Abstract

We demonstrate the implementation of feedforward linearization at 5 GHz, which is the highest operating frequency yet reported, with 500-MHz linearization bandwidth having at least 24-dB distortion suppression. Simultaneous reduction of 26-dB third-order intermodulation distortion and 7-dB laser-noise reduction is achieved at 5.2 GHz, leading to enhanced spurious-free dynamic range of 107 dB (1 Hz) in a directly modulated uncooled semiconductor laser for applications in wireless-over-fiber (WoF) systems. This paper also provides detailed analysis on feedforward, theoretical distortion reduction, criteria for component selection, and the effect of dispersion. The effectiveness of feedforward in a multichannel system is demonstrated at 5.8 GHz for fixed wireless systems, such as WiMAX. These results suggest that the feedforward-linearization arrangement can make practical multichannel and multioperator WoF systems.

© 2007 IEEE

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  1. Y. Ebine, "Development of fiber radio systems for cellular mobile communications," Proc. IEEE Int. Top. MWP (1999) pp. 249-252.
  2. H. Al-Raweshidy, K. M. Glaubitt, P. Faccin, "In-building coverage for UMTS using radio over fibre technology," Proc. IEEE Wireless Pers. Multimedia Commun. (2002) pp. 581-585.
  3. K. A. Persson, C. Carlsson, A. Alping, A. Haglund, J. S. Gustavsson, P. Modh, A. Larsson, "WCDMA radio over fibre transmission experiment using singlemode VCSEL and multimode fibre ," Electron. Lett. 42, 372-374 (2006).
  4. H. Sasai, S. Morikura, "Demonstration of radio on fibre transmission using wide dynamic range scheme for IMT-2000 cellular systems," IEICE Trans. Electron. E86-C, 1153-1158 (2003).
  5. R. S. Tucker, "Linearisation techniques for wideband analog transmitters," Summer Top. Meeting Tech. Dig. LEOS (1992) pp. 54-55.
  6. R. E. Patterson, J. Straus, G. Blenman, T. Witkowicz, "Linearisation of multichannel analog optical transmitters by quasi-feedforward compensation technique," IEEE Trans. Commun. COM-27, 582-588 (1979).
  7. G. C. Wilson, T. H. Wood, M. Gans, J. I. Zyskind, J. W. Sulhoff, J. E. Johnson, T. Tanbun-Ek, P. A. Morton, "Predistortion of electro-absorption modulators for analog CATV systems at 1.55 $ \mu\hbox{m}$," J. Lightw. Technol. 15, 1654-1662 (1997).
  8. L. Roselli, V. Borgioni, F. Zepparelli, F. Ambrosi, M. Comez, P. Faccin, A. Casini, "Analog laser predistortion for multiservice radio-over-fibre systems," J. Lightw. Technol. 21, 1211-1223 (2003).
  9. L. S. Fock, R. S. Tucker, "Simultaneous reduction of intensity noise and distortion in semiconductor lasers by feed-forward compensation," Electron. Lett. 27, 1297-1299 (1991).
  10. L. S. Fock, R. S. Tucker, "Reduction of distortion in analogue modulated semiconductor lasers by feed-forward compensation ," Electron. Lett. 27, 669-671 (1991).
  11. L. S. Fock, A. Kwan, R. S. Tucker, "Reduction of semiconductor laser intensity noise by feed-forward compensation: Experiment and theory," J. Lightw. Technol. 10, 1919-1925 (1992).
  12. J.-J. Lee, S.-H. Park, Y.-W. Choi, "Enhanced ACPR of W-CDMA signals in optical feed-forward transmitter by optimisation ," Proc. IEEE Top. Meeting Microw. Photon. (2005) pp. 59-62.
  13. D. Hassin, R. Vahldieck, "Feed-forward linearisation of analogue modulated laser diodes—theoretical analysis and experimental verification," IEEE Trans. Microw. Theory Tech. 41, 2376-2382 (1993).
  14. D. Hassin, R. Vahldieck, "Improved feed-forward linearisation of laser diodes—simulation and experimental results ," Proc. IEEE MTT-S IMS (1990) pp. 727-730.
  15. B. Buxton, R. Vahldieck, "Noise and intermodulation distortion reduction in an optical feed-forward transmitter ," Proc. IEEE MTT-S IMS (1994) pp. 1105-1108.
  16. N. Pothecary, Feed-forward Linear Power Amplifiers (Artech House, 1999).
  17. P. Kenington, High Linearity RF Amplifier Design (Artech House, 2000).
  18. S.-H. Park, Y.-W. Choi, "Significant suppression of the third order intermodulation distortion in transmission system with optical feed-forward linearised transmitter," IEEE Photon. Technol. Lett. 17, 1280-1282 (2005).
  19. T. Ismail, C. P. Liu, A. J. Seeds, "Uncooled directly modulated high dynamic range source for IEEE802.11a wireless over fibre LAN applications," Optical Fiber Commun. Conf. (OFC) Los AngelesCA (2004) Paper FE3.
  20. T. Ismail, C. P. Liu, J. E. Mitchell, A. J. Seeds, "Feed-forward linearised uncooled DFB laser in a multi-channel broadband wireless over fibre transmission at 5.8 GHz," Proc. IEEE Int. Top. Meeting MWP (2005) pp. 115-118.

