Abstract

Fiber-optic radio-frequency links have been assembled using oxide-confined vertical-cavity surface-emitting lasers (VCSELs) and multimode fibers. Links with single and multimode VCSELs and with standard and high-bandwidth fibers have been evaluated and compared in the frequency range of 0.1-10 GHz. The best results were obtained for links with a multimode VCSEL and a high-bandwidth fiber. For a 500-m-long link, a spurious free dynamic range of 104 dB · Hz^2/3 at 2 GHz and 100 dB · Hz^2/3 at 5 GHz were obtained while allowing for a VCSEL-fiber misalignment of ±12 µm. Corresponding numbers for the intrinsic link gain and noise figure are -29 and -33 dB, and 39 and 42 dB at 2 and 5 GHz, respectively. Inferior performance was observed for the standard fiber link due to a larger variation in modal group velocities. This paper also presents a detailed link analysis to identify performance limitations and to suggest modifications for improved performance.

© 2004 IEEE

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J. Lightwave Technol. (2)

Other (12)

D. Wake, S. Dupont, C. Lethien and J.-P. Vilcot, "Radio frequency transmission of 32-QAM signals over multimode fiber for distributed antenna system applications", Electron. Lett., vol. 37, pp. 1087-1089, 2001.

C. Cox, E. Ackerman, R. Helkey and G. E. Betts, "Techniques and performance of intensity-modulation direct-detection analog optical links", IEEE Trans. Microwave Theory Tech., vol. 45, pp. 1375-1383, Aug. 1997.

Å. Haglund, J. S. Gustavsson, C. Carlsson, J. Vukusic, P. Modh and A. Larsson, "High power single mode VCSEL's for optical links and interconnects", in Proc. Eur. Conf. Optical Communication (ECOC'03), vol. 6, 2003, pp. 76-77.

C. Carlsson, Å. Haglund, P. Modh, J. Gustavsson, J. Vukusic, A. Larsson and T. Marozsak, "New single mode VCSEL's for high performance fiber optic RF links", presented at the Int. Topical Meeting Microwave Photonics (MWP'03), Budapest, Hungary, Sept. 10-12, 2003.

D. M. Cutrer, J. B. George, T. H. Le and K. Y. Lau, "Dynamic range requirements for optical transmitters in fiber-fed microcellular networks", IEEE Photon. Technol. Lett., vol. 7, pp. 564-566, May 1995.

J. C. Fan, C. L. Lu and L. G. Kazovsky, "Dynamic range requirements for microcellular personal communication systems using analog fiber-optic links", IEEE Trans. Microwave Theory Tech., vol. 45, pp. 1390-1397, Aug. 1997 .

H. Al-Raweshidy, et al. Radio Over Fiber Technologies for Mobile Communications Networks , Norwood, MA: Artech House, 2002, p. 122.

A. Alping, "Radio-over-fiber for the radio access network", presented at the 6th Int. Symp. Contemp. Photon. Tech. (CPT03), Tokyo, Japan,Jan. 15-17, 2003.

R. E. Schuh, A. Alping and E. Sundberg, "Penalty-free GSM-1900 and WCDMA radio-over-fiber transmission using multimode fiber and 850 nm VCSEL", Electron. Lett., vol. 39, pp. 512-514, 2003.

P. Pepeljugoski, D. Kuchta, Y. Kwark, P. Pleunis and G. Kuyt, "15.6-Gb/s transmission over 1 km of next generation multimode fiber", IEEE Photon. Technol. Lett., vol. 14, pp. 717-719, May 2002.

C. Carlsson, H. Martinsson, R. Schatz, J. Halonen and A. Larsson, "Analog modulation properties of oxide confined VCSELs at microwave frequencies", J. Lightwave Technol. , vol. 20, pp. 1740-1749, Sept. 2002.

C. Carlsson, H. Martinsson, A. Larsson and A. Alping, "High performance microwave link using a multimode VCSEL and a high-bandwidth multimode fiber", in Proc. Int. Topical Meeting Microwave Photonics (MWP'01), 2002, pp. 81-84.

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