Title :
Fiber-Optic 60-GHz Wireless Downlink Using Cross-Absorption Modulation in an EAM
Author :
Park, Chul Soo ; Guo, Y. ; Yeo, Y.K. ; Wang, Y. ; Ong, L.C. ; Kato, S.
Author_Institution :
Inst. for Infocomm Res., Singapore
fDate :
4/15/2008 12:00:00 AM
Abstract :
We demonstrate the 60-GHz radio-over-fiber downlink adopting the fiber-optic upconversion process. The cross-absorption modulation (XAM) in the multiple-quantum-well electroabsorption modulator (MQW-EAM) is incorporated for the fiber-optic upconversion. Error-free transmission of the 1.25-Gb/s and 622.08-Mb/s pseudorandom bit sequence data is achieved without critical power penalties after the fiber transmission up to 34 km followed by 1-m wireless transmission between the base station and the customer unit. The system performance is dependent on the bias voltage asserted to the MQW-EAM due to the bias-dependent modulation characteristics of XAM and absorption changes. The optimum performance is obtained at the bias of -0.8 V.
Keywords :
electro-optical modulation; electroabsorption; optical communication equipment; optical links; quantum well devices; radio-over-fibre; MQW-EAM; bias-dependent modulation characteristics; bit rate 1.25 Gbit/s; bit rate 622.08 Mbit/s; cross-absorption modulation; distance 1 m; error-free transmission; fiber-optic upconversion process; fiber-optic wireless downlink; frequency 60 GHz; multiple-quantum-well electroabsorption modulator; pseudorandom bit sequence data; radio-over-fiber downlink; voltage -0.8 V; wireless transmission; Downlink; Optical fiber polarization; Optical fibers; Optical filters; Optical modulation; Optical network units; Optical pumping; Optical wavelength conversion; Phase modulation; Quantum well devices; Cross-absorption modulation (XAM); multiple- quantum-well electroabsorption modulator (MQW-EAM); photonic upconversion; radio-over-fiber (RoF) system; wireless downlink;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2008.918827
