A.1310nm B.1311nm C.1550nm D.1551nm
A.0.35dB/km B.0.38dB/km C.0.21dB/km D.0.24dB/km
A.體積常數(shù) B.衰減系數(shù) C.衰減常數(shù) D.相移常數(shù)