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Proceedings Paper

Super-linear modulator with extended bandwidth capability for broadband access applications
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Paper Abstract

Ultra-linear modulators are critical components for broadband access applications in analog fiber-optic communication links, such as Radio-over-Fiber (RoF), Radio-over-Free Space (RoFS) and ultra-dense (cable television) CATV. In our previous work, it was shown that an ultra-linear optical modulator - composed of a phase modulator and ring resonator in a Mach-Zehnder (MZ) configuration, exhibited SFDR values > 130 dB. In this paper, we introduce a new configuration based on a lumped electrode design, in which the phase modulator (PM) is on one arm of the MZ and the ring resonator (RR) is located on the other arm. We also carefully control and monitor the power split ratio of an RF input to both the PM and the RR, in addition to the RF phase bias between the RR and PM. We report its unique and superior features such as superior linearity (SFDR ~ 133 dB), modulation bandwidth extension (as much as 70%) over the ring resonator-assisted Mach Zehnder design and high link gain. Lastly, we discuss the merits of the design flexibility, practicality and ease of use of the new modulator.

Paper Details

Date Published: 26 January 2009
PDF: 8 pages
Proc. SPIE 7234, Broadband Access Communication Technologies III, 72340E (26 January 2009); doi: 10.1117/12.808230
Show Author Affiliations
Andru Prescod, City College of CUNY (United States)
Corning, Inc. (United States)
Benjamin B. Dingel, Nasfine Photonics, Inc. (United States)
Nicholas Madamopoulos, Corning, Inc. (United States)

Published in SPIE Proceedings Vol. 7234:
Broadband Access Communication Technologies III
Benjamin B. Dingel; Raj Jain; Katsutoshi Tsukamoto, Editor(s)

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