2006 (1)

K. A. Persson, C. Carlsson, A. Alping, A. Haglund, J. S. Gustavsson, P. Modh, A. Larsson, "WCDMA radio over fibre transmission experiment using singlemode VCSEL and multimode fibre ," Electron. Lett. 42, 372-374 (2006).

2005 (1)

S.-H. Park, Y.-W. Choi, "Significant suppression of the third order intermodulation distortion in transmission system with optical feed-forward linearised transmitter," IEEE Photon. Technol. Lett. 17, 1280-1282 (2005).

2003 (2)

H. Sasai, S. Morikura, "Demonstration of radio on fibre transmission using wide dynamic range scheme for IMT-2000 cellular systems," IEICE Trans. Electron. E86-C, 1153-1158 (2003).

L. Roselli, V. Borgioni, F. Zepparelli, F. Ambrosi, M. Comez, P. Faccin, A. Casini, "Analog laser predistortion for multiservice radio-over-fibre systems," J. Lightw. Technol. 21, 1211-1223 (2003).

1997 (1)

G. C. Wilson, T. H. Wood, M. Gans, J. I. Zyskind, J. W. Sulhoff, J. E. Johnson, T. Tanbun-Ek, P. A. Morton, "Predistortion of electro-absorption modulators for analog CATV systems at 1.55 $ \mu\hbox{m}$," J. Lightw. Technol. 15, 1654-1662 (1997).

1993 (1)

D. Hassin, R. Vahldieck, "Feed-forward linearisation of analogue modulated laser diodes—theoretical analysis and experimental verification," IEEE Trans. Microw. Theory Tech. 41, 2376-2382 (1993).

1992 (1)

L. S. Fock, A. Kwan, R. S. Tucker, "Reduction of semiconductor laser intensity noise by feed-forward compensation: Experiment and theory," J. Lightw. Technol. 10, 1919-1925 (1992).

1991 (2)

L. S. Fock, R. S. Tucker, "Simultaneous reduction of intensity noise and distortion in semiconductor lasers by feed-forward compensation," Electron. Lett. 27, 1297-1299 (1991).

L. S. Fock, R. S. Tucker, "Reduction of distortion in analogue modulated semiconductor lasers by feed-forward compensation ," Electron. Lett. 27, 669-671 (1991).

1979 (1)

R. E. Patterson, J. Straus, G. Blenman, T. Witkowicz, "Linearisation of multichannel analog optical transmitters by quasi-feedforward compensation technique," IEEE Trans. Commun. COM-27, 582-588 (1979).

Electron. Lett. (3)

K. A. Persson, C. Carlsson, A. Alping, A. Haglund, J. S. Gustavsson, P. Modh, A. Larsson, "WCDMA radio over fibre transmission experiment using singlemode VCSEL and multimode fibre ," Electron. Lett. 42, 372-374 (2006).

L. S. Fock, R. S. Tucker, "Simultaneous reduction of intensity noise and distortion in semiconductor lasers by feed-forward compensation," Electron. Lett. 27, 1297-1299 (1991).

