An integrated Mach-Zehnder modulator bias controller based on eye-amplitude monitoring

Min Hyeong Kim, Hyun Yong Jung, Lars Zimmermann, Woo Young Choi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

A novel integrated Mach-Zehnder modulator (MZM) bias controller based on eye-amplitude monitoring is demonstrated in IHP's 0.25-μm BiCMOS technology. The bias controller monitors the MZM output light, automatically moves the MZM bias voltage to the optimal value that produces the largest eye amplitude, and maintains it there even if the MZM transfer characteristics change due to thermal drift. The controller is based on the feedback loop consisting of Si photodetector, trans-impedance amplifier, rectifier, square amplifier, track-and-hold circuit, comparator, polarity changer, and charge-pump, all of which are monolithically integrated. The area of the controller is 0.083-mm2 and it consumes 92.5-mW. Our bias controller shows successful operation for a commercially-available 850-nm LiNbO3 MZM modulated with 3-Gbps PRBS data by maintaining a very clean eye for at least 30 minutes. Without the controller, the eye for the same MZM modulation becomes completely closed due to thermal drift. The data rate is limited by the Si PD integrated in the controller not by the controller architecture. Since our controller is based on the Si BiCMOS technology which can also provide integrated Si photonics devices on the same Si, it has a great potential for realizing a Si MZM with an integrated bias controller, which should fully demonstrate the advantage of electronic-photonic integrated circuit technology.

Original languageEnglish
Title of host publicationSmart Photonic and Optoelectronic Integrated Circuits XVIII
EditorsEl-Hang Lee, Louay A. Eldada, Sailing He
PublisherSPIE
ISBN (Electronic)9781628419863
DOIs
Publication statusPublished - 2016
EventSmart Photonic and Optoelectronic Integrated Circuits XVIII - San Francisco, United States
Duration: 2016 Feb 162016 Feb 18

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9751
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherSmart Photonic and Optoelectronic Integrated Circuits XVIII
CountryUnited States
CitySan Francisco
Period16/2/1616/2/18

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Kim, M. H., Jung, H. Y., Zimmermann, L., & Choi, W. Y. (2016). An integrated Mach-Zehnder modulator bias controller based on eye-amplitude monitoring. In E-H. Lee, L. A. Eldada, & S. He (Eds.), Smart Photonic and Optoelectronic Integrated Circuits XVIII [97510X] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9751). SPIE. https://doi.org/10.1117/12.2213762