Wideband optoelectronic mixer for radio over fibre applications at 28/38/60GHz

The authors propose a high speed optoelectronic millimetre-wave mixer, realised From the hybridisation of a wideband amplifier and a fast DFB laser that operates in the 20-60GHz range. This source relies on a local oscillator (LO) port, using < 10dBm of electrical modulation power at a modulation frequency in thr 5-10GHz range. These features are compatible with a commercially available RF oscillator. With a 32GHz/0.3A/W photodiode, the power levels obtained at 28 and 38GHz are -23 and -33dBm respectively. Assuming a flatband photodiode, > -40dBm of electrical power is expected at 60GHz.