This paper investigates the use of optical spectrum slicing techniques for radio over fibre networks. We show that the transmission of complex-modulated data is possible by directly modulating a Super-luminescent Light Emitting Diode (SLED) with an Intermediate Frequency (IF) signal. This signal can then be up-converted to a higher frequency (18 GHz) using a Mach-Zehnder modulator. This has the advantage that a number of WDM channels can be up-converted using a single device. We demonstrate that due to dispersion the system performance over a given distance decreases as the width of the slice increases. This runs counter to the usual trend observed in spectrum slicing systems whereby, an increase in slice width is required to increase SNR. It is shown that although optical suppressed carrier modulation is used the length dependant nulls can be observed due to the width of the slices. It is seen that the intensity noise of the source and the required optical amplification stage degrades the signal by introducing intensity noise on the received signal. We detail the achievable performance of such a system with the potential to be used with multiple WDM channels.
John E. Mitchell, John E. Mitchell,
"Data transmission using a spectrum sliced, radio-over-fibre link", Proc. SPIE 6194, Millimeter-Wave and Terahertz Photonics, 619404 (19 April 2006); doi: 10.1117/12.663121; https://doi.org/10.1117/12.663121