Dual-modulation of a novel electro-absorption modulated laser for radio-over-fiber systems

We present the first demonstration of the generation of single sideband (SSB) modulation using a monolithic integrated electro-absorption modulated laser (EML) device. Suppression of upper or lower sidebands is observed under synchronous dual analog narrow band driving of the laser and the modulator sections. The 10 GHz carrier can transport digital format data for a wide variety of Radio-over-Fiber (RoF) transmission systems. A 50 MBaud/s transmission of a 16-QAM signal has been achieved over 150 km of Standard Single Mode (SMF) fiber. Constellations, eye diagrams and error vector magnitude (EVM) measurements are presented, all of which are temperature independent up to 45°C. This demonstration of SSB modulation capability, which allows for signal transmission with a high spectral efficiency, free of side-band beating and with a uniform signal power over the entire length of the optical fiber, makes the device ideal for use in both optical metropolitan and optical access networks. Our experimental results establish the dual-EML SSB transmitter as a serious candidate for optical-wireless network convergence and future OFDM systems.

[1]  David M. Pozar,et al.  Microwave and Rf Design of Wireless Systems , 2000 .

[2]  Tom K. Johansen,et al.  Semi-Insulating Buried Heterostructure 1.55micrometer InGaAlAs Electroabsorption Modulated Laser with 60GHz Bandwidth , 2011 .

[3]  F. Devaux,et al.  Simple measurement of fiber dispersion and of chirp parameter of intensity modulated light emitter , 1993 .

[4]  Hanlim Lee,et al.  RoF Technologies for In-Building Wireless Systems , 2007, IEICE Trans. Electron..

[5]  Hoon Kim,et al.  EML-Based Optical Single Sideband Transmitter , 2008, IEEE Photonics Technology Letters.

[6]  D. Erasme,et al.  Enhanced 10-Gb/s NRZ transmission distance using dual modulation of an integrated electro-absoprtion modulated laser transmitter , 2009, 2009 Conference on Optical Fiber Communication - incudes post deadline papers.

[7]  W. Akhtar,et al.  Hybridization readiness for multiservice broadband networks , 2009, 2009 International Conference on Telecommunications.

[8]  H. Schmuck.  Comparison of optical millimetre-wave system concepts with regard to chromatic dispersion , 1995 .

[9]  D. Novak,et al.  Novel technique for generation of optical SSB with carrier using a single MZM to overcome fiber chromatic dispersion , 1996, International Topical Meeting on Microwave Photonics. MWP '96 Technical Digest. Satellite Workshop (Cat. No.96TH8153).

[10]  Tetsuya Kawanishi,et al.  Optical MSK transmitter using a monolithically integrated quad Mach-Zehnder IQ modulator , 2009, 2009 35th European Conference on Optical Communication.