L. S. Fock, R. S. Tucker, "Reduction of distortion in analogue modulated semiconductor lasers by feed-forward compensation ," Electron. Lett. 27, 669-671 (1991).

IEEE Photon. Technol. Lett. (1)

S.-H. Park, Y.-W. Choi, "Significant suppression of the third order intermodulation distortion in transmission system with optical feed-forward linearised transmitter," IEEE Photon. Technol. Lett. 17, 1280-1282 (2005).

IEEE Trans. Commun. (1)

R. E. Patterson, J. Straus, G. Blenman, T. Witkowicz, "Linearisation of multichannel analog optical transmitters by quasi-feedforward compensation technique," IEEE Trans. Commun. COM-27, 582-588 (1979).

IEEE Trans. Microw. Theory Tech. (1)

D. Hassin, R. Vahldieck, "Feed-forward linearisation of analogue modulated laser diodes—theoretical analysis and experimental verification," IEEE Trans. Microw. Theory Tech. 41, 2376-2382 (1993).

IEICE Trans. Electron. (1)

H. Sasai, S. Morikura, "Demonstration of radio on fibre transmission using wide dynamic range scheme for IMT-2000 cellular systems," IEICE Trans. Electron. E86-C, 1153-1158 (2003).

J. Lightw. Technol. (3)

L. S. Fock, A. Kwan, R. S. Tucker, "Reduction of semiconductor laser intensity noise by feed-forward compensation: Experiment and theory," J. Lightw. Technol. 10, 1919-1925 (1992).

G. C. Wilson, T. H. Wood, M. Gans, J. I. Zyskind, J. W. Sulhoff, J. E. Johnson, T. Tanbun-Ek, P. A. Morton, "Predistortion of electro-absorption modulators for analog CATV systems at 1.55 $ \mu\hbox{m}$," J. Lightw. Technol. 15, 1654-1662 (1997).

L. Roselli, V. Borgioni, F. Zepparelli, F. Ambrosi, M. Comez, P. Faccin, A. Casini, "Analog laser predistortion for multiservice radio-over-fibre systems," J. Lightw. Technol. 21, 1211-1223 (2003).

Other (10)

T. Ismail, C. P. Liu, A. J. Seeds, "Uncooled directly modulated high dynamic range source for IEEE802.11a wireless over fibre LAN applications," Optical Fiber Commun. Conf. (OFC) Los AngelesCA (2004) Paper FE3.

T. Ismail, C. P. Liu, J. E. Mitchell, A. J. Seeds, "Feed-forward linearised uncooled DFB laser in a multi-channel broadband wireless over fibre transmission at 5.8 GHz," Proc. IEEE Int. Top. Meeting MWP (2005) pp. 115-118.

D. Hassin, R. Vahldieck, "Improved feed-forward linearisation of laser diodes—simulation and experimental results ," Proc. IEEE MTT-S IMS (1990) pp. 727-730.

B. Buxton, R. Vahldieck, "Noise and intermodulation distortion reduction in an optical feed-forward transmitter ," Proc. IEEE MTT-S IMS (1994) pp. 1105-1108.

N. Pothecary, Feed-forward Linear Power Amplifiers (Artech House, 1999).

P. Kenington, High Linearity RF Amplifier Design (Artech House, 2000).

J.-J. Lee, S.-H. Park, Y.-W. Choi, "Enhanced ACPR of W-CDMA signals in optical feed-forward transmitter by optimisation ," Proc. IEEE Top. Meeting Microw. Photon. (2005) pp. 59-62.

R. S. Tucker, "Linearisation techniques for wideband analog transmitters," Summer Top. Meeting Tech. Dig. LEOS (1992) pp. 54-55.

Y. Ebine, "Development of fiber radio systems for cellular mobile communications," Proc. IEEE Int. Top. MWP (1999) pp. 249-252.

H. Al-Raweshidy, K. M. Glaubitt, P. Faccin, "In-building coverage for UMTS using radio over fibre technology," Proc. IEEE Wireless Pers. Multimedia Commun. (2002) pp. 581-585.

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