Optically injection-locked self-oscillating optoelectronic mixers based on InP-InGaAs HPTs for radio-on-fiber applications

Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea
IEEE Photonics Technology Letters (Impact Factor: 2.04). 12/2005; DOI: 10.1109/LPT.2005.857624
Source: IEEE Xplore

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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