Abstract

A novel all-optical microwave bandpass filter with negative coefficients is presented. Positive and negative coefficients are obtained through conversion from phase modulation to intensity modulation by passing the phase-modulated optical carriers through chirped fiber Bragg gratings having group-delay responses with positive and negative slopes. A two-tap transversal microwave filter with one negative coefficient is experimentally implemented.

© 2005 Optical Society of America

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References

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2004

E. H. W. Chan and R. A. Minasian, IEEE Photon. Technol. Lett. 16, 1370 (2004).
[CrossRef]

F. Zeng and J. P. Yao, Opt. Express 12, 3814 (2004).
[CrossRef] [PubMed]

2003

2000

X. Wang and K. T. Chan, Electron. Lett. 36, 2001 (2000).
[CrossRef]

S. Li, K. S. Chiang, W. A. Gambling, Y. Liu, L. Zhang, and I. Bennion, IEEE Photon. Technol. Lett. 12, 1207 (2000).
[CrossRef]

1997

F. Coppinger, S. Yegnanarayanan, P. D. Trinh, and B. Jalali, IEEE Trans. Microwave Theory Tech. 45, 1473 (1997).
[CrossRef]

1995

S. Sales, J. Capmany, J. Marti, and D. Pastor, Electron. Lett. 31, 1095 (1995).
[CrossRef]

Andres, M. V.

Bennion, I.

S. Li, K. S. Chiang, W. A. Gambling, Y. Liu, L. Zhang, and I. Bennion, IEEE Photon. Technol. Lett. 12, 1207 (2000).
[CrossRef]

Capmany, J.

Chan, E. H. W.

E. H. W. Chan and R. A. Minasian, IEEE Photon. Technol. Lett. 16, 1370 (2004).
[CrossRef]

Chan, K. T.

X. Wang and K. T. Chan, Electron. Lett. 36, 2001 (2000).
[CrossRef]

Chiang, K. S.

S. Li, K. S. Chiang, W. A. Gambling, Y. Liu, L. Zhang, and I. Bennion, IEEE Photon. Technol. Lett. 12, 1207 (2000).
[CrossRef]

Coppinger, F.

F. Coppinger, S. Yegnanarayanan, P. D. Trinh, and B. Jalali, IEEE Trans. Microwave Theory Tech. 45, 1473 (1997).
[CrossRef]

Cruz, J. L.

Gambling, W. A.

S. Li, K. S. Chiang, W. A. Gambling, Y. Liu, L. Zhang, and I. Bennion, IEEE Photon. Technol. Lett. 12, 1207 (2000).
[CrossRef]

Jalali, B.

F. Coppinger, S. Yegnanarayanan, P. D. Trinh, and B. Jalali, IEEE Trans. Microwave Theory Tech. 45, 1473 (1997).
[CrossRef]

Li, S.

S. Li, K. S. Chiang, W. A. Gambling, Y. Liu, L. Zhang, and I. Bennion, IEEE Photon. Technol. Lett. 12, 1207 (2000).
[CrossRef]

Liu, Y.

S. Li, K. S. Chiang, W. A. Gambling, Y. Liu, L. Zhang, and I. Bennion, IEEE Photon. Technol. Lett. 12, 1207 (2000).
[CrossRef]

Marti, J.

S. Sales, J. Capmany, J. Marti, and D. Pastor, Electron. Lett. 31, 1095 (1995).
[CrossRef]

Martinez, A.

Minasian, R. A.

E. H. W. Chan and R. A. Minasian, IEEE Photon. Technol. Lett. 16, 1370 (2004).
[CrossRef]

Mora, J.

Ortega, B.

Pastor, D.

Sales, S.

Trinh, P. D.

F. Coppinger, S. Yegnanarayanan, P. D. Trinh, and B. Jalali, IEEE Trans. Microwave Theory Tech. 45, 1473 (1997).
[CrossRef]

Wang, X.

X. Wang and K. T. Chan, Electron. Lett. 36, 2001 (2000).
[CrossRef]

Yao, J. P.

Yegnanarayanan, S.

F. Coppinger, S. Yegnanarayanan, P. D. Trinh, and B. Jalali, IEEE Trans. Microwave Theory Tech. 45, 1473 (1997).
[CrossRef]

Zeng, F.

Zhang, L.

S. Li, K. S. Chiang, W. A. Gambling, Y. Liu, L. Zhang, and I. Bennion, IEEE Photon. Technol. Lett. 12, 1207 (2000).
[CrossRef]

Electron. Lett.

X. Wang and K. T. Chan, Electron. Lett. 36, 2001 (2000).
[CrossRef]

S. Sales, J. Capmany, J. Marti, and D. Pastor, Electron. Lett. 31, 1095 (1995).
[CrossRef]

IEEE Photon. Technol. Lett.

S. Li, K. S. Chiang, W. A. Gambling, Y. Liu, L. Zhang, and I. Bennion, IEEE Photon. Technol. Lett. 12, 1207 (2000).
[CrossRef]

E. H. W. Chan and R. A. Minasian, IEEE Photon. Technol. Lett. 16, 1370 (2004).
[CrossRef]

IEEE Trans. Microwave Theory Tech.

F. Coppinger, S. Yegnanarayanan, P. D. Trinh, and B. Jalali, IEEE Trans. Microwave Theory Tech. 45, 1473 (1997).
[CrossRef]

Opt. Express

Opt. Lett.

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Figures (5)

Fig. 1
Fig. 1

Illustration of the recovered rf modulating signals that sustain a positive, zero, or negative chromatic dispersion.

Fig. 2
Fig. 2

System configuration of the proposed all-optical microwave bandpass filter with negative coefficients.

Fig. 3
Fig. 3

Measured reflectivity and GD responses of (a) LCFBG#1 and (b) LCFBG#2.

Fig. 4
Fig. 4

Experimental results of the implemented filter with two positive taps. (a) Measured optical spectrum (solid curve) before the PD when both LDs are reflected from the same port of LCFBG#1. (b) Frequency responses: measured (solid curve) and simulated H 2 ( ω ) (dotted curve) showing low-pass filtering.

Fig. 5
Fig. 5

Experimental results of the two-tap filter with one negative coefficient. (a) Measured optical spectrum (solid curve) when λ 1 is reflected by LCFBG#1 from the short-wavelength port and λ 2 is reflected by LCFBG#2 from the long-wavelength port. (b) Frequency responses: measured H ( ω ) (solid curve) and simulated H 2 ( ω ) (dotted curve), showing a bandpass filtering with one negative tap.

Equations (2)

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E rf ( t ) sin ( 1 2 D ω m 2 ) cos ( ω m t + φ ) ,
H ( ω ) n = 1 N P n sin ( 1 2 D n ω m 2 ) exp [ j ω m ( n 1 ) Δ τ ] ,

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