Opto-electrical predistortion method using nonlinearity of schottky diode for radio-over-fiber systems

Byung-Hee Son; Kwang-Jin Kim; Ye Li; Young-Wan Choi

doi:10.1117/12.2039310

1 February 2014 Opto-electrical predistortion method using nonlinearity of schottky diode for radio-over-fiber systems

Byung-Hee Son, Kwang-Jin Kim, Ye Li, Young-Wan Choi

Proceedings Volume 9007, Broadband Access Communication Technologies VIII; 90070C (2014) https://doi.org/10.1117/12.2039310
Event: SPIE OPTO, 2014, San Francisco, California, United States

Abstract

In this paper, we propose a simple and efficient predistortion method using schottky diodes to compensate the nonlinearity of RoF systems. L-I curve in LD is compared with I-V curve in schottky diode and the nonlinear characteristics are analyzed. The predistortion circuit has been designed with two paths. One path is the nonlinearity generation circuit with schottky diode, while the other path has only a time delay. Then, these two paths are recombined to suppress the IMD3 (3^rd inter - modulation distortion) of LD. Experimental results show that the enhancements of about 26 dBc in the IMD3 and about 8.5 dB in the SFDR are achieved at 2.4 GHz.

Citation Download Citation

Byung-Hee Son, Kwang-Jin Kim, Ye Li, and Young-Wan Choi "Opto-electrical predistortion method using nonlinearity of schottky diode for radio-over-fiber systems", Proc. SPIE 9007, Broadband Access Communication Technologies VIII, 90070C (1 February 2014); https://doi.org/10.1117/12.2039310

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