Theoretical and experimental investigations of the dynamic range of high-frequency coherent AM optical links using semiconductor lasers

Delfin Jay M. Sabido; Masafumi Tabara; Thomas K. Fong; C. L. Lu; Leonid G. Kazovsky

doi:10.1117/12.161323

1 November 1993 Theoretical and experimental investigations of the dynamic range of high-frequency coherent AM optical links using semiconductor lasers

Delfin Jay M. Sabido, Masafumi Tabara, Thomas K. Fong, C. L. Lu, Leonid G. Kazovsky

Author Affiliations +

Proceedings Volume 2024, Multigigabit Fiber Communication Systems; (1993) https://doi.org/10.1117/12.161323
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

In this paper, we theoretically and experimentally investigate the spurious-free dynamic range of an externally modulated coherent AM optical link. The coherent link's performance is also compared to a similar direct detection link. Semiconductor lasers are used as the optical transmitter and local oscillator lasers. However, the wide linewidth of semiconductor lasers can cause substantial performance degradation of coherent links. We show that by using a coherent receiver structure consisting of a wideband filter, rectifier and narrowband lowpass filter, and by selecting a wide enough bandpass filter, the coherent AM link can be made linewidth-insensitive. We also show that for low optical powers, the coherent AM link has a better spurious-free dynamic range than a similar direct detection link, and that laser RIN is not a significant effect.

Citation Download Citation

Delfin Jay M. Sabido, Masafumi Tabara, Thomas K. Fong, C. L. Lu, and Leonid G. Kazovsky "Theoretical and experimental investigations of the dynamic range of high-frequency coherent AM optical links using semiconductor lasers", Proc. SPIE 2024, Multigigabit Fiber Communication Systems, (1 November 1993); https://doi.org/10.1117/12.161323

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