Wavelength Bands According to ITU

Optical Wavelength Bands ที่กำหนดโดย ITU-T พร้อมความหมายของตัวย่อ

Band Range (nanometres)
O (Original) 1260-1360
E (Extended) 1360-1460
S (Short Wavelength) 1460-1530
C (Conventional) 1530-1565
L (Long Wavelength) 1565-1625
U (Ultra-long wavelength) 1625-1675

ส่วน amplifier แบบที่เป็น Rare Earth ที่ใช้ก็จะมี Erbium, Thulium และ Praseodymium โดย Erbium จะทำงานในย่าน C+L Band, Thulium ขยายได้ในย่าน S Band และ Praseodymium ขยายได้ในย่าน O Band ย่าน E Band ยังไม่เห็นมีการพูดถึง

EDFA (ใช้ Erbium), TDFA (ใช้ Thulium), PDFA (ใช้ Praseodymium)

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