A wavelength assignment system in one embodiment includes an upstream port, a sensor port, and a downstream port. The upstream port is configured to receive a transmitted signal including a drive component and a read component comprising individual read channel components at corresponding individual read wavelengths. The sensor port is configured to provide a sensor component of the transmitted signal including a sensor portion of the drive component and substantially all of an individual read channel component to a sensor. The downstream port is configured to provide a downstream component including a downstream portion of the drive component and at least one additional read channel component of the transmitted signal to at least one additional sensor disposed downstream of the sensor. The wavelength assignment system is configured to receive the transmitted signal and separate the transmitted signal into the sensor component and the downstream component.