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We design an automatic photo-power control system (APC) to control Transmitter Optical Sub-Assembly (TOSA) optical-power to be stable at a wide range of temperature variation, prove long transmission distance for fiber transmission at high temperatures. The architecture of the APC circuit include current control and electrical-power control system has a microprocessor be core unit to send and receive...
Orthogonal frequency division multiplexing (OFDM) technique has been widely adopted in wireless communication systems. However, the study of OFDM technique for optical transmission system is still emerging in the research field. In this paper, we propose a baseband receiver architecture for the optical OFDM system. The baseband receiver contains frame detection, carrier frequency offset (CFO) estimation...
We propose and experimentally demonstrate a novel photonic scheme to generate differential-phase amplitude-shift keying (DPASK) or circular quadrature amplitude modulation (QAM) signal at microwave/millimeter-wave band for Radio-over-Fiber applications. In our proposed scheme, the electronic driven circuits are greatly simplified by employing photonic vector modulation technique in which only an electro-optical...
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