Introduction Overview of optical transmission band Band O – Band E – Band S – Band C – Band L – Band U – Band Wavelength range 1260 to 1360 nm 1360 to 1460 nm 1460 to 1530 nm 1530 to 1565 nm 1565 to 1625 nm 1625 to 1675 nm Description Original band Extended band Short wavelength band Conventional band Long wavelength band Ultra long wavelength band Conversion of attenuation to transmission ratio and attenuation ratio Attenuation (dB) 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0 Transmition ratio (%) ∼ 79.40 ~ 63.10 ~ 50.10 ~ 39.80 ~ 31.60 ~ 25.10 ~ 19.90 ~ 15.80 ~ 12.60 ~ 10.00 ~ 7.90 ~ 6.30 ~ 5.00 ~ 4.00 ~ 3.20 ~ 2.50 ~ 2.00 ~ 1.60 ~ 1.30 ~ 1.00 Attenuation ratio (%) ~ 20.60 ~ 36.90 ~ 49.90 ~ 60.20 ~ 68.40 ~ 74.90 ~ 80.10 ~ 84.20 ~ 87.40 ~ 90.00 ~ 92.10 ~ 93.70 ~ 95.00 ~ 96.00 ~ 96.80 ~ 97.50 ~ 98.00 ~ 98.40 ~ 98.70 ~ 99.00 HUBER+SUHNER Passive components 5
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