Design and implementation of ASK heterodyne asynchronous demodulation receiver

Xi Xiao; Ming-song Chen; Xiao-na Li

doi:10.1117/12.900827

11 August 2011 Design and implementation of ASK heterodyne asynchronous demodulation receiver

Xi Xiao, Ming-song Chen, Xiao-na Li

Proceedings Volume 8195, International Symposium on Photoelectronic Detection and Imaging 2011: Terahertz Wave Technologies and Applications; 81951D (2011) https://doi.org/10.1117/12.900827
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China

Abstract

The amplitude modulation/direct detection (IM/DD) method is adopted to achieve communication in the practical optical fiber communication system at present. By comparison with the traditional direct detection system, coherent optical transmission system has a lot of advantages, such as high sensitivity, long relay distance, good selectivity, large communication capacity and a variety of modulations. Based on coherent detection principle, ASK heterodyne asynchronous demodulation system is researched and designed. The signal light and the local oscillator light are mixed through the mixer. Then through the photoelectric conversion the intermediate frequency (IF) current signal is obtained when the difference frequency signal is input to detector. And then the signal in form of baseband signal is output after photocurrent signals passing through the electrical signal processing system. In paper, the circuit of receiver is implemented. And the correctness of circuit design is demonstrated by experiment. It lays a solid groundwork for further study of Heterodyne Asynchronous Demodulation System of coherent optical communications.

Citation Download Citation

Xi Xiao, Ming-song Chen, and Xiao-na Li "Design and implementation of ASK heterodyne asynchronous demodulation receiver", Proc. SPIE 8195, International Symposium on Photoelectronic Detection and Imaging 2011: Terahertz Wave Technologies and Applications, 81951D (11 August 2011); https://doi.org/10.1117/12.900827

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KEYWORDS

Demodulation

Heterodyning

Optical communications

Telecommunications

Receivers

Amplitude shift keying

Modulation

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