Optically injection-locked self-oscillating optoelectronic mixers based on InP-InGaAs HPTs for radio-on-fiber applications
ABSTRACT We demonstrate an optically injection-locked self-oscillating optoelectronic mixer (OIL-SOM) for radio-on-fiber downlink applications. OIL-SOM is based on a monolithic oscillator containing an InP-InGaAs heterojunction phototransistor (HPT). The oscillator is OIL by remotely delivered optical local oscillator (LO) signals, and provides low phase-noise and high-power electrical LO signals. In addition, the HPT in this oscillator can simultaneously perform optoelectronic mixing, in which optically transmitted intermediate frequency signals are up-converted to the desired radio-frequency band with high conversion efficiency. With these, OIL-SOM can make base station architecture simple in radio-on-fiber downlink systems.
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ABSTRACT: A 30 GHz hybrid-type optically injection-locked self-oscillating optoelectronic mixer is implemented with a high-performance InP/InGaAs heterojunction photo-transistor. Using this mixer as a harmonic up-converter, 60 GHz radio-on-fiber downlink transmission of 20 Mbps 16QAM data is successfully demonstrated. The link performance is uniform over a wide range of optical LO powers.Optical Fiber Communication Conference, 2006 and the 2006 National Fiber Optic Engineers Conference. OFC 2006; 04/2006
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ABSTRACT: Radio over fiber (RoF) technology is proposed solution for the reducing cost and providing highly reliable communication services. The system is very cost-effective solution by localization of signal processing in central station and also uses a simple base station. In this paper, two configurations of RoF system were presented. First, the intermediate frequency (IF) frequencies are upconverted to radio frequency (RF) at the central station and the RF are transmitted over single mode fiber directly at the radio carrier frequency. In the second configuration, the IF are transmitted over single mode fiber and converted to the original RF at the optical receiver. This report is focusing on the RoF optical frontend receiver configuration at the base station or also known as optical heterodyne receiver that employing an optoelectronic mixer. In this configuration, the receiver is performing photodetection and frequency conversion simultaneously. Thorough review and comparison of the previous works on the optoelectronic mixer and frequency conversion for up to millimeter-wave band will presented. Finally, the theoretical analysis and the harmonic balance modeling of the proposed optical front-end receiver and frequency up conversion system will be discussed.Circuits and Systems, 2008. APCCAS 2008. IEEE Asia Pacific Conference on; 01/2009