Novel electro-optical predistortion technique and its application in externally modulated CATV transmission systems

Kuen-Ting Tsai; Chien Tai; Winston I. Way

doi:10.1117/12.312842

19 June 1998 Novel electro-optical predistortion technique and its application in externally modulated CATV transmission systems

Kuen-Ting Tsai, Chien Tai, Winston I. Way

Author Affiliations +

Proceedings Volume 3420, Optical Fiber Communication; (1998) https://doi.org/10.1117/12.312842
Event: Asia Pacific Symposium on Optoelectronics '98, 1998, Taipei, Taiwan

Abstract

Conventional linearization techniques such as electrical pre-distortion or optical feedforward methods have been applied to Mach-Zehnder interferometer (MZI) modulators for CATV transmission systems. However, both methods can only ensure that the output of the MZI modulator meet the standard CATV requirements on composite second-order and composite triple beat, but cannot guarantee a satisfactory end-to-end system linearity. In this paper, we propose and demonstrate a novel linearization technique, which can simultaneously suppress the nonlinear distortions generated in a transmission system and increase the received carrier- to-noise ratio. This technique is based on offsetting the MZI bias voltage from its inflection point. Both analytical and experimental results are presented.

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Kuen-Ting Tsai, Chien Tai, and Winston I. Way "Novel electro-optical predistortion technique and its application in externally modulated CATV transmission systems", Proc. SPIE 3420, Optical Fiber Communication, (19 June 1998); https://doi.org/10.1117/12.312842

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