Single-sideband transmission using optical mixing in an electroabsorption modulator

Yang Wu; William S. C. Chang; Paul K. L. Yu

doi:10.1117/12.475837

9 July 2003 Single-sideband transmission using optical mixing in an electroabsorption modulator

Yang Wu, William S. C. Chang, Paul K. L. Yu

Proceedings Volume 4998, Photonic Integrated Systems; (2003) https://doi.org/10.1117/12.475837
Event: Integrated Optoelectronics Devices, 2003, San Jose, CA, United States

Abstract

Electroabsorption modulators (EAM) have been widely used in externally modulated RF link. In the conventional intensity modulation format, the RF efficiency of such link is critically dependent on the optical saturation of the EAM and the fiber dispersion. In an effort to minimize the dependence on these two factors, we have conducted an experimental study of an optical mixer that employs two heterodyned lasers to generate an optical local oscillator (LO). In contrast to the conventional schemes where both laser beams are launched into the same EAM, the EAM in the present scheme modulates only one of the laser beams. In this way, improvement in RF gain is obtained since it is not limited by the optical saturation of the EAM. The resulting optical spectrum shows that this scheme is equivalent to the optical single side band transmission. For sub-octave bandwidth applications, the dispersion effect in the fiber can be ignored.

Citation Download Citation

Yang Wu, William S. C. Chang, and Paul K. L. Yu "Single-sideband transmission using optical mixing in an electroabsorption modulator", Proc. SPIE 4998, Photonic Integrated Systems, (9 July 2003); https://doi.org/10.1117/12.475837

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