Abstract

A photonic implementation of a practical broadband RF Hilbert transformer is demonstrated by using a four-tap transversal system. An almost ideal 90° phase shift with less than 3dB of amplitude ripple has been achieved from 2.4 to 17.6GHz. An efficient method to realize both transformed (quadrature-phase) and reference (in-phase) signal has been achieved by using a coarse wavelength division multiplexing coupler. Extension of the transformer bandwidth and further improvements of its implementation are discussed.

© 2008 Optical Society of America

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References

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2006 (6)

B. Vidal, T. Mengual, C. Ibanez-Lopez, J. Marti, I. McKenzie, E. Vez, J. Santamaria, F. Dalmases, and L. Jofre, IEEE Photon. Technol. Lett. 18, 1200 (2006).
[CrossRef]

L. V. T. Nguyen and D. B. Hunter, IEEE Photon. Technol. Lett. 18, 1188 (2006).
[CrossRef]

R. A. Minasian, IEEE Trans. Microwave Theory Tech. 54, 832 (2006).
[CrossRef]

D. B. Hunter and L. V. T. Nguyen, IEEE Trans. Microwave Theory Tech. 54, 900 (2006).
[CrossRef]

A. J. Seeds and K. J. Williams, J. Lightwave Technol. 24, 4628 (2006).
[CrossRef]

J. Capmany, B. Ortega, and D. Pastor, J. Lightwave Technol. 24, 201 (2006).
[CrossRef]

2005 (2)

C. D. Holdenried, J. W. Haslett, and B. Davies, IEEE Microw. Wirel. Compon. Lett. 15, 303 (2005).
[CrossRef]

L. A. Bui, A. Mitchell, K. Ghorbani, and T.-H. Chio, IEEE Microw. Wirel. Compon. Lett. 15, 309 (2005).
[CrossRef]

2004 (1)

T. Kawanishi and M. Izutsu, IEEE Photon. Technol. Lett. 16, 1534 (2004).
[CrossRef]

2003 (1)

B. Vidal, V. Polo, J. L. Corral, and J. Marti, Electron. Lett. 39, 547 (2003).
[CrossRef]

1980 (1)

J. F. Kaiser and R. W. Schafer, IEEE Trans. Acoust., Speech, Signal Process. ASSP-28, 105 (1980).
[CrossRef]

Electron. Lett. (1)

B. Vidal, V. Polo, J. L. Corral, and J. Marti, Electron. Lett. 39, 547 (2003).
[CrossRef]

IEEE Microw. Wirel. Compon. Lett. (2)

L. A. Bui, A. Mitchell, K. Ghorbani, and T.-H. Chio, IEEE Microw. Wirel. Compon. Lett. 15, 309 (2005).
[CrossRef]

C. D. Holdenried, J. W. Haslett, and B. Davies, IEEE Microw. Wirel. Compon. Lett. 15, 303 (2005).
[CrossRef]

IEEE Photon. Technol. Lett. (3)

T. Kawanishi and M. Izutsu, IEEE Photon. Technol. Lett. 16, 1534 (2004).
[CrossRef]

L. V. T. Nguyen and D. B. Hunter, IEEE Photon. Technol. Lett. 18, 1188 (2006).
[CrossRef]

B. Vidal, T. Mengual, C. Ibanez-Lopez, J. Marti, I. McKenzie, E. Vez, J. Santamaria, F. Dalmases, and L. Jofre, IEEE Photon. Technol. Lett. 18, 1200 (2006).
[CrossRef]

IEEE Trans. Acoust., Speech, Signal Process. (1)

J. F. Kaiser and R. W. Schafer, IEEE Trans. Acoust., Speech, Signal Process. ASSP-28, 105 (1980).
[CrossRef]

IEEE Trans. Microwave Theory Tech. (2)

R. A. Minasian, IEEE Trans. Microwave Theory Tech. 54, 832 (2006).
[CrossRef]

D. B. Hunter and L. V. T. Nguyen, IEEE Trans. Microwave Theory Tech. 54, 900 (2006).
[CrossRef]

J. Lightwave Technol. (2)

Other (1)

H. Emami, L. A. Bui, and A. Mitchell, in Proceedings of Asia Pacific Microwave Photonics Conference (ILCC, 2006), pp. 173-176.

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Figures (3)

Fig. 1
Fig. 1

Magnitude of impulse response of a four-tap system.

Fig. 2
Fig. 2

System implementation.

Fig. 3
Fig. 3

Measured and simulated system response: (a) magnitude, (b) phase.

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