Optimization of a 42.7 Gb/s wavelength tunable RZ transmitter using a linear spectrogram technique

Robert Maher, Prince M. Anandarajah, Andrew D. Ellis, Douglas Reid, Liam P. Barry

    Research output: Contribution to journalArticlepeer-review


    The optimization of a wavelength tunable RZ transmitter, consisting of an electro-absorption modulator and a SG DBR tunable laser, is carried out using a linear spectrogram based characterization and leads to 1500 km transmission at 42.7 Gb/s independent of the operating wavelength. We demonstrate that, to ensure optimum and consistent transmission performance over a portion of the C-band, the RF drive and bias conditions of the EAM must be varied at each wavelength. The sign and magnitude of the pulse chirp (characterized using the linear spectrographic technique) is therefore tailored to suit the dispersion map of the transmission link. Results achieved show that by optimizing the drive and DC bias applied to the EAM, consistent transmission performance can be achieved over a wide wavelength range. Failure to optimize the EAM drive conditions at each wavelength can lead to serious degradation in system performance.
    Original languageEnglish
    Pages (from-to)11281-11288
    Number of pages8
    JournalOptics Express
    Issue number15
    Publication statusPublished - 21 Jul 2008

    Bibliographical note

    © 2008 Optical Society of America
    This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OE.16.011281. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.


    Dive into the research topics of 'Optimization of a 42.7 Gb/s wavelength tunable RZ transmitter using a linear spectrogram technique'. Together they form a unique fingerprint.

    Cite this