๐ค๐๐ ๐ฑ๐ฒ๐ฝ๐๐ต, and ๐ข๐ฆ๐ก๐ฅ ๐ต๐ฒ๐ฎ๐ฑ๐ฟ๐ผ๐ผ๐บ. Because when you push one too far, the others become the bottleneck.
Increasing baud rate shrinks symbol duration.
Increasing QAM tightens constellation spacing.
Combine both and ๐ข๐ฆ๐ก๐ฅ ๐ฑ๐ฒ๐บ๐ฎ๐ป๐ฑ ๐๐ธ๐๐ฟ๐ผ๐ฐ๐ธ๐ฒ๐๐.
โข ๐ค๐ฃ๐ฆ๐ survives almost anywhere
โข ๐ญ๐ฒ๐ค๐๐ thrives when fiber is clean
โข ๐ฒ๐ฐ๐ค๐๐ delivers huge capacity, ๐ผ๐ป๐น๐ with excellent OSNR
And this is where production networks struggle, especially in ๐๐ฃ๐๐.
Legacy ๐.๐ฒ๐ฑ๐ฎ/๐.๐ฒ๐ฑ๐ฑ, long ๐๐๐๐-๐ผ๐ป๐น๐ ๐๐ฝ๐ฎ๐ป๐, ROADM insertion loss, and amplifier ASE noise degrade OSNR long before provisioning.
DSP can correct a lot, but it cannot rewrite physics.
Once constellation separation collapses, no FEC on earth will save the channel.
Thatโs why ๐ฐ๐ฌ๐ฌ๐ remains the backbone workhorse,
and ๐ด๐ฌ๐ฌ๐ is a metro privilege, not a default upgrade.
๐๐ผ๐ต๐ฒ๐ฟ๐ฒ๐ป๐ ๐ฑ๐ฒ๐๐ถ๐ด๐ป ๐ถ๐๐ปโ๐ ๐ฎ๐ฏ๐ผ๐๐ ๐ฐ๐ต๐ฎ๐๐ถ๐ป๐ด ๐๐ฝ๐ฒ๐ฒ๐ฑ.
๐๐โ๐ ๐ฎ๐ฏ๐ผ๐๐ ๐ฟ๐ฒ๐๐ฝ๐ฒ๐ฐ๐๐ถ๐ป๐ด ๐๐ถ๐ด๐ป๐ฎ๐น-๐๐ผ-๐ป๐ผ๐ถ๐๐ฒ ๐ฟ๐ฒ๐ฎ๐น๐ถ๐๐.
