RFoG upstream frequency is which option?

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Multiple Choice

RFoG upstream frequency is which option?

Explanation:
In RFoG, signals travel in both directions over the same fiber, but they are carried on different wavelengths so the directions don’t interfere. The upstream path from the customer’s premises back to the headend is assigned a wavelength that takes advantage of the existing optical components and fiber characteristics, while remaining spectrally separate from the downstream signal. The upstream wavelength is chosen as 1550 nm because this window provides low fiber attenuation, making longer reach practical, and there is broad availability of cost-effective 1550 nm transceivers and passive components. Using 1550 nm for the upstream also aligns with common RFoG designs that reuse a similar laser family and filtering approaches as the downstream path, simplifying the overall architecture and maintenance. Wavelengths like 1310 nm, 1490 nm, or 1610 nm are associated with other PON architectures or additional DWDM channels, but they are not the standard upstream choice in typical RFoG deployments.

In RFoG, signals travel in both directions over the same fiber, but they are carried on different wavelengths so the directions don’t interfere. The upstream path from the customer’s premises back to the headend is assigned a wavelength that takes advantage of the existing optical components and fiber characteristics, while remaining spectrally separate from the downstream signal.

The upstream wavelength is chosen as 1550 nm because this window provides low fiber attenuation, making longer reach practical, and there is broad availability of cost-effective 1550 nm transceivers and passive components. Using 1550 nm for the upstream also aligns with common RFoG designs that reuse a similar laser family and filtering approaches as the downstream path, simplifying the overall architecture and maintenance.

Wavelengths like 1310 nm, 1490 nm, or 1610 nm are associated with other PON architectures or additional DWDM channels, but they are not the standard upstream choice in typical RFoG deployments.

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