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Pros and Cons of fiber transmission bands

Band Name Wavelengths Description
O-band 1260 – 1360 nm Original band, PON upstream
E-band 1360 – 1460 nm Water peak band
S-band 1460 – 1530 nm PON downstream
C-band 1530 – 1565 nm Lowest attenuation, original DWDM band, compatible with fiber amplifiers, CATV
L-band 1565 – 1625 nm Low attenuation, expanded DWDM band
U-band 1625 – 1675 nm Ultra-long wavelength

 

O-Band
PRO
• Lowest fiber dispersion -no DCM for 20km PMDs*
• Existing cooled 100GLR4 lasers and EMLs
• Existing high power uncooled 25G lasers
CON
• High fiber insertion loss
• Limited fiber spectrum – 10G WDM coexistence and zero dispersion zone
• SOA preamp has high NF
• SOA booster has limited Psat

S-Band
PRO
• Low fiber insertion loss
• Moderate fiber dispersion — no DCM for 10km PMDs
• Open fiber spectrum — no coexistence objectives
CON
• DCM required for 20km PMDs
• No existing 25G sources
• SOA preamp has high NF
• SOA booster has limited Psat

C-Band
PRO
• Low fiber insertion loss
• Moderate fiber dispersion — no DCM for 10km PMDs
• High power booster EDFAs
• Low-NF preamp EDFAs
CON
• DCM required for 20km PMDs
• 10G WDM coexistence prevents use of 1560- 1600nm

L-Band
PRO
• Low fiber insertion loss
• High power booster EDFAs
• Low-NF preamp EDFAs
CON
• High fiber dispersion — DCM required for all PMDs
• Limited fiber spectrum – 10G WDM coexistence and OTDR band
• Lower laser efficiency

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