| 单词 | ZWPF (Zero-Water-Peak Fiber) |
| 释义 | ZWPF (Zero-Water-Peak Fiber) Single-mode fiber (SMF) manufactured without hydroxyl (OH) ion contamination in order eliminate the attenuation peak in the 1400 nm window, which is in the Eband (1360–1460 nm). The traditional SMF manufacturing process introduces hydroxyl (OH) ions into the fiber core. Wavelengths in the region around 1400 nm attenuate about 2 dB/km as a result of their interaction with those ions. As traditional single-wavelength fiber optic transmission systems (FOTS) employing SMF operate in the 1310 nm or 1550 nm window, water peak attenuation does not affect them. However, 4 of the 18 channels in coarse wavelength division multiplexing (CWDM) systems fall within the E-band and, therefore, are rendered unusable by water peak attenuation. Low–water-peak fiber (LWPF) has low levels of hydroxyl ion contamination and, therefore, suffers low water peak attenuation. ZWPF is the contemporary industry standard for all SMF. See also attenuation, CWDM, dB, dB/km, E-band, FOTS, hydroxyl, LWPF, SMF, water peak, wavelength, and window. 74570c26.qxd 9/11/07 12:39 PM Page 560 74570bapp01.qxd 9/11/07 12:39 PM Page 561 |
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