OSA's Digital Library

Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 24, Iss. 12 — Dec. 1, 2006
  • pp: 4974–4982

Gain Optimization by Modulator-Bias Control in Radio-Over-Fiber Links

Marco Michele Sisto, Sophie LaRochelle, and Leslie Ann Rusch

Journal of Lightwave Technology, Vol. 24, Issue 12, pp. 4974-4982 (2006)


View Full Text Article

Acrobat PDF (407 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations
  • Export Citation/Save Click for help

Abstract

The authors propose a method to optimize the RF gain in narrowband radio-over-fiber links employing a Mach–Zehnder modulator followed by an erbium-doped fiber amplifier (EDFA) for amplification. Optimization is achieved by control of the modulator bias in order to improve the signal optical-modulation depth (OMD). Thus, for a given modulation amplitude, the optical signal has a reduced mean optical power and can access the small signal gain of the EDFA. This unsaturated gain is higher than the saturated one, thereby significantly increasing the RF gain of the link. Simultaneous optimization of OMD is also desirable to reduce detector saturation and fiber-induced nonlinear effects. They derive an analytical expression to describe optimum operating conditions for the modulator bias and validate their results through numerical simulation and experimental work. The proposed optimum modulator operating point is experimentally proven to be applicable to multicarrier signals like those used in 802.11a/g protocols.

© 2006 IEEE

Citation
Marco Michele Sisto, Sophie LaRochelle, and Leslie Ann Rusch, "Gain Optimization by Modulator-Bias Control in Radio-Over-Fiber Links," J. Lightwave Technol. 24, 4974-4982 (2006)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-24-12-4974


Sort:  Journal  |  Reset

References

  1. M. R. Phillips, "Amplified 1550-nm CATV lightwave systems," Optical Fiber Commun. (OFC) Conf. Exh. Tech. Dig. (1998) pp. 85-86.
  2. M. L. VanBlaricum, "Photonic systems for antenna applications," IEEE Aerospace Applications Conf. VailCO (1994).
  3. D. J. M. Sabido, L. G. Kazovsky, "Dynamic range of optically amplified RF optical links," IEEE Trans. Microw. Theory Tech. 49, 1950-1955 (2001).
  4. R. D. Esman, K. J. Williams, "Measurement of harmonic distortion in microwave photodetectors," IEEE Photon. Technol. Lett. 2, 502-504 (1990).
  5. I. Paslaski, P. C. Chen, I. S. Chen, N. Bar-Chaim, "High-power microwave photodiode for high-dynamic-range analog transmission," Conf. Optical Fiber Commun. (OFC) San JoseCA (1994) Paper ThG5.
  6. B. H. Kolner, D. W. Dolfi, "Intermodulation distortion and compression in an integrated electrooptic modulator," Appl. Opt. 26, 3676-3680 (1987).
  7. E. Ackerman, S. Wanuga, D. Kasemset, A. S. Daryoush, N. R. Samant, "Maximum dynamic range operation of a microwave external modulation fiber-optic link," IEEE Trans. Microw. Theory Tech. 41, 1299-1306 (1993).
  8. B. H. Kolner, D. M. Bloom, "Electrooptic sampling in GaAs integrated circuits," IEEE J. Quantum Electron. QE-22, 79-93 (1986).
  9. C. H. Bulmer, W. K. Burns, "Linear interferometric modulators in Ti: $\hbox{LiNbO}_{3}$," J. Lightw. Technol. LT-2, 512-521 (1984).
  10. M. L. Farwell, W. S. C. Chang, D. R. Huber, "Increased linear dynamic range by low biasing the Mach–Zehnder modulator," IEEE Photon. Technol. Lett. 5, 779-782 (1993).
  11. L. T. Nichols, K. J. Williams, R. D. Esman, "Optimizing the ultrawide-band photonic link," IEEE Trans. Microw. Theory Tech. 45, 1384-1389 (1997).
  12. M. M. Howerton, R. P. Moeller, G. K. Gopalakrishnan, W. K. Burns, "Low-biased fiber-optic link for microwave downconversion," IEEE Photon. Technol. Lett. 8, 1692-1694 (1996).
  13. M. M. Howerton, G. K. Gopalakrishnan, R. P. Moeller, W. K. Burns, "Low-biasing the cascaded downconverting fiber-optic link," Proc. OFC (1996) pp. 211-213.
  14. G. E. Betts, L. M. Johnson, C. H. Cox, III"Optimization of externally modulated analog optical links," Proc. SPIE-Int. Soc. Opt. Eng.—Devices for Optical Processing (1991) pp. 281-302.
  15. X. Zhang, A. Mitchell, "A simple black box model for erbium-doped fiber amplifiers," IEEE Photon. Technol. Lett. 12, 28-30 (2000).
  16. IEEEIEEE Std 802.11a-1999 [ISO/IEC 8802-11:1999/Amd 1:2000(E)] (Supplement to IEEE Std 802.11, 1999 Edition) Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications: High-Speed Physical Layer in the 5 GHz Band (1999).
  17. D. Tanguy, P. Jaffre, E. Penard, "Analysis of drive conditions of Mach–Zehnder modulator for 16-QAM transmission," Electron. Lett. 34, 1119-1121 (1998).
  18. N. Horvath, I. Frigyes, "Effects of the nonlinearity of a Mach–Zehnder modulator on OFDM radio-over-fiber transmission," IEEE Commun. Lett. 9, 921-923 (2005).
  19. M. M. Sisto, S. Larochelle, L. A. Rush, "Carrier-to-noise ratio optimization by modulator bias control in radio over fibre links," IEEE Photon. Technol. Lett. 18, 1840-1842 (2006).

Cited By

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited