Abstract
A new microwave photonic frequency up converter is presented. It is capable to generate an up converted upper or lower sideband RF signal with the other sideband and the LO being suppressed. Compared to the reported photonics-based single sideband (SSB) frequency up converters, the proposed structure is simple and does not require high-frequency electrical components. The upper or lower sideband can be selected by controlling a modulator bias voltage. The new photonics-based SSB mixer is experimentally verified. Around 30 dB suppression in the undesired frequency components adjacent to the up converted RF signal is demonstrated for different input LO and IF signal frequencies when the SSB mixer is operated in either upper or lower sideband mode.
Highlights
Transmitting radio frequency (RF) signals through optical fibres, which is referred to as radio-overfibre (RoF), is widely used in today’s communication
This was followed by a tunable optical filter with 0.5 nm 3-dB bandwidth for suppressing the amplified spontaneous emission noise generated by the erbium-doped fibre amplifier (EDFA)
The results demonstrate the local oscillator (LO), undesired sideband and harmonic components are largely suppressed for the mixer operated in either a lower sideband (LSB) or upper sideband (USB) mode, and the two modes can be switched by adjusting a modulator bias voltage
Summary
W. Chan , Senior Member, IEEE, and Chirappanath B. College of Engineering, IT and Environment, Charles Darwin University, Darwin, NT 0909, Australia.
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