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Title: Cost-effective and dispersion-tolerant cascade modulation for millimeter-wave-over-fiber applications
Authors: Kim, H. 
Keywords: Fiber dispersion
Photonic up-conversion
Sub-carrier multiplexing
Issue Date: 1-Mar-2008
Citation: Kim, H. (2008-03-01). Cost-effective and dispersion-tolerant cascade modulation for millimeter-wave-over-fiber applications. Optics Communications 281 (5) : 1108-1112. ScholarBank@NUS Repository.
Abstract: In millimeter-wave-over-fiber (MWoF) feeder systems, the received millimeter-wave signals at the remote antennas (RAs) can suffer from signal fading by chromatic dispersion of optical fiber. This can be substantially mitigated by Mach-Zehnder modulator (MZM) based photonic up-conversion technique. In this technique, the data signals at intermediate frequency (IF) are frequency up-converted to millimeter-wave frequency by an MZM biased at its transmission null point. However, this scheme requires a costly, high-speed MZM, which will hinder the widespread of this technique for cost-sensitive MWoF applications. Hence, we propose and demonstrate a cost-effective way of reducing the cost of MWoF optical transmitters based on photonic up-conversion technique. We employ a dual wavelength source composed of a directly modulated laser and a polarimetric filter. This source is used to generate a millimeter-wave tone signal and to frequency up-convert the IF data signals to millimeter-wave frequency. The dual wavelength source is also shared with numerous RAs for further cost reduction. Our experimental demonstration performed with 30 Msymbol/s 16-quadrature amplitude modulation signals shows that we can transmit the 20 GHz millimeter-wave signals over 25 km standard single-mode fiber without any transmission penalty. © 2007 Elsevier B.V. All rights reserved.
Source Title: Optics Communications
ISSN: 00304018
DOI: 10.1016/j.optcom.2007.10.101
Appears in Collections:Staff Publications

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