Abstract

We propose the use of an actively mode-locked fiber laser as a multitap optical source for a microwave photonic filter. The fiber laser provides multiple optical taps with an optical frequency separation equal to the external driving radio-frequency signal of the laser that governs its repetition rate. All the optical taps show equal polarization and an overall Gaussian apodization, which reduces the sidelobes. We demonstrate continuous tunability of the filter by changing the external driving radio-frequency signal of the laser, which shows good fine tunability in the operating range of the laser from 5to10GHz.

© 2006 Optical Society of America

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References

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  1. J. Capmany, B. Ortega, D. Pastor, and S. Sales, J. Lightwave Technol. 23, 702 (2005).
    [CrossRef]
  2. J. Capmany, D. Pastor, and B. Ortega, in Optical Fiber Conference (OFC) (Optical Society of America, 2005), paper OThB1.
  3. A. Seeds, IEEE Trans. Microwave Theory Tech. 50, 877 (2002).
    [CrossRef]
  4. D. B. Hunter and R. A. Minasian, IEEE Microw. Guid. Wave Lett. 6, 103 (1996).
    [CrossRef]
  5. M. Y. Frankel and R. D. Esman, IEEE Photon. Technol. Lett. 7, 191 (1995).
    [CrossRef]

2005 (1)

2002 (1)

A. Seeds, IEEE Trans. Microwave Theory Tech. 50, 877 (2002).
[CrossRef]

1996 (1)

D. B. Hunter and R. A. Minasian, IEEE Microw. Guid. Wave Lett. 6, 103 (1996).
[CrossRef]

1995 (1)

M. Y. Frankel and R. D. Esman, IEEE Photon. Technol. Lett. 7, 191 (1995).
[CrossRef]

Capmany, J.

J. Capmany, B. Ortega, D. Pastor, and S. Sales, J. Lightwave Technol. 23, 702 (2005).
[CrossRef]

J. Capmany, D. Pastor, and B. Ortega, in Optical Fiber Conference (OFC) (Optical Society of America, 2005), paper OThB1.

Esman, R. D.

M. Y. Frankel and R. D. Esman, IEEE Photon. Technol. Lett. 7, 191 (1995).
[CrossRef]

Frankel, M. Y.

M. Y. Frankel and R. D. Esman, IEEE Photon. Technol. Lett. 7, 191 (1995).
[CrossRef]

Hunter, D. B.

D. B. Hunter and R. A. Minasian, IEEE Microw. Guid. Wave Lett. 6, 103 (1996).
[CrossRef]

Minasian, R. A.

D. B. Hunter and R. A. Minasian, IEEE Microw. Guid. Wave Lett. 6, 103 (1996).
[CrossRef]

Ortega, B.

J. Capmany, B. Ortega, D. Pastor, and S. Sales, J. Lightwave Technol. 23, 702 (2005).
[CrossRef]

J. Capmany, D. Pastor, and B. Ortega, in Optical Fiber Conference (OFC) (Optical Society of America, 2005), paper OThB1.

Pastor, D.

J. Capmany, B. Ortega, D. Pastor, and S. Sales, J. Lightwave Technol. 23, 702 (2005).
[CrossRef]

J. Capmany, D. Pastor, and B. Ortega, in Optical Fiber Conference (OFC) (Optical Society of America, 2005), paper OThB1.

Sales, S.

Seeds, A.

A. Seeds, IEEE Trans. Microwave Theory Tech. 50, 877 (2002).
[CrossRef]

IEEE Microw. Guid. Wave Lett. (1)

D. B. Hunter and R. A. Minasian, IEEE Microw. Guid. Wave Lett. 6, 103 (1996).
[CrossRef]

IEEE Photon. Technol. Lett. (1)

M. Y. Frankel and R. D. Esman, IEEE Photon. Technol. Lett. 7, 191 (1995).
[CrossRef]

IEEE Trans. Microwave Theory Tech. (1)

A. Seeds, IEEE Trans. Microwave Theory Tech. 50, 877 (2002).
[CrossRef]

J. Lightwave Technol. (1)

Other (1)

J. Capmany, D. Pastor, and B. Ortega, in Optical Fiber Conference (OFC) (Optical Society of America, 2005), paper OThB1.

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Figures (4)

Fig. 1
Fig. 1

Experimental setup for the transversal microwave filter: EOM, electro-optic modulator; OCA, optical component analyzer; EDFA, erbium-doped fiber amplifier; OSA, optical component analyzer; L, length of optical fiber.

Fig. 2
Fig. 2

Detail showing the optical taps of the spectrum of the mode-locked fiber laser when the laser is externally driven at 10 GHz (solid curve), 9.5 GHz (dashed curve), and 9 GHz (dashed–dotted curve).

Fig. 3
Fig. 3

Transfer function of the microwave filter of the system for an optical tap wavelength separation of 10 GHz . Inset, the optical tap configuration obtained from the laser source when the laser is at 10 GHz .

Fig. 4
Fig. 4

(a) Detail of the transfer function for an optical tap configuration of 10 GHz (solid curve), 9.5 GHz (dashed curve), and 9 GHz (dashed–dotted curve) and (b) FSR of the filter as a function of the driving frequency of the laser. Filled circles, measurements; solid line, best linear fit.

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